Индикатор пространственного позиционирования

Полезная модель относится к устройствам для определения часовой и угловой ориентации дефекта на трубе. Сущность заявленного решения заключается в том, что в устройстве используется циферблат со смещенным центром тяжести, свободно вращающийся на оси, на котором нанесена часовая и угловая градации, с установленным на корпусе указателем. Техническим результатом полезной модели является повышение точности определения ориентации дефектов трубы. 2 ил.

Dipolnachweis- und- ortungsverfahren

METHODE UND GERÄT ZUR KOORDINATENMESSUNG MIT EINER KAPAZITÄTSSONDE

Elektromagnetischer Positions- und Orientationssensor.

Vorrichtung zur Ermittlung einer Position.

Läuferpositionsmesssystem

Läuferpositionsmesssystem,aufweisend einen ebenen weichmagnetischen Stator (1), einen aktiven translatorischen Läufer (2), eine X-Achsen-Sensoreinheit (3), eine Auswertungseinheit (4) und eine Permanentspannungsquelle (5),wobei der ebene weichmagnetische Stator (1) in einer X-Achse eine linear angeordnete Zahnstruktur (6) aufweist, welche durch Statorzähne (6a) und Statorzahnlücken (6b) ausgebildet ist,wobei die Zahnstruktur (6) in der X-Achse linear angeordnete magnetisierbare Strukturpaare (7) ausbildet,wobei der aktive translatorische Läufer (2) linear zu der X-Achse in einer Statorebene beweglich ist,wobei die X-Achsen-Sensoreinheit (3) einen X-Achsen-Inkrementzählersensor (8) und X-Achsen- Intrainkrementalsensor (9) aufweist,wobei die X-Achsen-Sensoreinheit (3) in einer festen Lagebeziehung zu dem aktiven translatorischen Läufer (2) steht und ausgebildet ist, magnetisch oder kapazitiv eine Position entlang der X-Achse zu erfassen,wobei der X-Achsen-Inkrementzählersensor (8) ausgebildet ...

FINGERABDRUCKSENSORVORRICHTUNG UND SYSTEME DIE SOLCHE VORRICHTUNGEN AUFWEISEN

VERSCHIEBUNGSTROMSENSOR UND VERFAHREN ZUM FESTSTELLEN VON POSITION, AUSRICHTUNG UND MASSENVERTEILUNG IN DREI DIMENSIONEN

SENSORVORRICHTUNG UND ZUGEHÖRIGES VERFAHREN

Verfahren und Vorrichtung zur Bestimmung einer jeweiligen örtlichen Position eines Körpers durch kapazitive Abtastung

POSITIONAL TRANSDUCERS

... 1321831 Positional transducers NATIONAL RESEARCH DEVELOPMENT CORP 11 June 1970 [20 June 1969] 31380/69 Heading G1N A transducer for obtaining the x, y co-ordinates of the position of a movable member comprises a matrix of square reference electrodes 2 Fig.2a on one face of an insulating base plate (not shown) and a square sensor electrode 3 on the other face of the base plate. The reference electrodes are individually fed with a voltage that progresses in the two co-ordinate directions, supplied alternately at a fixed frequency, whereby the voltages picked up on the sensor electrode are alternately indicative of the x and y displacement. After a coarse measurement the reference voltage may be applied only to the reference electrodes in the immediate vicinity of the sensor electrode to increase sensitivity. The matrix may be mounted on a flat or cylindrical base plate.

PRECISION WIRE GRID GLASS DIGITIZING TABLETS

ELECTRO-GRAPHIC CONVERSION APPARATUS

... 1325493 Laminates NATIONAL RESEARCH DEVELOPMENT CORP 4 Jan 1971 [14 Jan 1970] 1880/71 Addition to 1239558 [Also in Division G4] In a system for digitizing the movement of a stylus over a writing tablet the tablet is made up of two halves separated by an insulating layer 79 (Fig. 3), one half consisting of two sets 71, 72 and 73, 74 of copper conductors printed on fibreglass sheets 76, 78 separated by an insulating layer 77. The second half is identical except that the conductors 711 , 721, 731, 741, are at right-angles to the conductors of the first half. The top and bottom sections 44, 83 are insulating layers.

POSITION COORDINATE DETERMINATION DEVICE

SAMPLE LOCATION IDENTIFICATION SYSTEM

APPARATUS FOR MAKING WIRE GRID GLASS DIGITIZING TABLETS

An improved wire grid glass tablet for digitizing graphic information which includes a glass plate with a resin layer bonded to one side and having orthogonal grids of wires, made of a ductile material which is stretched beyond the yield point, embedded in the resin layer near the surface thereof to maximize signal-to-noise ratio coupling to the wires.

Manufacture of interactive surface

Position locating system

A position locating system includes a plotting surface 10 upon which a map or chart may be located. A cursor 14 is movable over the surface, and circuit means 11, 12, 13, 20 is provided to derive electrical signals denoting the position of the cursor. Comparison means 21, 22, are provided to compare the position denoted by these signals with other signals representing a required position on the surface. Outputs of the comparison means control a number of light sources 16, 17, 18, 19 carried on the cursor and arranged to provide an indication of the direction in which the cursor should be moved to reach the required position. The amount of movement required may also be indicated. For example, comparators may control means for interrupting the light sources at a rate which increases as the required position is approached, until finally the sources are entirely extinguished. ...

Wireless electromagnetic position tracking

A system 100 and method (200, figure 2) for wireless EM instrument 130 tracking uses a three-coil wireless transmitter 110 located at the instrument 130. The transmitter 110 broadcasts a wireless signal which is received by a remote receiver assembly 120, and the instrument position is determined by tracker electronics 150 based on a relationship between the transmitter and receiver. The remote receiver may comprise two receiver coil trios. Position information may be determined using triangulation between the transmitter and receiver, by determining a range and gain between the transmitter and receiver or by determining a magnitude and phase of the transmitted signal. The embodiment shows tracking the location of a medical device (e.g. a surgical drill) for surgical navigation. Other applications include forensics, retail stores and virtual reality systems.

Precision wire grid glass digitizing tablets

An improved wire grid glass tablet for digitizing graphic information which includes a glass plate with a resin layer bonded to one side and having orthogonal grids of wires, made of a ductile material which is stretched beyond the yield point, embedded in the resin layer near the surface thereof to maximize signal-to-noise ratio coupling to the wires.

Position or orientation determination based on duty-cycled frequency multiplexed electromagnetic signals

A three-axis magnetic source 110 comprises a set of coils 111, 112, 113 and a power supply 125. A first power and second power are alternately applied to drive the set of coils to generate frequency multiplexed electromagnetic signals during time intervals (see figure 4, not shown) defined by a duty cycle, the first power being higher than the second power. The set of coils may be mutually orthogonal to one another. The source may further include an inertial measurement unit (255, fig 2, not shown) to measure acceleration and gyroscopic orientation of the source and an interface (265) to convey values of the measurements. A signal generator 115 may generate signals based upon an indication of noise, such that the signals are generated for frequencies having noise levels below a threshold. The source can be used to determine the position of a three-axis magnetic sensor based upon the signals received by the sensor.

APPARATUS AND METHOD FOR MEASUREMENT OF A WORKPIECE

VORRICHTUNG ZUR ELEKTRISCHEN ERFASSUNG VON ZWEI-DIMENSIONALEN ORTSKOORDINATEN EINES PUNKTES MIT EINER VORZUGSWEISE RECHTECKIGEN PLATTE UND EINER ABTASTVORRICHTUNG

Messen von Positionen, mechanischen Verschiebungen und Rotationen von Körpern

Die Erfindung betrifft eine Vorrichtung und eine Verfahren zum Messen der relativen Position und den Winkeln zwischen zwei zu messenden Körpern (7, 77). Die Erfindung ist dadurch gekennzeichnet, dass sie einem oder mehreren Permanentmagneten (6), aufweist und dass die zu messende Position indirekt über ein Magnetfeld bestimmt wird. Das Magnetfeld wird durch einen oder mehrere Magnetfeldsensoren (3) detektiert, der mit einem Mikrochip ausgelesen wird. Um auf die Position und den Winkel des Permanentmagnetsystems (6) in Relation zu den Magnetfeldsensoren (3) rückzurechnen wird eine mathematische Minimierungsmethode verwendet. Die Energie die für das Auslesen der Sensoren benötigt wird, kann durch das Anregefeld eines Auslesegeräts bezogen werden. Der Sensor kann ohne Energieversorgung auskommen und kann mittels Standardauslesegeräte, wie Beispielsweise eines NFC fähiges mobiltelefon ausgelesen werden.

Apparatus for injecting insulating

Es wird eine Vorrichtung zum Einblasen von Dämmstoff in einseitig offene Dämmstoffkammern (2) eines Wandelements (3) mit einer zumindest eine Dämmstoffkammer (2) abdeckenden Einblasplatte (1), die auf der den Dämmstoffkammern (2) zugekehrten Unterseite eine luftdurchlässige Decklage (6) mit wenigstens einer Einblasöffnung (5) für den Dämmstoff aufweist, und mit einer an eine Auswerteeinheit angeschlossenen Erfassungseinrichtung für den Verlauf der die Dämmstoffkammern (2) umfangsseitig begrenzenden Stege (8) beschrieben. Um vorteilhafte Konstruktionsverhältnisse zu schaffen, wird vorgeschlagen, dass die Erfassungseinrichtung für den Wandverlauf der Dämmstoffkammern (2) wenigstens zwei Scharen von auf der Unterseite der Einblasplatte (1) vorgesehenen Folienpotentiometern (9, 10) umfasst, die scharenweise in unterschiedlichen Richtungen verlaufen.

POSITION MEASURING INSTRUMENT.

PROCEDURE AND MECHANISM FOR THE DETERMINATION OF THE COORDINATES OF THE POINT ON A SURFACE.

PROCEDURE FOR THE DETERMINATION OF THE POSITION OF A SENSOR ELEMENT

DEVICE FOR POSITIONING WITH DYNAMIC METAL IMMUNITY

Magnetic location system with adaptive feedback control

METHOD AND APPARATUS FOR DETERMINING THE COORDINATES OF A POINT ON A SURFACE

METHOD AND DEVICE FOR OBTAINING NUMERICAL COORDINATES OF A POINT OR A SET OF POINTS

AUTOMATIC COORDINATE DETERMINING DEVICE

DEVICE, SYSTEM AND/OR METHOD FOR POSITION TRACKING

Disclosed is a device, system and method for use with sensors including an accelerator, a gyroscope and magnetometers to determine position and orientation of a probe. The probe may be attached to, or incorporate other instruments such as ultrasound transducer and surgical instruments. Each of the sensors generate sensor data, including calibration data. The system may also have a second position sensor in proximity to the probe. The system also has a processing engine receiving the sensor data for calculating the position and orientation of the probe relative to the second position sensor.

MAGNETIC POSITIONING SYSTEM

Embodiments described herein relate to a magnetic positioning system and method that allows the position of a receiver to be determined in environments containing conducting material such as concrete. A number of transmitters create modulated magnetic fields which are distorted as they propagate through the conducting materials. A finite difference time domain (FDTD) simulation of the environment is used to generate an accurate model of the fields within the environment. A receiver is used to measure the field strength of each transmitter. The receiver position is determined by evaluating the misfit between the received fields and the values in the FDTD model.

SENSING OF A MAGNETIC TARGET

An apparatus comprises a magnetic target for generating a magnetic field that is uniform and concentric about a central axis of the target; an array of three-axis digital magnetic compasses for sensing the magnetic field; and a processor for finding intersection points of vectors from the compasses to the target. The vectors lie in a global X-Y plane that is normal to the central axis. Each vector indicates a direction of sensed magnetic field from one of the compasses to the magnetic target.

DEVICE FOR MEASURING SURFACE DIMENSIONS OF AN OBJECT

The invention relates to a device for measuring surface dimensions of an object (12), comprising an elongate flexible material piece (2), which is supported on a roller (1) in such a way that the material piece (2) can be unwound and on the end of which a probe (3) is provided, wherein the roller is connected to a base (5) of the device in such a way that the roller can be rotated about a vertical axis (4'), and wherein two sensors are provided, by means of which the unwound length of the material piece and the angle of the roller with respect to the base can be detected, wherein the base consists of a planar bottom plate and the roller is arranged on the side facing away from the contact surface (6) of the bottom plate.

DIPOLE DETECTION AND LOCALIZATION PROCESSING

Dipole detection and localization systems and methods employing improved processing techniques. The first processing technique provides for higher spatial resolution by implementing maximum likelihood beamforming processing to detect and locate a dipole in a manner analogous to the processing of wave propagation phenomena. The high resolution technique is comprised of using data derived from an array of magnetic sensors that is arranged in the form of a vector of coefficients in lieu of a matrix. This vector can be either the magnetic field components or the Andersonfunction expansion coefficients and is used to form a dyadic matrix, to which a multiple of an identity matrix is added to prevent singularity. The second improvement uses more than three Anderson function expansions to achieve detection and localization of the dipole. The use of more than three Anderson functions more effectively normalizes out the noise dependence by providing better noise representations, and provides fordetection ...

Fingerprint Acquisition Sensor

DISPLACEMENT-CURRENT SENSOR AND METHOD FOR DETERMINING THREE-DIMENSIONAL POSITION, ORIENTATION AND MASS DISTRIBUTION

A quasi-electrostatic sensing system surrounds an electrically conductive mass with an electric field, the magnitude of which is sensed at one or more locations to resolve a property of interest concerning the mass. The object intercepts a part of the electric field extending bewteen the AC-coupled "sending" electrode and the other "receiving" electrodes, the amount of the field intercepted depending on the size and orientation of the sensed mass, whether or not the mass provides a grounding path, and the geometry of the distributed electrodes. Because the response of the field to an object is a complex nonlinear function, adding electrodes can always distinguish among more cases. In other words, each electrode represents an independent weighting of the mass within the field; adding an electrode provides information regarding that mass that is not redundant to the information provided by the other electrodes. A "forward model" that relates the behavior of the system to variations in the ...

Verfahren zum Bestimmen der Koordinaten des Mittelpunktes eines mindestens näherungsweise kreisförmigen Gebildes, relativ zu einem festen ebenen Koordinatensystem

Jauge dimensionnelle sans contact

Dispositif d'indication de la position d'un point par rapport à au moins une coordonnée

Appareil de détermination de coordonnées

Device for the microscopic analysis of trip recorder diagrams

PROCEDURE AND ARRANGEMENT FOR THE AUTOMATIC MEASUREMENT OF A WORKPIECE.

Method of determining the position of a point according to its coordinates and apparatus for carrying out this method

The method is characterised in that the position of a point (B) is determined according to preset coordinates (x, y and z) in the orthogonal coordinate system (XYZ) by positioning a base point (Bo), which takes place by the use of only the polar coordinates alpha , beta and gamma , and during the positioning the base point (Bo) is displaced about the centre (O) in accordance with the said angles alpha , beta and gamma . The apparatus for carrying out this method contains a fixed supporting body (22) and a mechanical drive arm which is connected to the supporting body (22) via an epicyclic gear system which includes a planetary gear (24) and a web (25) which has a rotary spindle (26) fastened to the housing (27) of the epicyclic gear system. Furthermore, according to the invention, the apparatus contains four-bar parallelograms rigidly connected to one another, the rotary spindle (26) of the web (25) passing through the centre (O) of the orthogonal coordinate system (XYZ) and being fastened ...

TABLET OF DIGITALIZZAZIONE IN E GLASS TO GRIGLIE OF WIRES OF PRECISION.

POSITION MEASURING INSTRUMENT.

Device for the determination of a surface outline.

RELATIVE POSITIONING RELATIVE AND - DEVICE BETWEEN WORKPIECE, TOOL AND MEASURING PROBES.

DEVICE FOR MEASURING SURFACE DIMENSIONS OF AN OBJECT

Apparatus and method for classifying orientation of a body of a mammal

Apparatus is disclosed for providing classification of body orientation of a mammal. The apparatus includes means (10, 11) for measuring position of said body relative to a frame of reference at one or more points on the body, wherein said means for measuring includes at least one position sensor. The apparatus includes means (12) for providing first data indicative of said position; means (15) for storing said data at least temporarily; and means (13, 14) for processing said data to provide said classification of body orientation. A method for providing classification of body orientation of a mammal is also disclosed.

Used to classify the mammalian body to orientation of the device and method

A POSITION DETECTION DEVICE OF A CONTROL MEMBER ON A TOUCH-SENSITIVE TABLET

PROCEDE ET DISPOSITIF POUR OBTENIR LES COORDONNEES NUMERIQUES D'UN POINT OU D'UN ENSEMBLE DE POINTS

CE DISPOSITIF POUR DETERMINER LES COORDONNEES NUMERIQUES D'UN POINT OU D'UN ENSEMBLE DE POINTS6 COMPREND DEUX FILS 1, 2 DONT UNE EXTREMITE COMMUNE 3, 4 DE CHACUN EST RELIEE A UN STYLET5 PERMETTANT DE SE SITUER SUR LEDIT POINT OU DE PARCOURIR L'ENSEMBLE DES POINTS6, CHACUNE DES AUTRES EXTREMITES DE CES FILS 1, 2 PROVENANT D'UNE RESERVE DE FILS 7, 8, LE DISPOSITIF COMPRENANT EN OUTRE DES MOYENS POUR MESURER LES VARIATIONS DE LONGUEUR DE CHACUN DES FILS 1, 2, CES MOYENS ETANT CONSTITUES PAR DEUX ROUES A CRENEAUX 20, 21 ENTRAINEES EN ROTATION PAR UNE ROUE DENTEE 11, 12, LES VARIATIONS ANGULAIRES DE CES ROUES A CRENEAUX 20, 21 ETANT MESUREES PAR EXEMPLE A L'AIDE DE PHOTO-TRANSISTORS COOPERANT AVEC UNE SOURCE DE LUMIERE.

Dispositif de relevé tridimensionnel

L'invention est relative à un dispositif de relevé tridimensionnel. Il comprend un ensemble de tiges 1 articulées les unes à la suite des autres, une des extrémités dudit ensemble de tiges étant montée sur un socle 3 et l'autre extrémité étant munie d'une tête de mesure 5, chaque articulation 2 comprenant des moyens de mesure pour déterminer la direction relative des deux tiges adjacentes à cette articulation; et des moyens de calcul 3 pour calculer les coordonnées de la tête de mesure dans un repère au socle à partir des indications fournies par lesdits moyens de mesure.

PROCESS AND AUTOMATIC DEVICE OF MEASURING Of a PART

Three=dimensional locating system for mobile tool member - assigns position vector for all theoretical locations which is corrected as function of field position

NON-DESTRUCTIVE TESTING DEVICE CONFIGURATION

COORDINATE MEASURING MACHINE

Electric charge two or three=dimensional position pick=up - has resistive collector surface, dielectric layer and earthed conductor

Combined mechanical and electronic device, producing a digital display showing the coordinates of an image point on a photo microscope plate

DEVICE OF DETECTION OF the POSITION Of an ARM ARTICULATES

Process of determination of the position of an object

L'invention concerne un procédé de détermination de positions d'objets mesurés. Un certain nombre de mesures des directions (15) menant à l'objet à mesurer (14) sont réalisées à des instants séparés (a, b, c). Pendant les mesures initiales des directions (15), un certain nombre de zones supposées - hypothèses ((i-2) - (i+2)) - à l'intérieur desquelles les objets mesurés sont supposés se trouver, sont établies suivant la direction de chaque objet mesuré. Des mesures des directions menant aux objets mesurés sont ensuite effectuées à partir d'au moins deux postes de mesure différents (10, 11) déplacés suivant des trajets différents (12, 13). Domaine d'application: détermination des positions d'objets éloignés, etc.

Method and apparatus for determining precision of numerically controlled machine tool devices

A system for determining the precision of a numerically controlled machine ool involves setting the machine tool control to define a circular path. A circular standard is then aligned with the machine tool to sense the desired circular path. A continuous or pointwise sensing, as a function of whether a path-controlled or a point-by-point-controlled machine is being measured, of the aligned standard is performed. A faulty machine tool does not accurately cover the defined circular path. Variations from the desired circle can be plotted and used for evaluation.

Method and apparatus for determining the position of the center of a circular object

The invention relates to a method and apparatus for determining the position of the center of a circular object. The object has a known diameter and is placed on a preferably flat surface. A sensor for indicating presence of an object proximate it is moved over the surface in a predetermined path comprising a number of line portions extending over the surface. The greatest distance between two adjacent line portions being less than the radius of the object. The position of the sensor in the path is measured at two points where the line portion intersects the outer contour of an object. The center of the object is determined on the basis of the two points.

Short-distance positioning system

The invention relates to a short distance positioning system for a mobile object with respect to a fixed reference system, in which: the mobile object is equipped with a probe (1) comprising at least one resonant circuit (L1C1) enabling reception of a magnetic field with frequency fgand transmission of a magnetic field at frequency fe; and, the reference system (2) is provided with: means of transmission/reception (3; 5) of a magnetic field comprising a voltage generator (G) generating a signal with frequency fgpowering at least one electromagnetic coil (L3; L5) and at least one capacitor (C3; C5) forming a series resonant circuit, with the said coil; anti-dazzle means by which the transmission/reception means can distinguish the magnetic field with frequency fefrom the magnetic field with frequency fg; and detection and comparison (4) means to detect the amplitude of the voltage induced at the terminals of the resonant transmission/reception circuit and to deduce the displacement of the ...

Method and apparatus employing received independent magnetic field components of a transmitted alternating magnetic field for determining location

The location method uses relatively low frequency electromagnetic fields, e.g., 1-1000 Hz, for determining the relative position and/or orientation of a transmitting magnetic dipole antenna by using a vector field receiver. The transmitting antenna for subterranean location, is preferably a single axis, elongated solenoid with a ferromagnetic core. The receiving sensor may be a precise three-axis magnetic field detector of either a magnetometer or search coil type. Measurements are made for one or more positions of either the transmitter or receiver, or with one or more transmitters or receivers. The relative location of the transmitter and the receiver is calculated with respect to some known survey station by a method of successive approximations. The operating frequency is chosen to minimize field distortion from common steel structures, such as pipe, casing or railroad tracks, and to minimize field scattering such as from conducting inhomogeneities in the earth. Either the transmitter ...

Object location system and method using field actuation sequences having different field strengths

A method and system of operating a location system to locate objects in space, such as medical instruments (16) within the body of a patient is presented. The method includes cyclically actuating transmitters (10a, 10b, 10c) in a fixed frame of reference for the transmission of magnetic fields to a plurality of sensing units (54a, 54b, 54c). The sensing units detect characteristics of the fields during actuation sequences for determining location. At least one transmitter may be actuated during at least some of the cycles in a plural-value actuation sequence to provide a field with different field strengths during a sequence of plural sensing intervals, and with a progressively varying field strength value during transition intervals between the sensing intervals.

Method and apparatus for the contactless determination of the relative positions of two bodies

To determine the relative positions of two bodies, an alternating current is passed through a conductive path in the first body, establishing an alternating magnetic field around the body, the amplitude of the field decreasing in inverse proportion to the distance from the conductive path. Coil pairs are supported on a second body so as to essentially surround the first body, the coils being used to produce voltages proportional to the intensity of the magnetic field, thereby providing differential distance information. The voltage differences of the coils can be used for establishing the shape of the first body or for positioning the second body to a coaxial location of the coil pairs with respect to the first body. The determination is largely free from interference.

Low-frequency electromagnetic tracking

A medical system tracks the position of a medical instrument within a body of a patient. The medical instrument includes an electromagnet structure having an inductor coil wound around a core. A control circuit applies a low frequency excitation signal across the inductor coil. The inductor coil and the core generate a magnetic field. A plurality of sensors sense parameters of the generated magnetic field and produce sensor signals. The control circuit calculates the position of the medical instrument based on the produced sensor signals.

ELECTRICAL ARRANGEMENTS FOR SENSOR ASSEMBLIES IN ELECTROMAGNETIC NAVIGATION SYSTEMS

A sensor assembly includes a multilayer circuit, a first magnetic field sensor, and a second magnetic field sensor. The multilayer circuit extends between a proximal end and a distal end along a longitudinal axis. The multilayer circuit includes a plurality of electrical pads positioned at the proximal end. The first magnetic field sensor is coupled to the multilayer circuit and has a primary sensing direction aligned with the longitudinal axis. The second magnetic field sensor is coupled to the multilayer circuit and oriented with respect to the first magnetic field sensor such that the second magnetic field sensor has a primary sensing direction aligned with an axis orthogonal to the longitudinal axis. 1. A system comprising: a multilayer circuit including a proximal section, a distal section, and a longitudinal axis, the proximal section including a plurality of electrical pads,', 'a first magnetic field sensor coupled to the multilayer circuit at the distal section and having a primary sensing direction aligned with the longitudinal axis, and', 'a second magnetic field sensor coupled to the multilayer circuit at the distal section and oriented with respect to the first magnetic field sensor such that the second magnetic field sensor has a primary sensing direction aligned with an axis orthogonal to the longitudinal axis,', 'wherein the multilayer circuit includes a flexible substrate layer, wherein a first subset of the plurality of electrical pads is positioned on a first side of the flexible substrate layer, and wherein a second subset of the plurality of electrical pads is positioned on a second side of the flexible substrate layer opposite the first side., 'a sensor assembly including2. The system of claim 1 , wherein the proximal section of the multilayer circuit is substantially c-shaped.3. The system of claim 1 , wherein the flexible substrate layer is only partially covered by a mask layer such that a portion of the flexible substrate layer is exposed.4. ...

POSITION DETECTION DEVICE, SIGNAL PROCESSING CIRCUIT, AND MAGNETIC SENSOR SYSTEM

A magnetic sensor system includes a magnetic sensor device and a signal processing circuit. The magnetic sensor device generates first to third detection signals corresponding to components in three directions a field generated by a magnetic field generator that is able to change its relative position with respect to the magnetic sensor device. The signal processing circuit includes first and second processors. The second processor generates sphere information and transmits it to the first processor. When coordinates representing a set of values of the first to third detection signals in an orthogonal coordinate system are taken as a measurement point, the sphere information includes data on center coordinates of a virtual sphere having a spherical surface approximating a distribution of a plurality of measurement points. The first processor detects a change in offsets of the first to third detection signals by using the sphere information transmitted from the second processor.

Method for estimating the harmonization values of a magnetometer installed in a mobile machine, associated device and computer program

A method for estimating the harmonization values of a magnetometer installed in a mobile machine, said magnetometer being associated with its reference coordinate system XM, YM, ZM, said method, implemented by an electronic device, comprising acquiring magnetic field values measured by the magnetometer and determining the horizontal harmonization (hx, hy) by: estimating a first angle equal to the angle between XM and the large axis of an ellipse, defined in the plane comprising the two axes XM, ZM, by said acquired field values; determining hy as being equal to said first estimated angle, estimating a second angle equal to the angle between YM and the large axis of an ellipse defined, in the plane comprising the two axes YM, ZM, by said acquired field vector values; and determining—hx as being equal to said second estimated angle.

Image capture device calibration

A three-dimensional coordinate position of a calibration device is determined. Further, a code is emitted to an image capture device. The code indicates the three-dimensional coordinate position of the calibration device. In addition, an image of light emitted from the calibration device is captured. The light includes the code. An image capture device three-dimensional coordinate position of the calibration device is calibrated according to the real world three-dimensional coordinate position of the calibration device indicated by the code.

Apparatus for determining the spatial position of a movable sensor with respect to a reference element

Spatial position measuring device using sensing element which is movable w.r.t. reference element The arrangement has three orthogonal coils (4-6) in the sensing element (3), each consisting of at least one wire winding. The wire windings have mutually perpendicular winding axes and are wound around a common centre point (7). At least three reference coils (2) are arranged at spatially separate points in the reference element (1) and each consists of at least one wire winding. A current generator stimulates the orthogonal or reference coils with a defined a.c. stimulation current. An evaluation circuit (15) for the voltages induced in the reference coils or orthogonal coils contains a computer circuit which computes the distance coordinates and centre point of the orthogonal coils in a coordinate system associated with the reference element from the induced voltages. A feedback circuit (13) controls the stimulation current depending on the amplitudes of the induced voltages.

A DIRECT CURRENT UTILIZATION POSITION AND ORIENTATION MEASURING DEVICE

A device for measuring the position and orientation of receiving antennae (3) with respect to transmitting antennae (2) utilizing electromagnetic signals. The transmitting and receiving components of the instant device consist of two or more separate transmitting antennae of known position and orientation with respect to each other. Each transmitting antenna (2) is driven one at a time by a pulsed, direct current signal. The receiving antennae (3) measure the transmitted direct current magnetic field and the Earth's magnetic field as well. A computer device (5) is used to control the transmitting and receiving elements and to convert the receiving signals into position and orientation outputs.

ОПРЕДЕЛЕНИЕ СКОРОСТИ МНОГОМЕРНОГО ПЕРЕМЕЩЕНИЯ В ГЛОБАЛЬНОЙ СИСТЕМЕ КООРДИНАТ

Изобретение относится к способам и устройствам для определения скорости перемещения спортсмена. Способ определения скорости перемещения спортсмена заключается в том, что на конечности спортсмена, к которой привязана локальная система координат, размещают многомерный акселерометр. На основании данных об ускорении, полученных с помощью акселерометра, определяют по крайней мере одно корректирующее значение скорости, используемое для компенсации возникающего при перемещении спортсмена поворота локальной системы координат относительно неподвижной глобальной системы координат. Далее данные об ускорении интегрируют и определяют скорость перемещения спортсмена. Полученное значение скорости корректируют с помощью указанного корректирующего значения скорости. Устройство для определения скорости перемещения спортсмена содержит многомерный акселерометр, размещенный на конечности спортсмена, процессор, выполненный с возможностью определения по меньшей мере одного корректирующего значения скорости на ...

МНОГОКООРДИНАТНЫЙ ДАТЧИК ДЕФОРМАЦИОННОГО МОНИТОРИНГА

Изобретение может быть использовано для деформационного мониторинга различных объектов. Многокоординатный датчик содержит основание с опорой, установленное на основании шаровое сочленение с отверстием, преобразователь линейных одноосных перемещений в виде стержня, предназначенного для контакта с объектом мониторинга, два преобразователя угловых перемещений в виде полуколец с продольными прорезями, регистраторы угловых перемещений, неподвижные контакты которых установлены на внутренней стороне прорезей, а подвижным контактом является стержень, и регистратор линейных одноосных перемещений, неподвижный контакт которого установлен на стержне, а его подвижный контакт установлен на шаре. Датчик снабжен карданным валом, площадкой, закрепленной на первой полуоси карданного вала и предназначенной для жесткого соединения с объектом мониторинга, и датчиком угловых поворотов, подвижный контакт которого закреплен на второй полуоси карданного вала, а неподвижный контакт закреплен на стержне, при этом ...

УСТРОЙСТВО ДЛЯ КОМПЕНСАЦИИ ЛОКАЛЬНОЙ ПОГРЕШНОСТИ В ЭЛЕКТРОМАГНИТНЫХ СИСТЕМАХ СЛЕЖЕНИЯ

... 1. Способ компенсации локальной погрешности искажений, вносимых металлом, при использовании электромагнитной системы слежения (EMTS), содержащий: ! генерацию электромагнитного поля по меньшей мере одним генератором электромагнитного поля; ! мониторинг медицинского устройства, имеющего по меньшей мере одну электромагнитную сенсорную катушку и перемещаемого внутри человеческого тела; ! мониторинг данных результатов измерений местоположения от инструмента для коррекции погрешности, предоставляющего возможность контроля искажений, вносимых металлом, при этом указанный инструмент для коррекции погрешности расположен поблизости от указанного медицинского устройства и содержит по меньшей мере три электромагнитных датчика, расположенных в заданной и фиксированной конфигурации; ! установление корректирующей функции из указанных данных результатов измерений местоположения от электромагнитных датчиков; ! применение указанной корректирующей функции к указанному мониторингу медицинского устройства, ...

Magnetic input and measurement device with six degrees of freedom

The device has two bodies which are movable wrt. each other and whose relative positions are determined so that a magnetic field is formed on one body which is measured at several points on the second body. The two mutually relatively movable bodies are joined together by elastically deformable components. Hall sensors or coils are used to measure the magnetic field.

System zur Bearbeitung eines Werkstücks

Die Erfindung betrifft ein System zur Bearbeitung eines Werkstücks (W),- mit einer Hand-Werkzeugmaschine (20), die einen Antriebsmotor (22), eine durch den Antriebsmotor (22) antreibbare Werkzeugaufnahme (24) für ein Arbeitswerkzeug (25) zur Bearbeitung des Werkstücks (W) und ein Führungselement (30) mit einer Führungsfläche (31) zum Führen der Hand-Werkzeugmaschine (20) an dem Werkstück (W) aufweist,- mit einer Markierungserfassungseinrichtung (70) zur Erfassung von Koordinatendaten (KD1, KD2) mindestens einer Werkstückmarkierung (M1, M2) des Werkstücks (W), wobei die Hand-Werkzeugmaschine (20) Führungsmittel (65) zum Führen des Arbeitswerkzeugs (25) entlang des Werkstücks (W) in Abhängigkeit von den Koordinatendaten (KD1, KD2) der mindestens einen Werkstückmarkierung (M1, M2) aufweist,Es ist vorgesehen, dass die Markierungserfassungseinrichtung (70) eine optische und/oder mechanische Referenz (71) aufweist, die auf und/oder unmittelbar neben der mindestens einen Werkstückmarkierung (M1 ...

VERFAHREN UND MAGNETISCHE VORRICHTUNG ZUR BESTIMMUNG DER ORIENTIERUNG

MESSEINRICHTUNG ZUM VOREINSTELLEN VON WERKZEUGEN IN WERKZEUGHALTERN

Anordnung von Spulen für die Bestimmung von Ort und Ausrichtung eines Magnetfeldsensors

Anordnung (1) von Spulen (2 bis 10) für die Bestimmung von Ort und Ausrichtung eines Magnetfeldsensors in einem an die Anordnung (1) angrenzenden Messraum (11), wobei die Spulen (2 bis 10) in einem kartesischen Koordinatensystem mit einem Ursprung (28) in dem Messraum (11) aufeinander abgestimmte Ortsvektoren (23, 26) ihrer Spulenmittelpunkte und Richtungsvektoren ihrer Spulenachsen (12 bis 20) aufweisen, dadurch gekennzeichnet, dass von den im Folgenden definierten neun Spulen (2 bis 10) mindestens sieben vorhanden sind: drei Zentralspulen (2 bis 4) mit zueinander orthogonalen Ortsvektoren (23, 26) und zueinander orthogonalen Richtungsvektoren, wobei der Richtungsvektor jeder Zentralspule (2 bis 4) orthogonal zu ihrem Ortsvektor (24, 26) verläuft, und sechs Satellitenspulen (5 bis 10), von denen jeweils zwei einer der Zentralspulen (2 bis 4) zugeordnet und in einander entgegen gesetzten, orthogonal zu dem Ortsvektor (23, 26) der zugehörigen Zentralspule (2 bis 4) verlaufenden Richtungen ...

EINRICHTUNG ZUR ABTASTUNG DER KOORDINATEN EINES SCHRIFTBILDES

POSITIONSMESSVORRICHTUNG

Magnetically suspended and plane-drove vibration isolator with zero stiffness whose angle degree of freedom is decoupled with a spherical air bearing

METHOD AND APPARATUS FOR ESTABLISHING THE POSITION OF A DATUM REFERENCE

IMPROVEMENTS RELATING TO ATTITUDINAL INFORMATION SYSTEMS

Touch sensor device

A touch sensor device includes first touch pads, each of which is connected with a first bar-type touch pattern and a second bar-type touch pattern by a plurality of bridges and is disposed in a first direction, the first and second bar-type touch patterns being connected with first and second channels at opposite ends thereof and third and fourth channels at opposite ends thereof respectively, second touch pads, each of which is connected with fifth and sixth channels at opposite ends thereof respectively and is disposed in a second direction perpendicular to the first direction, and a touch sensor sequentially applying reference signals to the second and fourth channels of the first touch pads, performing resistor-type and capacitor-type touch sensing using resistance and capacitance values varied depending on the touch location of a touch object, and generating touch location data corresponding to the touch location.

System and method for monitoring rotating device

A system for use in monitoring operation of a rotating device is described herein. The system includes at least one sensor, an input device, a display device, and a processor. The sensor is configured to sense a position of a component coupled to the rotating device, and to generate a signal indicative of the position of the component with respect to a reference. The input device is configured to generate a signal indicative of a user selection input. The processor is coupled in communication with the sensor, the input device, and the display device, and is programmed to calculate a plurality of timebased position values associated with a relative position of the component with respect to a predefined period of time. A plurality of orbital position values associated with a relative position of the component are calculated by the processor. The processor graphically presents at least one of a plurality of timebased traces corresponding to the calculated plurality of timebased position values and a plurality of orbit traces corresponding to the calculated plurality of orbital position values in response to a user selection input via said input device.

COORDINATE SENSING SYSTEM, COORDINATE SENSING METHOD AND DISPLAY SYSTEM

A coordinate sensing system includes a magnetic member, a direction sensor, a first magnetic sensor and a processor, wherein the processor communicates with the direction sensor and is electrically connected to the first magnetic sensor. The magnetic member has a magnetic dipole moment. The direction sensor is used for sensing a direction of the magnetic dipole moment. The first magnetic sensor is used for sensing a first magnetic field of the magnetic member. The processor is used for calculating a first distance between the magnetic member and the first magnetic sensor and calculating a direction of the first distance according to a value of the magnetic dipole moment, the direction of the magnetic dipole moment and the first magnetic field. The processor is further used for calculating a coordinate of the magnetic member according to the first distance and the direction of the first distance. 1. A coordinate sensing system comprising:a magnetic member having a magnetic dipole moment;a direction sensor for sensing a direction of the magnetic dipole moment;a first magnetic sensor for sensing a first magnetic field of the magnetic member; anda processor communicating with the direction sensor and electrically connected to the first magnetic sensor, the processor being used for calculating a first distance between the magnetic member and the first magnetic sensor and calculating a direction of the first distance according to a value of the magnetic dipole moment, the direction of the magnetic dipole moment and the first magnetic field, the processor being further used for calculating a coordinate of the magnetic member according to the first distance and the direction of the first distance.2. The coordinate sensing system of claim 1 , wherein when the direction of the magnetic dipole moment is parallel to a coordinate axis of a Cartesian coordinate system claim 1 , the direction sensor is a two-axis gyro.3. The coordinate sensing system of claim 1 , further ...

SENSOR OF ELECTROMAGNETIC INDUCTION TYPE COORDINATE INPUT DEVICE

In an electromagnetic induction type coordinate input device, on a substrate, plural first loop coils including loop portions are disposed in a first direction, and plural second loop are disposed in a second direction. The first and second loop coils include extraction line portions, each composed of a first line and a second line that are in parallel and are continuously connected to corresponding ones of the first and second loop coils. One of the first line or the second line of the first loop coil is connected to at least one of: (i) the first line or the second line of another one of the first loop coils, and (ii) a line of the loop portion of a second loop coil, within a position detection area, to form a common extraction line with (i) and/or (ii), to thereby reduce the overall number of extraction lines disposed on the substrate. 1. A sensor of an electromagnetic induction type coordinate input device , comprising:a first loop coil group, in which plural first loop coils are disposed in a first direction, each of the first loop coils including a first extraction line portion composed of a first line and a second line formed in parallel with each other, and a first loop portion continuously connected to the first and second lines of the first extraction line portion and having a shape that surrounds a predetermined area; anda second loop coil group, in which plural second loop coils are disposed in a second direction perpendicular to the first direction, each of the second loop coils including a second extraction line portion composed of a third line and a fourth line formed in parallel with each other, and a second loop portion continuously connected to the third and fourth lines of the second extraction line portion and having a shape that surrounds a predetermined area, wherein an area occupied by the first loop portions of the first loop coil group and the second loop portions of the second loop coil group define a position detection area, andwherein one ...

Package Management System For Tracking Shipment And Product Integrity

A product integrity tracking shipping label includes a label body for attaching to a product to be shipped or to packaging containing the product. One or more movement monitoring configured with the label body detects a movement metric of the product. A microprocessor configured with the label body and in communication with the one or more movement monitoring devices time-tags the movement metric when the movement metric exceeds a pre-selected threshold. A product integrity tracking system includes a movement monitoring device with one or more sensors for attachment to a product or packaging containing the product. The movement monitoring device senses at least one movement event during handling of the product. A processor compares the movement event with a pre-selected event threshold, and time-tags and stores above-threshold movement events in a memory. Information in the memory is readable via an interrogation device during shipment or at product delivery. 1. A package management system , comprising:shipping label having a sensor integrated therewith, the label being attachable to packaging, the sensor monitoring events experienced by the shipping label and having a communications port for communicating event data to external devices;and a receiver linked to a transportation channel traveled by the packaging, for communicating with the communications port of the sensor to determine whether the label is within the correct transportation channel.2. Package management system of claim 1 , the receiver also logging events from the sensor.3. Package management system of claim 1 , further comprising a wireless relay tower for communicating with the receiver so as to track location of the shipping label during shipment.4. Package management system of claim 3 , the relay tower and receiver determining location of the label during shipment claim 3 , so that the events are correlated to location.5. Package management system of claim 1 , further comprising an interrogation ...

Solenoid valve having a condition monitoring unit, and a method of condition monitoring a solenoid valve

A solenoid valve having a condition monitoring unit, and a method of condition monitoring this solenoid valve are specified. A core of the solenoid valve can be shifted with respect to a holding coil 4 and a measuring coil. A reading voltage is applied to the measuring coil, and the current intensity of a current flowing through the measuring coil is determined at a first and a second time. The first measuring is performed during a switching-on or switching-off operation of the current flowing through the measuring coil. The second measuring is performed when the current intensity of the current flowing through the measuring coil 6 has reached a stationary condition.

FLAT PANEL DISPLAY EMBEDDING OPTICAL IMAGING SENSOR

Discussed is a flat panel display device embedding an optical imaging sensor such as a fingerprint image sensor. The device includes: a display panel including a display area and a non-display area, and having a top surface; and a directional optical unit attached to the top surface of the display panel, the directional optical unit having a length along a length axis of the display panel, a width along a width axis of the display panel and a thickness along a thickness axis of the display panel, wherein the directional optical unit provides a sensing light to the display area, and wherein the sensing light is collimated and directionized along a predetermined direction of the directional optical unit. 1. A flat panel display device embedding an image sensor , the device comprising:a display panel including a display area and a non-display area, and having a top surface; anda directional optical unit attached to the top surface of the display panel, the directional optical unit having a length along a length axis of the display panel, a width along a width axis of the display panel and a thickness along a thickness axis of the display panel,wherein the directional optical unit provides a sensing light to the display area, andwherein the sensing light is collimated and directionized along a predetermined direction of the directional optical unit.2. The device according to claim 1 , wherein the directional optical unit includes:a light guide optical plate having a size corresponding to the length and the width of the directional optical unit;a light radiating film corresponding to the display area, the light radiating film positioned under the light guide optical plate;a light incident film positioned under the light guide optical plate and disposed outside of the display area adjacent to a lateral side of the light radiating film;a first low refractive layer disposed under the light radiating film and the light incident film, the first low refractive layer attached ...

Sensor Arrangement and Method for Operation of an Operating Device

A sensor arrangement comprises an input surface, an optical sensor, a first capacitive sensor, an evaluation unit and a device. The input surface has at least one light-permeable part surface. The optical sensor is disposed below the at least one light-permeable part surface. The first capacitive sensor is disposed below the input surface. The evaluation unit is coupled to the optical sensor and configured to carry out a light-permeability measurement of an object located on the input surface using the optical sensor. The device is configured to evaluate a change in capacitance of the first capacitive sensor. The device is connected to the first capacitive sensor and further configured to generate a first output signal if there is a change in capacitance. The evaluation unit is further configured to generate a presence signal if a measured light permeability falls below a predetermined value. 1. A sensor arrangement , comprising:an input surface having at least one light-permeable part surface;an optical sensor that is disposed below the at least one light-permeable part surface;a first capacitive sensor that is disposed below the input surface;an evaluation unit coupled to the optical sensor and configured to carry out a light-permeability measurement of an object located on the input surface using the optical sensor; anda device for evaluating a change in capacitance of the first capacitive sensor, wherein the device is connected to the first capacitive sensor and configured to generate a first output signal if there is a change in capacitance,wherein the evaluation unit is further configured to generate a presence signal if a measured light permeability determined falls below a predetermined value, andwherein, if the light permeability is determined to fall below the predetermined value, the evaluation unit is further configured to evaluate the first output signal and the presence signal and, if both signals are present, to generate a validity signal.2. The ...

Directional capacitive sensing means

A directional capacitive sensing means for sensing number, size, position and motion direction and/or speed of sensing objects, which comprises two or more proximity capacitive sensing means, an analysis means, the two or more proximity capacitive sensing means are arranged in two or more different positions that resulted in two or more sensing fields being formed, whereof a combination area forms a sensing space; the proximity capacitive sensing devices individually produce. an electric charge sensing information according to a change of the electric charge in the electric charge fields corresponding to sensed objects; the analysis means, which connects the proximity capacitive sensing means for receiving the electric charge sensing information, analyzes a directional information according to changes of distribution of the electric charge fields and strength of the corresponding electric charge sensing information; the directional information comprises number, size, motion direction and/or seed of the sensed objects.

Position estimation device, position estimation method, and integrated circuit

A position estimation device includes: a position estimation unit that estimates current position coordinates of the position estimation device; a pointing direction detection unit that detects a pointing direction pointed by a user using the position estimation device; a pointing target detection unit that detects a pointing target pointed by the user, based on the detected pointing direction; a concentration calculation unit that specifies, as a concentrated area, an area in which a position pointed in the detected pointing direction in a predetermined time period immediately before the pointing target is detected is included for at least a threshold time period and in which the pointing target is not present, and calculates a concentrated direction which is from the position of the position estimation device in the predetermined time period to the concentrated area; and a position correction unit that corrects the current position coordinates using the calculated concentrated direction.

LOW-FREQUENCY ELECTROMAGNETIC TRACKING

A medical system tracks the position of a medical instrument within a body of a patient. The medical instrument includes an electromagnet structure having an inductor coil wound around a core. A control circuit applies a low frequency excitation signal across the inductor coil. The inductor coil and the core generate a magnetic field. A plurality of sensors sense parameters of the generated magnetic field and produce sensor signals. The control circuit calculates the position of the medical instrument based on the produced sensor signals. 1. A system , comprising: a core; and', 'an inductor coil wound around the core;, 'a medical instrument configured to be inserted in a body of a patient, the medical instrument includinga control circuit configured to pass a current through the inductor coil by applying an excitation signal to the inductor coil, the excitation signal having a frequency below 10,000 Hz, the inductor coil and the core being configured to generate a magnetic field based in part on the current; anda sensor configured to sense the magnetic field and to output to the control circuit a sensor signal based on the magnetic field, the control circuit further configured to calculate position information associated with the medical instrument within the body of the patient based on the sensor signal.2. The system of claim 1 , wherein the frequency is less than 500 Hz.3. The system of claim 2 , wherein the frequency is about 330 Hz.4. The system of claim 1 , wherein the medical instrument includes a tube.5. The system of claim 4 , wherein the tube is a catheter.6. The system of claim 1 , wherein the medical instrument includes a medical implant configured to be permanently implanted within the patient.7. The system of claim 1 , wherein the position information includes information representing a three-dimensional position of the medical instrument claim 1 , an orientation of the medical instrument claim 1 , and motion of the medical instrument.8. The system of ...

Systems and Methods for Computing a Position of a Magnetic Target

Systems and methods for sensing position of a magnetic target are disclosed. In embodiments, three magnetic field sensing elements are arranged equidistantly from each other to define a plane and a central axis perpendicular to the plane. The magnetic field sensing elements are configured to generate a respective output signal representing proximity of a magnetic target that is proximate to the central axis and capable of moving relative to the central axis. A processor circuit is coupled to receive output signals from each of the sensors and configured to calculate a position of the magnetic target relative to the plane. 1. A system comprising:exactly three magnetic field sensing elements arranged about a central axis to define a plane perpendicular to the central axis, the magnetic field sensing elements each configured to generate a respective output signal representing respective proximity of a magnetic target, wherein the magnetic target is proximate to the central axis and capable of moving relative to the central axis; anda processor circuit coupled to receive output signals from each of the sensors and configured to calculate a position of the magnetic target relative to the plane.2. The system of wherein the magnetic target comprises a pivotal member claim 1 , or is coupled to a pivotal member claim 1 , the pivotal member configured to move the magnetic target.3. The system of wherein the pivotal member has a pivot point on the central axis.4. The system of wherein the pivotal member comprises an elongate member that claim 2 , in the absence of an external force claim 2 , returns to a position parallel to the central axis.5. The apparatus of wherein the pivotal member comprises a joystick lever.6. The system of wherein the processor circuit provides the position of the magnetic target by providing an X coordinate and a Y coordinate representing a position within the plane.7. The apparatus of wherein the processor provides the position of the magnetic target ...

FLEXIBLE GAUGE CELL

A workstation for measuring dimensions includes an operator zone, a first fixture, a second fixture, a component delivery device, a gauge, and a collaborative robot. The second fixture is accessible to an operator in the operator zone. A component delivery device deposits a first component onto the first fixture. The envelope of the component delivery device is not accessible by the operator in the operator zone. The collaborative robot supports the gauge tool and has a range of motion capable of measuring the first component on the first fixture and a second component on the second fixture. A control module is in communication with the gauge and the collaborative robot and operates the collaborative robot to measure the first component on the first fixture and the second component on the second fixture. 1. A workstation for measuring dimensions comprising:an operator zone;a first fixture configured to support a first component;a second fixture configured to support a second component, the second fixture being accessible to an operator located in the operator zone such that the operator can access the second component on the second fixture from the operator zone;a component delivery device arranged to move the first component and deposit the first component onto the first fixture, wherein no moving part of the component delivery device or the first component is accessible by the operator while the operator is located in the operator zone;at least one gauge tool;a collaborative robot including an end effector, the end effector configured to support the at least one gauge tool, the collaborative robot having a range of motion capable of moving the at least one gauge tool to measure the first component on the first fixture and the second component on the second fixture; anda control module in communication with the at least one gauge tool and the collaborative robot and configured to operate the collaborative robot to move the at least one gauge tool to measure the ...

METHOD FOR CONTACTLESSLY MEASURING A RELATIVE POSITION BY MEANS OF A 3D HALL SENSOR HAVING MEASUREMENT SIGNAL STORE

The present invention relates to a method for contactlessly measuring a relative position of a magnetic field source () which produces a magnetic field and a magnetic field sensor () in relation to each other. The present invention further also relates to a corresponding displacement sensor. The invention describes an operating principle of a sensor which is based on the Hall effect and which achieves an increase in the sensor output range with a magnet which is simultaneously reduced in size by storing the earlier value when control by the magnetic field is lost. In particular, the method comprises the steps of: calculating the position signal on the basis of a quotient of two magnetic flux density components; calculating a magnitude of the magnetic flux density and comparing the magnitude with a predetermined threshold value; outputting the current calculated position signal if the magnitude of the magnetic flux density is higher than the threshold value; outputting a preceding stored position signal if the magnitude of the magnetic flux density is smaller than or equal to the threshold value; storing the output position signal. 111-. (canceled)12. A method for contactlessly measuring a relative position of a magnetic field source which produces a magnetic field and a magnetic field sensor in relation to each other ,wherein the magnetic field source and the magnetic field sensor are movable relative to each other,wherein the magnetic field sensor detects at least two spatial components (By, Bz) of a magnetic flux density of the magnetic field and a position signal is produced from the measured components, and wherein the method comprises the following steps:calculating the position signal on the basis of a quotient of the two magnetic flux density components,calculating a magnitude of the magnetic flux density and comparing the magnitude with a predetermined threshold value,outputting the current calculated position signal if the magnitude of the magnetic flux ...

Micropositioning Device With Multidegrees Of Freedom For Piezoelectric Actuators And Associated Method

A micropositioning device for a piezoelectric actuator includes a means for controlling an electric field applied to the piezoelectric actuator so as to deform the piezoelectric material, and means for simultaneous measurement of a variation of electric charge accumulated on the piezoelectric actuator resulting from the deformation; and means for acquiring measurements of the variation of electric charge, for processing these acquisitions and for estimating a displacement (x, y, z) of the piezoelectric actuator and/or an applied force. 112-. (canceled)13. A micropositioning device for a piezoelectric actuator that includes at least one piezoelectric material capable of deforming when it is subjected to an electric field , the device comprising:means for controlling an electric field applied to the piezoelectric actuator so as to deform the piezoelectric material, andmeans for simultaneously measuring a variation in electric charge accumulated on the piezoelectric actuator as a result of the deformation; and a voltage generator connected in parallel to a divider bridge being composed of a first resistor and a second resistor in series, and to a first capacitor connected in series with the piezoelectric actuator,', 'a charge amplifier having a first input connected to a node between the two resistors, forming a virtual ground at floating high potential, and a second input connected to a node between the first capacitor and the piezoelectric actuator., 'means for acquiring measurements of the electric charge variation, for processing these acquisitions and for estimating a displacement (x, y, z) of the piezoelectric actuator and/or an applied force on the basis of the measurement of the variation in electric charge accumulated on the piezoelectric actuator, wherein the means for controlling and the means for measuring further comprises14. The micropositioning device of claim 13 , wherein the piezoelectric actuator comprises at least three electrodes claim 13 , ...

Particle Emission Tomography

The present invention provides autoradiography methods and systems for imaging via the detection of alpha particles, beta particles, or other charged particles. Embodiments of the methods and systems provide high-resolution 3D imaging of the distribution of a radioactive probe, such as a radiopharmaceutical, on a tissue sample. Embodiments of the present methods and systems provide imaging of tissue samples by reconstruction of a 3D distribution of a source of particles, such as a radiopharmaceutical. Embodiments of the methods and systems provide tomographic methods including microtomography, macrotomography, cryomicrotomography and cryomacrotomography. 1. A method for reconstructing a 3D distribution of a source of particles , the method comprising the steps of:providing the source of particles from within a tissue sample, wherein the particles comprise beta particles, alpha particles, positrons, or conversion electrons; detecting the particle with a particle-processing detector;', (i) a two dimensional position corresponding to an interaction point where the particle interacts with the particle-processing detector; and', '(ii) an energy that is deposited in the particle-processing detector by the particle; and, 'determining attributes of the particle; wherein the attributes include at least one of, 'storing the attributes of the particle;, 'repeating, for each of a plurality of the particles from the source, the steps ofthereby generating attributes for each of the plurality of particles from the source; andreconstructing the 3D distribution of the source of particles using at least a portion of the attributes for each of the plurality of particles.2. The method of claim 1 , wherein the particle is emitted upon radioactive decay occurring in the tissue to be imaged claim 1 , and has an initial energy that is known.3. The method of claim 1 , wherein the particle is emitted upon radioactive decay occurring in the tissue to be imaged claim 1 , and has an initial ...

METHOD AND DEVICE FOR LOCATING A MAGNETIC OBJECT

A method for locating a moving magnetic object, comprising: determining the position or the orientation of the magnetic object from measurements of an array of N (an integer greater than 5) tri-axial magnetometers mechanically linked to one another with no degree, the method also comprises the reiteration of the following steps. Estimating the position of the magnetic object relative to the array of magnetometers from measurements of the magnetometers made in a preceding iteration or from a measurement of a sensor distinct from the magnetometers of the array of magnetometers so that this estimation is obtained before making a new measurement using the magnetometers of the array; computing the distance between each magnetometer and the estimated position of the magnetic object; eliminating the Ni magnetometers closest to this estimated position, where Ni is a positive integer number strictly less than N; making a new measurement, by each non-eliminated magnetometer, of the magnetic field generated or modified by the magnetic object; and determining a new position or a new orientation of the magnetic object from the new measurements of the magnetometers which have not been eliminated and without taking into account new measurements made by the eliminated magnetometers, so as to obtain a new location of the magnetic object. 1. A method for locating a moving magnetic object , this method comprising: determining the position or of the orientation of the magnetic object from measurements of an array of tri-axial magnetometers , the array comprising N tri-axial magnetometers mechanically linked to one another with no degree of freedom to retain a known distance between each of said magnetometers , where N is an integer number greater than five , and a) estimating the position of the magnetic object relative to the array of magnetometers from measurements of the magnetometers made in a preceding iteration or from a measurement of a sensor distinct from the magnetometers of ...

Method and Device for Sensorless Control of a Separately Excited Synchronous Machine

A method for sensorless control of a separately excited synchronous machine having a rotor includes the following steps: feeding a test signal on a parameter of an electrical current driving the rotor; measuring the parameter of the electrical current driving the rotor on an axis of the coordinate system describing the synchronous machine; determining an error signal by correlating the measured parameter of the electrical current driving the rotor with a temporally delayed test signal which is determined from the fed test signal; and adjusting a rotor angle as a reaction to the error signal if the error signal has a value not equal to zero. 1. A method for sensorless control of a separately excited synchronous machine having a rotor , the method comprising:feeding a test signal into a characteristic variable of an electrical current driving the rotor;measuring the characteristic variable of the electrical current driving the rotor on an axis of a coordinate system describing the synchronous machine;determining an error signal by correlating the measured characteristic variable of the electrical current driving the rotor with a temporally delayed test signal determined from the test signal that has been fed in; andadapting a rotor angle based on the determined error signal in response to determining that the error signal has a value that is not equal to zero.2. The method of claim 1 , wherein the test signal is a PRBS signal.3. The method of claim 1 , wherein the coordinate system describing the synchronous machine is a dq coordinate system which is fixed with respect to the rotor.4. The method of claim 1 , wherein the coordinate system describing the synchronous machine is an αβ coordinate system which is fixed with respect to the stator.5. The method of claim 1 , comprising determination of the error signal by continuously multiplying and integrating the measured characteristic variable of the electrical current driving the rotor with the test signal which has been ...

SENSING METHOD AND SENSING APPARATUS FOR SENSING ELECTRODE CLUSTER

A sensing method for a sensing electrode cluster is provided. The sensing electrode cluster includes a plurality of groups, each comprising a plurality of bars. The sensing method includes scanning each of the groups according to a first scanning sequence, and scanning each of the groups according to a second scanning sequence, and determining a sensing position according to the first position and the second position. The first scanning sequence is different from the second scanning sequence. 1. A sensing method for a sensing electrode cluster , the sensing electrode cluster comprising a plurality of groups , each comprising a plurality of bars , the sensing method comprising:scanning each of the groups according to a first scanning sequence to generate a first position;scanning each of the groups according to a second scanning sequence to generate a second position; anddetermining a sensing position according to the first position and the second position;wherein the first scanning sequence is different from the second scanning sequence.2. The sensing method according to claim 1 , wherein the first scanning sequence is a reverse sequence of the second scanning sequence.3. The sensing method according to claim 1 , wherein each of the group comprises a plurality of electrodes at two sides claim 1 , and the step of scanning according to the first scanning sequence and the second scanning sequence comprises respectively performing scanning on the electrodes at different sides in a staggered manner according to the first scanning sequence and the second scanning sequence claim 1 ,4. The sensing method according to claim 3 , wherein the first scanning sequence and the second scanning sequence comprise a plurality of steps claim 3 , each comprising scanning a plurality of electrodes at one side claim 3 , and each two sequential steps scanning the plurality of electrodes at the same side comprises scanning at least one same electrode.5. The sensing method according to claim ...

IMAGE CAPTURE DEVICE WITH A CALIBRATION FUNCTION AND CALIBRATION METHOD OF AN IMAGE CAPTURE DEVICE

An image capture device includes at least one image capture unit and a calibration unit. A calibration method of the image capture device includes an image capture unit of the at least one image capture unit capturing a first image, the calibration unit executing a global calibration operation on original coordinates of all image points of the first image to generate first rectification coordinates of the all image points, the calibration unit finding a geometric graph including each image point of at least one image point of the all image points according to first rectification coordinates of the each image point of the at least one image point of the all image points, and the calibration unit rectifying the first rectification coordinates of the each image point to second rectification coordinates of the each image point according to a rectification equation corresponding to the geometric graph. 1. A calibration method of an image capture device , whereinthe image capture device comprises at least one image capture unit and a calibration unit, the calibration method comprising:capturing a first image by an image capture unit of the at least one image capture unit;executing a global calibration operation on original coordinates of all image points of the first image by the calibration unit to generate first rectification coordinates of the all image points of the first image;finding a geometric graph comprising each image point of at least one image point of the all image points according to first rectification coordinates of the each image point of the at least one image point of the all image points by the calibration unit; andrectifying the first rectification coordinates of the each image point of the at least one image point of the all image points to second rectification coordinates of the each image point of the at least one image point of the all image points according to a rectification equation corresponding to the geometric graph by the calibration unit. ...

Sensor System

A system, comprising an optical component that, in operational use of the optical component, optically interacts with a laser beam, an electrically conductive element disposed on or within the optical component that, in operational use of the optical component, is exposed to the laser beam, and a monitoring system operative to monitor a physical quantity representative of an electrical resistance of the electrically conductive element and to determine based on the physical quantity, a position of the laser beam relative to the optical component. 120-. (canceled)21. A system , comprising;an optical component located in a path of a laser beam; and an electrically conductive element disposed at the optical component, wherein during use of the system the laser beam is incident on the electrically conductive element; and', a position of the laser beam relative to the optical component; and', 'a temperature of the optical component., 'a monitoring system operative to monitor a physical quantity representative of an electrical resistance of the electrically conductive element and to determine, based on the physical quantity, at least one selected from the list comprising], 'a sensor system, comprising22. The system of claim 21 , further comprising a positional control system operative to determine an adjustment to be made to operation of a further component based on the physical quantity.23. The system of claim 22 , wherein the further component is a component of at least one of a laser system configured to generate the laser beam or a beam delivery system configured to deliver the laser beam to a predetermined site24. The system of claim 22 , wherein the positional control system is operative to control the further component to adjust the position of the laser beam relative to the optical component based on the physical quantity.25. The system of claim 24 , wherein the positional control system is operative to adjust a spatial attribute of the optical component or a ...

TECHNIQUES FOR REDUCING POWER CONSUMPTION IN MAGNETIC TRACKING SYSTEM

The devices and methods for sending reduced power signals include transmitting a first magnetic signal to a remote device, receiving a first position data from the remote device based on the first magnetic signal, wherein the first position data indicates a first position of the remote device relative to the local device, receiving an indication signal indicating a rapid movement, wherein the rapid movement includes a velocity or an acceleration of the remote device achieving a threshold, transmitting a reduction signal indicating a reduction in a first power of the first magnetic signal in response to receiving the indication signal, transmitting a second magnetic signal based on transmitting the reduction signal, wherein the second magnetic signal has a second power lower than the first power, and receiving a second position data from the remote device based on the second magnetic signal, wherein the second position data indicates a second position of the remote device relative to the local device. 1. A method of sending reduced power signals using a local device , comprising:transmitting a first magnetic signal to a remote device;receiving a first position data from the remote device based on the first magnetic signal, wherein the first position data indicates a first position of the remote device relative to the local device;receiving an indication signal indicating a rapid movement, wherein the rapid movement includes a velocity or an acceleration of the remote device achieving a threshold;transmitting a reduction signal indicating a reduction in a first power of the first magnetic signal in response to receiving the indication signal;transmitting a second magnetic signal based on transmitting the reduction signal, wherein the second magnetic signal has a second power lower than the first power; andreceiving a second position data from the remote device based on the second magnetic signal, wherein the second position data indicates a second position of the ...

APPARATUS FOR ACQUIRING LOCATION COORDINATES OF OBJECT USING TWO MEASUREMENT HEADS AND METHOD USING THE SAME

Disclosed herein are an apparatus for acquiring the location coordinates of an object to be measured using two measurement heads and a method using the apparatus. The apparatus for acquiring the location coordinates of an object includes two measurement heads for individually detecting a signal corresponding to the object to be measured, a measurement head fixing unit for placing the two measurement heads so as to face each other with the object therebetween, a rotatable structure for rotating the measurement head fixing unit, and a location determination unit for acquiring the location coordinates of the object to be measured based on the strengths of the two detection signals detected by the measurement heads. 1. An apparatus for acquiring location coordinates of an object to be measured using two measurement heads , comprising:two measurement heads for individually detecting a signal corresponding to the object to be measured;a measurement head fixing unit for placing the two measurement heads so as to face each other with the object to be measured therebetween;a rotatable structure for rotating the measurement head fixing unit; anda location determination unit for acquiring the location coordinates of the object to be measured based on strengths of two detection signals detected by the measurement heads.2. The apparatus of claim 1 , wherein the location determination unit is configured to:calculate a radius corresponding to polar coordinates of the object to be measured based on a circle generated by the rotation; andacquire the location coordinates by converting the polar coordinates into Cartesian coordinates based on the radius corresponding to the polar coordinates and an angle by which the measurement head fixing unit rotates.3. The apparatus of claim 2 , wherein the location determination unit is configured to:calculate a first distance, which is a length between the object to be measured and a first measurement head, and a second distance, which is a ...

COMPACT 3D DIRECTION FINDER

An apparatus that includes two non-coinciding arrangements disposed in an two axes Cartesian coordinate system such that each arrangement having a non-zero projection on a respective axis from among the two axes. Each one of the arrangements includes a pair of oppositely directed, spaced apart, co-axial radiating-capable elements, each of the elements being hollow with internal space, and being slotted throughout its entire extent. A first circuitry coupled to the arrangement and being configured to sense an electric field projection along the axis and to convey it to a first feeding terminal. A second circuitry coupled to a slot of the arrangement and being configured to sense a magnetic field's projection along said axis and to convey it to a first feeding terminal. 1. An apparatus , comprising:at least two non-coinciding arrangements disposed in an at least two axes Cartesian coordinate system such that each arrangement having a non-zero projection on a respective axis from among said at least two axes;each one of said arrangements includes at least one pair of oppositely directed, spaced apart, co-axial radiating-capable elements, each of said elements being hollow with internal space, and being slotted throughout its entire extent;a first circuitry coupled to said arrangement and being configured to sense an electric field projection along said axis and to convey it to a first feeding terminal;a second circuitry coupled to at least one slot of said arrangement configured to sense a magnetic field's projection along said axis and to convey it to a first feeding terminal,wherein said second circuitry includes passive elements,wherein said passive elements include at least one magnetic element accommodated within the spaces of said at least one pair of elements and extending along a major portion of the elements' longitudinal extent,wherein said magnetic element includes a multi-turn loop over a ferrite rod; andwherein the multi turn loop over ferrite rod is ...

Very narrow probe with coil

In one embodiment, a probe apparatus includes a shaft having a distal end, a tube containing separate powder granules of a ferrite, the tube being fixed to the distal end of the shaft, a coil disposed around the tube, and electrical wires connected to the coil so as to read out a signal generated across the coil due to an externally-applied magnetic field.

DIRECTED EMITTER/SENSOR FOR ELECTROMAGNETIC TRACKING IN AUGMENTED REALITY SYSTEMS

An electromagnetic tracking system includes a hand held controller including an electromagnetic emitter configured to generate an electromagnetic field characterized by an electromagnetic field pattern and a first electromagnetic reflector positioned adjacent the electromagnetic emitter and configured to form a modified electromagnetic field pattern. The electromagnetic tracking system also includes a head mounted augmented reality display including an electromagnetic sensor configured to sense the electromagnetic field and a second electromagnetic reflector adjacent to sensor configured to optimally sense electromagnetic field pattern in a region of interest. 1. An electromagnetic tracking system comprising: an electromagnetic emitter configured to generate an electromagnetic field characterized by an electromagnetic field pattern; and', 'a first electromagnetic reflector positioned adjacent the electromagnetic emitter and configured to form a modified electromagnetic field pattern;, 'a hand held controller including an electromagnetic sensor configured to sense the modified electromagnetic field pattern; and', 'a second electromagnetic reflector adjacent to the electromagnetic sensor configured to sense the modified electromagnetic field pattern in a region of interest., 'a head mounted augmented reality display including2. The electromagnetic tracking system of further comprising a controller operable to:control timing of electromagnetic emission and sensing; anddigitally compute a position and orientation of the electromagnetic emitter and the electromagnetic sensor based on the modified electromagnetic field pattern.3. The electromagnetic tracking system of further comprising an auxiliary unit including the controller.4. The electromagnetic tracking system of wherein the auxiliary unit comprises a belt pack.5. The electromagnetic tracking system of wherein the controller is distributed between the hand held controller claim 3 , the head mounted augmented ...

DISPLACEMENT SENSOR FOR CONTACTLESSLY MEASURING A POSITION BY MEANS OF A PLURALITY OF MAGNETIC FIELD SENSORS ARRANGED IN SERIES

The present invention relates to a displacement sensor for contactlessly measuring a position of a magnet relative to a reference point. The displacement sensor comprises the magnet which can be displaced along a movement axis, a plurality of magnetic field sensors which are arranged in series and which are arranged parallel with the movement axis of the magnet and a calculation unit for forming a position signal which indicates the position of the magnet relative to the reference point. The plurality of magnetic field sensors which are arranged in series are arranged in such a manner that the displacement measurement ranges of adjacent magnetic field sensors overlap in an overlap range. The calculation unit is constructed in such a manner that, if the position of the magnet is contained in an overlap range, it forms the position signal on the basis of output signals which are output by the magnetic field sensors whose displacement measurement ranges overlap in the overlap range; and, if the position of the magnet is not contained in an overlap range, it forms the position signal on the basis of the output signal which is output by the magnetic field sensor, in the displacement measurement range of which the magnet is located. The overlap range between two displacement measurement ranges of adjacent magnetic field sensors is selected in such a manner that the total error of the position signal formed by the calculation unit in that overlap range is smaller than a maximum tolerable error. 118-. (canceled)19. A Displacement sensor for contactlessly measuring a position of a magnet relative to a reference point , which comprises:the magnet which can be displaced along a movement axis,a plurality of magnetic field sensors which are arranged in series and which are arranged parallel with the movement axis, anda calculation unit for forming a position signal which indicates the position of the magnet relative to the reference point,with each magnetic field sensor having a ...

Tamper detection through magnetic sensing

Technologies are described herein for using magnetic sensing to detect tampering with a meter. A magnetic field created by a rotating magnet in the meter is measured. Whether the magnetic field is below a removal threshold is determined. Upon determining that the magnetic field is below the removal threshold, a register removal tamper alert is provided.

CORRECTING AND/OR PREVENTING ERRORS DURING THE MEASUREMENT OF COORDINATES OF A WORKPIECE

An arrangement measures coordinates of a workpiece and/or machines the workpiece. The arrangement has a first part and a second part that can be moved relative to the first part. The relative mobility of the first and second parts is specified in addition to a possible mobility of a probe that is optionally additionally fixed to the arrangement. The mobility of the probe is specified by a deflection of the probe from a neutral position during a mechanical probing of the workpiece for the purpose of measuring the coordinates. A measuring body is arranged on the first or second part, and at least one sensor is arranged on the other part, i.e. on the second or first part. The sensor generates a measurement signal corresponding to a position of the measuring body and thus corresponding to the relative position of the first and second part. 115-. (canceled)16. A configuration , comprising:a rotational device for measuring coordinates of a workpiece via a coordinate measuring machine and/or for machining the workpiece, said rotational device containing a first part and a second part having rotational mobility about a rotational axis relative to said first part, one of said first part or said second part configured either to hold the workpiece or to hold a probe for sensing the workpiece, a probe head of the coordinate measuring machine or a coordinate measuring apparatus of the coordinate measuring machine;a plurality of sensors;a measuring body assigned to each of said sensors and being defined as an assigned measuring body, wherein what applies to each of said sensors and to said assigned measuring body is that said assigned measuring body is disposed on one of said first part or said second part and said sensors are disposed on the other of said first part or said second part, each of said sensors generating a measurement signal corresponding to a position of said assigned measuring body and hence corresponding to a relative position of said first part and said second ...

Method, sensor, and printed circuit board for sensing position or motion of a shaft

The present disclosure presents a method, a sensor comprising printed circuit board (PCB), and a sensor PCB for a capacitive sensor for sensing position or motion of a shaft comprising an electrically conducting part. The method and the sensor utilise the sensor PCB that comprises a mounting hole through which the conducting part of the shaft can be mounted, at least one capacitor electrode formed to the printed circuit board, wherein an electrode surface of the electrode extends parallel to a center axis of the mounting hole and faces the center axis.

DETECTING POSITIONS OF A DEVICE BASED ON MAGNETIC FIELDS GENERATED BY MAGNETIC FIELD GENERATORS AT DIFFERENT POSITIONS OF THE DEVICE

A wearable device (such as a glove or other control adapted to be worn on a portion of a body) includes multiple magnetic field generators at various locations on the wearable device and a magnetic flux sensor at a predetermined position relative to the wearable device. A position determines spatial positions of locations of the wearable device based on magnetic fields generated by various magnetic field generators and detected by the magnetic flux sensor. In some embodiments, the magnetic field generators have known positions relative to each other. Additionally, each magnetic field generator may generate a magnetic field in response to an input signal having a particular attribute, allowing the magnetic flux sensor to identify magnetic fields generated by different magnetic field generators. 1. A device comprising:a plurality of magnets located at particular locations on the device, each magnet configured to generate a magnetic field in response to receiving an input signal;a magnetic flux sensor located at a predetermined positioned relative to the device and configured to detect a strength and a direction of the magnetic field generated by each magnet and configured to generate an output signal based on the detected strength and the detected direction of the magnetic field of each of the plurality of magnets; anda position analyzer coupled to the magnetic flux sensor, the position analyzer configured to determine spatial vectors representing a position of each magnet relative to the magnetic field sensor, the position of the magnet relative to the magnetic field sensor based on the output signal generated by the magnetic flux sensor based on the detected strength and the detected magnetic field of the magnet.2. The device of claim 1 , wherein the plurality of magnets comprises a plurality of electromagnets.3. The device of claim 2 , wherein each electromagnet receives an input signal having a different frequency.4. The device of claim 3 , wherein the magnetic ...

Method and Apparatus for Measuring Location of User Terminal Using Magnetic Field

A method for measuring a location of a user terminal, using a magnetic field includes receiving information on a map of the magnetic field; acquiring a first measured value from a magnetic field sensor provided in the user terminal; acquiring a second measured value from another sensor provided in the user terminal and distinguished from the magnetic field sensor; and measuring a location of the user terminal based on the information on the map of the magnetic field, the first measured value and the second measured value. 1. A method for measuring a location of a user terminal , using a magnetic field comprising:receiving information on a map of the magnetic field;acquiring a first measured value from a magnetic field sensor provided in the user terminal;acquiring a second measured value from another sensor provided in the user terminal and distinguished from the magnetic field sensor; andmeasuring a location of the user terminal based on the information on the map of the magnetic field, the first measured value and the second measured value.2. The method of measuring the location of the user terminal claim 1 , using the magnetic field claim 1 , according to claim 1 , wherein the sensor distinguished from the magnetic field sensor comprises one or more of an acceleration sensor claim 1 , an inertia sensor claim 1 , a gyro sensor claim 1 , a pressure sensor claim 1 , a ultrasonic sensor claim 1 , a temperature-humidity sensor claim 1 , an infrared sensor claim 1 , a UWB (Ultra-Wideband) sensor claim 1 , Wi-Fi (Wireless Fidelity) sensor or a LED (Light Emitting Diode) sensor.3. The method of measuring the location of the user terminal claim 1 , using the magnetic field claim 1 , according to claim 1 , wherein the information on the map of the magnetic field sensor is set based on horizontal components and vertical components of a magnetic field which are collected corresponding to preset coordinate information from one or more of the user terminal and a magnetic field ...

ELECTRONIC INDUCTION TYPE SENSOR PANEL AND METHOD FOR REDUCING INDICATION ERROR

To reduce an indication error at a peripheral part of an electromagnetic induction type coordinate detection device, sensor coils having a coil width of 21 pitches are arranged at a central part at intervals of 4 pitches. At a peripheral part, the coil width is shortened from sensor coil #5 to coil #1 sequentially so that the coil width of a sensor coil is shorter than a coil width of an inwardly adjacent sensor coil by 2 pitches. This enables the coil side pitch that is 1 all over the coil group , and an area enabling three-point supplementing can be enlarged from the conventional one. The sensor coils at the peripheral part have a coil pitch of 3, and so an indication error there can be reduced compared with the conventional case of coil pitch of 4 for two-point supplementing as well. Dummy wires required at the peripheral part conventionally can be eliminated. 1. A sensor panel capable of being mounted at a coordinate detection device configured to output coordinates of a position indicator based on electromagnetic induction , the sensor panel including a coil array having a plurality of loop-like sensor coils , comprising:a first sensor coil group including a plurality of sensor coils having a same coil width, the first sensor coil group being disposed at a central part of the coil array to have a predetermined coil side pitch; anda second sensor coil group including a plurality of sensor coils having a coil width narrower than the coil width of the first sensor coil group, the second sensor coil group being disposed at a peripheral part of the coil array.2. The sensor panel of claim 1 , wherein the second sensor coil group defines a coil side pitch equal to the predetermined coil side pitch.3. The sensor panel of claim 1 , wherein the sensor coils making up the second sensor group have coil widths that are shortened gradually from an inside to an outside of the coil array.4. The sensor panel of claim 1 , wherein claim 1 , in a sensor coil making up the first ...

POSITION DETECTION DEVICE

A position detection device detects a current positon of a operation member among positions including a predetermined position and includes a detection system that includes a part to be detected and 3N magnetic sensors S. The operation member can move to the positions in N (≥3) different directions from the predetermined position. Movement of the operation member between the predetermined position and another position cause outputs from three of the magnetic sensors to be switched. The magnetic sensors of which outputs are switched by a movement of the operation member between the predetermined position and a first position are all different from the magnetic sensors of which outputs are switched by a movement of the operation member between the predetermined position and a second position. 1. A position detection device configured to detect a current position of an operation member , the operation member being to be moved between a predetermined position and any one of N positions located in N directions different from each other , the current position being one of the predetermined position and one of the N positions , N being an integral number equal to or greater than three , the N positions including a first position , and a second position different from the first position ,the position detection device comprising a detection system that includes:a part to be detected; and3N detectors each having a resolution of one bit that indicates one of two different values according to a positional relationship of the each of the 3N detectors with respect to the part to be detected,wherein the 3N detectors includes three of first detectors and three of second detectors each different from each of the three of first detectors,each of the three of first detectors is configured to switch an output between the two different values upon movement of the operation member between the predetermined position and the first position, andeach of the three of second detectors is ...

Position indicator and capacitor

A position indicator includes a resonance circuit housed in a casing and having an inductance element and a capacitor variable in capacitance, such that the resonance circuit resonates at a predetermined frequency. The position indicator is electromagnetically coupled to a position detecting device. The capacitor includes a dielectric, an electrode disposed on one side of the dielectric, and a trimming electrode disposed on another side of the dielectric such that at least one part of a region of the trimming electrode is opposed to the electrode with the dielectric interposed in between, to form the capacitance of the capacitor. The capacitor is housed in the casing such that the at least one part can be exposed from the casing. The area of the at least one part exposed from the casing to the outside is changed so as to correspond to a resonance frequency desired for the resonance circuit.

SYSTEMS AND METHODS FOR MAGNETIC INTERFERENCE CORRECTION

Navigation systems and methods for magnetic interference correction involve antennae that generate magnetic fields at different frequencies, sensors that measure the magnetic fields, and a computing device that uses sensor measurements to determine the magnetic interference and produce accurate sensor position and orientation information. 1. A navigation system for magnetic interference correction , comprising:a plurality of antennae configured to generate a plurality of magnetic fields at different frequencies;a plurality of sensors configured to measure the plurality of magnetic fields; and obtain first magnetic field vector measurements from the plurality of sensors for a portion of the plurality of antennae;', 'evaluate predetermined functions using the first magnetic field vector measurements to obtain first position and orientation information for the plurality of sensors;', 'obtain second magnetic field vector measurements from the plurality of sensors for the plurality of antennae; and', 'search, starting with the first position information, a simulated map for position information of the plurality of sensors such that the difference between (a) the sum of simulated magnetic field vectors corresponding to the position information and interference magnetic field vectors, which is rotated according to orientation information, and (b) the second magnetic field vector measurements are minimized., 'a computing device configured to2. The navigation system of claim 1 , wherein the plurality of sensors includes three patient sensors.3. The navigation system of claim 2 , wherein the plurality of sensors further includes a catheter sensor.4. The navigation system of claim 1 , wherein determining the plurality of interference magnetic field vectors includes determining three coordinates of an interference magnetic field vector for each of the plurality of sensors at one frequency of a magnetic field generated by one antenna of the plurality of antennae and determining ...

Calibrating a Magnetic Transmitter

A calibration device comprising: a plurality of magnetic sensors positioned at the calibration device, the plurality of magnetic sensors defining a space; a controller configured to be positioned in the space defined by the plurality of magnetic sensors, wherein the controller includes a magnetic transmitter; and one or more processors configured to: cause the magnetic transmitter to generate magnetic fields; receive signals from the plurality of magnetic sensors that are based on characteristics of the magnetic fields received at the plurality of magnetic sensors; calculate, based on the signals received from the plurality of magnetic sensors, positions and orientations of the plurality of magnetic sensors relative to a position and orientation of the magnetic transmitter; and determine whether the calculated positions and orientations of the plurality of magnetic sensors are within one or more threshold limits of known positions and orientations of the plurality of magnetic sensors. 1a plurality of magnetic sensors positioned at the calibration device, the plurality of magnetic sensors defining a space;a controller configured to be positioned in the space defined by the plurality of magnetic sensors, wherein the controller includes a magnetic transmitter; and cause the magnetic transmitter to generate a plurality of magnetic fields;', 'receive signals from the plurality of magnetic sensors that are based on characteristics of the plurality of magnetic fields received at the plurality of magnetic sensors;', 'calculate, based on the signals received from the plurality of magnetic sensors, positions and orientations of the plurality of magnetic sensors relative to a position and orientation of the controller and the magnetic transmitter; and', 'determine whether the calculated positions and orientations of the plurality of magnetic sensors are within one or more threshold limits of known positions and orientations of the plurality of magnetic sensors., 'one or more ...

MEASURING DEVICE FOR MEASURING THE MAGNETIC PROPERTIES OF THE SURROUNDINGS OF THE MEASURING DEVICE

A measuring device for measuring magnetic properties of the surroundings of the device includes at least one magnetoresistive element extending in a line direction, and a support field device generating a magnetic support field in an area over the line direction. A pre-magnetization device of one or more magnets is arranged at a distance from the sensor line in a direction vertical to the line direction and extending parallel to the line direction. The pre-magnetization device is arranged relative to the sensor line such that the fields of the pre-magnetization device and the support magnetic field overlap to provide an overlapping magnetic field with a field strength component pointing in the line direction that is greater at one location on the sensor line than the strength of a field component pointing vertically toward the line direction and not in the direction of the height of the magnetoresistive element. 1. A measuring device for measuring magnetic properties of surroundings of the measuring device having a sensor line comprising at least one magnetoresistive sensor element extending in a line direction and configured to measure magnetic properties in its surroundings , wherein the sensor element has a width and a length as well as a height , wherein the height is less than the width and the height is less than the length , and the line direction points in a direction of the width or in a direction of the length of the sensor element and , with a support field device , which generates a magnetic support field in an area over which the sensor line extends , and with a pre-magnetization device having a pre-magnetization magnet or multiple pre-magnetization magnets , wherein at least one pre-magnetization magnet is arranged at a distance away from the sensor line in a direction that is vertical to the line direction and that extends in a direction parallel to the line direction , wherein:the magnetoresistive sensor element essentially only measures the magnetic ...

Serially connected autonomous location pads

An apparatus, including a bus having electrical power and data lines, and a plurality of location pads, which are positionable at different, respective locations with respect to a body cavity in which the object is located, and which are connected to the bus in series so as to receive electrical power and exchange data signals over the bus. Each location pad includes multiple radiator coils and driving circuitry configured to select, responsively to the data signals, different respective driving frequencies for the coils and to generate, using the electrical power from the bus, driving signals to drive the coils to produce magnetic fields at the respective driving frequencies. The apparatus also includes a console, which is configured to receive and process sensor signals from a magnetic sensor fixed to the object, in response to the magnetic fields in the body cavity, in order to compute position coordinates of the object.

HEMISPHERE AMBIGUITY CORRECTION IN ELECTROMAGNETIC POSITION TRACKING SYSTEMS

A method of receiving EM field magnitude values indicative of a first pose of a mobile unit in relation to a base unit, receiving sensor data from a second sensor associated with the mobile unit, where the sensor data is indicative of a direction of movement of the mobile unit, calculating a set of candidate pose solutions based on the EM field magnitude values, selecting a pose from the set of candidate pose solutions based on the sensor data from the second sensor, and sending the pose to the processor. 1. A method comprising:receiving electromagnetic (EM) field magnitude values indicative of a first pose of a mobile unit in relation to a base unit;receiving sensor data from a second sensor associated with one of the mobile unit and the base unit, wherein the sensor data is indicative of a direction of movement of the one of the mobile unit and the base unit;calculating, by one or more processors, a set of candidate pose solutions based on the EM field magnitude values;selecting a final pose from the set of candidate pose solutions based on the sensor data from the second sensor; andsending the final pose to the one or more processors.2. The method of claim 1 , wherein selecting a pose comprises:calculating, by the one or more processors, a first movement vector for each of the candidate pose solutions;calculating, by the one or more processors, a second movement vector of the mobile unit based on the sensor data from the second sensor;comparing the first movement vectors to the second movement vector; andselecting one of the candidate pose solutions associated with the first movement vector that is closest in value to the second movement vector.3. The method of claim 2 , wherein the movement vector further comprises one of a distance vector claim 2 , a velocity vector claim 2 , and an acceleration vector.4. The method of claim 1 , wherein the base unit comprises one of an EM transmitter and an EM receiver.5. The method of claim 1 , wherein the mobile unit ...

COMPOSITE IMAGE GENERATION SYSTEM AND POSITION INFORMATION CORRECTION SYSTEM

A composite image generation system comprises: a position information detection device that detects position information about a predetermined spot in a real space; and a processing device that generates a composite image in which a separately acquired superimposed image is overlaid onto a desired region in a camera image of the real space captured by a movably placed video camera based on the position information from the position information detection device The processing device includes a position information specifying means that adjusts a detection result from the position information detection device to specify position information about a probe used when superimposing the superimposed image onto the desired region. The position information specifying means comprises a recognition state determination unit that determines a recognition state of a probe marker A by the video camera a used information selection unit that selects which of detection results from an optical tracking means and a non-optical tracking means is to use according to the recognition state, and an output position information decision unit that decides output position information necessary to generate a composite image according to the selected position information. 1. A composite image generation system comprising: a position information detection device that detects position information about a predetermined spot in a real space; and a processing device that generates a composite image in which a separately acquired superimposed image is overlaid onto a desired region in a camera image of the real space captured by a movably placed camera , based on the position information detected by the position information detection device , whereinthe position information detection device comprises an optical tracking means that detects the position information by using the camera image, and a non-optical tracking means that detects the position information without using the camera,the optical ...

CONTROL UNIT, SENSING DEVICE FOR A CAPACITIVE TOUCH PANEL AND METHOD THEREOF

A noise reducing device for a capacitive touch panel and a method of reducing noise for a capacitive touch panel are disclosed to solve problems related to noise generated by a conventional filter circuit and an integrating circuit or external noise. In the invention, at least one switch circuit is used so that the conventional filter circuit and integrating circuit used in the prior are omitted. Signals output from a current measurement circuit are transmitting to a control unit to calculate the location of a touch point, reducing any noise 1. A sensing device for a capacitive touch panel , the capacitive touch panel being rectangular and having a transparent substrate and a sensing layer on the transparent substrate , the sensing layer being transparent and electrically conductive , the capacitive touch panel further having a first X side , a second X side , a first Y side and a second Y side , the sensing device comprising:a first X side switch circuit connected to the first X side;a second X side switch circuit connected to the second X side;a first Y side switch circuit connected to the first Y side;a second Y side switch circuit connected to the second Y side;a sensing source, comprising a first sensing signal source and a second sensing signal source; and a first current measurement circuit, receiving a first X side current signal generated by the first X side switch circuit or a first Y side current signal generated by the first Y side switch circuit;', 'a second current measurement circuit, receiving a second X side current signal generated by the second X side switch circuit or a second Y side current signal generated by the second Y side switch circuit;', 'a first sample and hold circuit, connected to and sampling output of the first current measurement circuit;', 'a second sample and hold circuit, connected to and sampling output of the second current measurement circuit;', 'a switch, selectively connected to one of outputs of the first sample and hold ...

THROUGH-THE-WALL MAGNETOQUASISTATIC POSITIONING

Magnetoquasistatic through-the-wall non-line-of-sight coupling between a mobile transmitting device located within a building, or indoor, and a fixed receiving device located outside the building, outdoor, enables positioning of the transmitting device through the wall of the building and in non-line-of-sight environments. Systems based on magnetoquasistatic coupling can separately sense the distance and orientation of the transmitting device accurately even in heavy non-line-sight environments such as steel-reinforced buildings. The approach permits sensing and determination of location and attitude of mobile devices in buildings and can be used to locate rescue workers, first responders, or law enforcement officers inside a building. 1. A method comprising:providing at least one transmitter configured to transmit a magnetoquasistatic field, the at least one transmitter comprising at least two coils orthogonal to each other, the at least two coils each having, during operation, an equivalent magnetic moment parallel to a horizontal plane formed by a y axis and an x axis, the y axis being perpendicular to a surface of an external wall of the building, and the x axis being orthogonal to the y axis and parallel to the surface of the external wall;providing at least one receiver configured to detect the magnetoquasistatic field, the at least one receiver being located outside the building;transmitting, through the external wall, the magnetoquasistatic field with the at least one transmitter;measuring, through the wall, the magnetoquasistatic field with the at least one receiver;approximating the building as a homogeneous conducting body for penetration of the magnetoquasistatic field;decoupling a range and orientation of the at least one transmitter relative to the at least one receiver; andbased on the approximating and decoupling, measuring a first coordinate position, along the y axis, between the at least one transmitter and the external wall, and a second ...

TRACKING OF CATHETER FROM INSERTION POINT TO HEART USING IMPEDANCE MEASUREMENTS

A subject-specific skeletal model of a body is created, and an intended path of a catheter within the body is defined in the model. While the probe is inserted into the body electrical currents are passed through the body between at least one electrode in the probe and through respective electroconductive location pads that are disposed at a plurality of locations on the body surface along the intended path. Based on respective characteristics of the currents passing through the plurality of locations, position coordinates of the probe are iteratively determined. The actual path of the probe is tracked with reference to in the model using the iteratively determined position coordinates to determine whether the actual path corresponds to the intended path. 1. A method of catheterization , comprising the steps of:creating a subject-specific skeletal model of a body of a subject;in the model defining an intended path of a probe within the body that leads from a point of insertion of the probe to a target;inserting the probe into the body, wherein the probe comprises at least one electrode;passing electrical currents through the body between the at least one electrode and respective electroconductive location pads that are disposed at a plurality of locations on a surface of the body, wherein the plurality of locations are distributed along the intended path of the probe;measuring respective characteristics of the currents passing through the plurality of locations; andwhile inserting the probe iteratively determining position coordinates of the probe responsively to the measured characteristics;in the model tracking an actual path of the probe using the iteratively determined position coordinates; anddetermining whether the actual path corresponds to the intended path.2. The method according to claim 1 , wherein the location pads are spaced apart at intervals between 20 and 40 mm.3. The method according to claim 1 , wherein the location pads have operating volumes and ...

Method and device for automatically determining the position of a microsystem for manipulating a spherical microobject

In a method for automated determination of the relative position (x/y/z) between a first hole ( 27 ) on a first microsystem component ( 11 ), which is preferably provided with a first channel ( 44 ) opening in the first hole ( 27 ), and at least one second hole ( 29 ) on a second microsystem component ( 12 ), which is preferably provided with a second channel ( 45 ) opening in the second hole ( 29 ), the two microsystem components ( 11, 12 ) lie in a liquid medium ( 41 ) at least in the region ( 25, 26 ) of the holes ( 27, 29 ). Under the supervision of a control device ( 15 ) controlled by a computer ( 22 ), the first and second microsystem components ( 11, 12 ) are displaced relative to one another into different relative positions (x/y/z). Electrical signals ( 37 ) are delivered to one of the two microsystem components ( 12, 12 ) and are recorded on the other of the two microsystem components ( 11, 12 ) as measurement values ( 38 ) which depend on the relative position of the two microsystem components ( 11, 12 ) with respect to one another. For different relative positions (x/y/z) between the two microsystem components ( 11, 12 ), measurement values ( 38 ) are determined, from which the relative position (xn/yn/zn) in which the two microsystem components ( 11, 12 ) are to be positioned with respect to one another in such a way that their holes ( 27, 29 ) are mutually aligned is ascertained in the control device ( 15 ) (FIG. 1 ).

SPARSE CALIBRATION OF MAGNETIC FIELD CREATED BY COILS IN METAL-RICH ENVIRONMENT

A calibration method includes receiving magnetic field values, which are generated by a plurality of real magnetic transmitters and are measured at multiple positions on a grid in a region containing a magnetic field perturbing element. Approximate locations of the real magnetic transmitters are received. Using the approximate locations, a respective plurality of imaginary magnetic sources is characterized inside the field perturbing element. Using the measured magnetic field values, the approximate locations, and the characterized imaginary sources, there are iteratively calculated (i) actual locations of the real and imaginary magnetic sources in the region, and (ii) modeled magnetic field values that would result from the real and imaginary magnetic sources at the actual locations. Using the calculated locations, and the modeled magnetic field values at the multiple positions on the grid, a magnetic field calibration function is derived for the region. 1. A calibration method , comprising:receiving magnetic field values, which are generated by a plurality of real magnetic transmitters and are measured at multiple positions on a grid in a region containing a magnetic field perturbing element;receiving approximate locations of the real magnetic transmitters;using the approximate locations, characterizing a respective plurality of imaginary magnetic sources inside the field perturbing element;using the measured magnetic field values, the approximate locations, and the characterized imaginary sources, iteratively calculating (i) actual locations of the real and imaginary magnetic sources in the region and (ii) modeled magnetic field values that would result from the real and imaginary magnetic sources at the actual locations; andusing the calculated locations, and the modeled magnetic field values at the multiple positions on the grid, deriving a magnetic field calibration function for the region.2. The calibration method according to claim 1 , wherein receiving the ...

Method and device for automatically determining the position of a microsystem for manipulating a spherical microobject

In a method for automated determination of the relative position (x/y/z) between a first hole ( 27 ) on a first microsystem component ( 11 ), which is preferably provided with a first channel ( 44 ) opening in the first hole ( 27 ), and at least one second hole ( 29 ) on a second microsystem component ( 12 ), which is preferably provided with a second channel ( 45 ) opening in the second hole ( 29 ), the two microsystem components ( 11, 12 ) lie in a liquid medium ( 41 ) at least in the region ( 25, 26 ) of the holes ( 27, 29 ). Under the supervision of a control device ( 15 ) controlled by a computer ( 22 ), the first and second microsystem components ( 11, 12 ) are displaced relative to one another into different relative positions (x/y/z). Electrical signals ( 37 ) are delivered to one of the two microsystem components ( 12, 12 ) and are recorded on the other of the two microsystem components ( 11, 12 ) as measurement values ( 38 ) which depend on the relative position of the two microsystem components ( 11, 12 ) with respect to one another. For different relative positions (x/y/z) between the two microsystem components ( 11, 12 ), measurement values ( 38 ) are determined, from which the relative position (xn/yn/zn) in which the two microsystem components ( 11, 12 ) are to be positioned with respect to one another in such a way that their holes ( 27, 29 ) are mutually aligned is ascertained in the control device ( 15 ) ( FIG. 1 ).

Magnetic tracking system

Apparatus for determining a location of a target, the apparatus comprising: first and second magnetic dipole beacons positioned at substantially a same spatial location having respectively first and second time dependent magnetic moments oriented in different directions that generate first and second magnetic fields having different time dependencies; at least one magnetic field sensor coil located at the location of the target that generates signals responsive to the first and second magnetic fields; and circuitry that receives the signals generated by the at least one sensor coil and processes the signals responsive to the different time dependencies of the magnetic fields to determine a location of the at least one sensor coil and thereby the target.

DEVICE, SYSTEM AND/OR METHOD FOR POSITION TRACKING

Disclosed is a device, system and method for use with sensors including an accelerator, a gyroscope and magnetometers to determine position and orientation of a probe. The probe may be attached to, or incorporate other instruments such as ultrasound transducer and surgical instruments. Each of the sensors generate sensor data, including calibration data. The system may also have a second position sensor in proximity to the probe. The system also has a processing engine receiving the sensor data for calculating the position and orientation of the probe relative to the second position sensor. 1. A position probe system for use with an ultrasound transducer by a user with a patient , wherein the system comprises:(a) a first position sensor comprising: (i) an accelerometer adapted to receive accelerometer data associated with the first position sensor; (ii) a gyroscope adapted to receive gyroscope data associated with the first position sensor; and (iii) a magnetometer adapted to receive magnetometer data associated with the first position sensor;(b) one or more processors operative to: (i) electronically receive the accelerometer data, the gyroscope data and the magnetometer data; and (ii) analyze the accelerometer data, the gyroscope data and the magnetometer data using an analysis algorithm to automatically generate position and orientation data associated with the first position sensor; and(c) one or more databases to electronically store the accelerometer data, the gyroscope data, the magnetometer data and the position and orientation data;wherein the system is operative to facilitate the determination of the position and orientation of the first position sensor.2. The position probe system of claim 1 , further comprising a second position sensor associated with the patient to facilitate the determination of the position and orientation of the first position sensor relative to the patient.3. The position probe system of claim 2 , wherein the second position sensor ...

LOCALIZATION AND ATTITUDE ESTIMATION METHOD USING MAGNETIC FIELD AND SYSTEM THEREOF

A localization and attitude estimation method using magnetic fields includes the following steps. First, in three-dimensional coordinates, at least three magnetic landmarks arbitrarily disposed around a moving carrier are selected, wherein any two of the at least three magnetic landmarks have different magnetic directions. One set of at least five tri-axes magnetic sensors is used to sense the magnetic fields of the at least three magnetic landmarks. Three magnetic components on three axes of a current position of each of the tri-axes magnetic sensors are respectively generated by a demagnetization method. Five non-linear magnetic equations are solved to obtain position information and magnetic moment information of the at least three magnetic landmarks in the three-dimensional coordinates. Position vectors and attitude vectors of the set of at least five tri-axes magnetic sensors in a three-dimensional space are estimated based on tri-axes magnetic moment vectors of the magnetic landmarks. 1. A localization and attitude estimation method using magnetic fields to localize a moving carrier , on which one set of at least five td-axes magnetic sensors is disposed , the localization and attitude estimation method comprising:selecting at least three magnetic landmarks arbitrarily disposed around the moving carrier in three-dimensional coordinates, wherein any two of the at least three magnetic landmarks have different magnetic directions, wherein position information and magnetic moment information of the at least three magnetic landmarks in the three-dimensional coordinates are unknown information;using the set of at least five tri-axes magnetic sensors to sense the magnetic fields of the at least three magnetic landmarks, and respectively generating three magnetic components on three axes of a current position of each of the tri-axes magnetic sensors using a demagnetization method, wherein three-dimensional coordinates of the set of at least five tri-axes magnetic ...

METHOD OF MEASURING FREQUENCY OF COORDINATE INDICATING DEVICE, AND ELECTRONIC APPARATUS THEREOF

An electronic apparatus for measuring a frequency of an electromagnetic signal emitted from a coordinate indicating device contacting a sensor pad, and method are provided. The electronic apparatus includes a signal receiving unit that receives the electromagnetic signal, a band-pass filter unit including a pair of band-pass filters that generates a first filtered signal and a second filtered signal by respectively filtering the electromagnetic signal in a first frequency range and a second frequency range corresponding to a center frequency of the coordinate indicating device, and a controller that acquires a frequency value of the electromagnetic signal based on a ratio value between the first filtered signal and the second filtered signal. 1. An electronic apparatus for measuring a frequency of an electromagnetic signal emitted from a coordinate indicating device contacting a sensor pad , the electronic apparatus comprising:a signal receiving unit that receives the electromagnetic signal;a band-pass filter unit comprising one band-pass filter that generates a first filtered signal and a second filtered signal by filtering the electromagnetic signal in a first frequency range and a second frequency range respectively; anda controller that acquires a frequency value of the electromagnetic signal based on a ratio value between the first filtered signal and the second filtered signal.2. The electronic apparatus of claim 1 , wherein the control unit acquires the frequency value of the electromagnetic signal based on a relation between the ratio value between the first filtered signal and the second filtered signal and a predetermined frequency value.3. The electronic apparatus of claim 1 , whereinthe band-pass filter unit comprises a first band-pass filter and a second band-pass filter,the first band-pass filter receives the electromagnetic signal and filters the first frequency range to generate the first filtered signal, andthe second band-pass filter receives the ...

Magnetic Field Sensor and Related Techniques That Inject An Error Correction Signal Into a Signal Channel To Result In Reduced Error

A magnetic field sensor has an error correction signal generator circuit to inject an error correction signal into a primary signal channel to cancel an error signal component in the primary signal channel.

Method And Apparatus For Phase-Based Synchronization in Magnetic Tracking Systems

A system and method for performing synchronization of a magnetic field transmitter and receiver to resolve received signal phase ambiguity based upon the phases of the magnetic fields. Three orthogonal field frequencies are selected. A Fourier transform extracts the sine and cosine of the received signal, which provides the received signal phases and results in a complex signal matrix (“Sigmat”). A search is made for a phase rotation of the frequencies to achieve convergence of the Sigmat at a point it is real-valued; the search may be limited by aligning the Sigmat such that the major element becomes real-valued and rotating the other two frequencies. The correct phase is the one in which the Sigmat has a positive determinant and minimizes any remaining imaginary portion. A transmitter and receiver may be calibrated to account for any analog phase shift. Distortion of the magnetic field may also be detected and corrected. 1. A system for synchronizing a transmitter and a receiver in a magnetic tracking system , comprising:the transmitter having a plurality of source magnetic coils configured to generate a magnetic field at orthogonal frequencies that converge over a sampling window, each frequency provided by a direct digital synthesis (DDS) component;the receiver having a plurality of sensor magnetic coils configured to sense the magnetic field and generate magnetic sensor data; and perform a complex discrete Fourier transform on the magnetic sensor data from the sensor magnetic coils to determine a complex signal matrix (Sigmat) representing the phase of the sensed magnetic field frequencies;', 'rotate the complex Sigmat by rotating the phases of the sensed magnetic field frequencies to seek convergence of the complex Sigmat at a nearly real value;', 'compute as an error for each rotation a norm of any remaining imaginary portion of the rotated Sigmat;', 'multiply the rotated Sigmat by −1 when the real-valued determinant of the rotated Sigmat with the smallest ...

SYSTEMS AND METHODS FOR POSITION TRACKING USING MAGNETOQUASISTATIC FIELDS

Embodiments of the invention broadly contemplate systems, methods, apparatuses and program products that provide position tracking using a simple, low frequency oscillator that is attached to an object to be tracked, and one or more receiving stations that are placed around the area in which the object moves. Embodiments of the invention enable position tracking of the object using light weight equipment which minimally impacts the object's natural state. 1. A system comprising:one or more processors;a receiving module configured to receive one or more inputs derived from an emitter configured to include one or more antennas emitting quasistatic magnetic fields; anda program storage device tangibly storing a program of instructions executable by the one or more processors, the program of instructions comprising:computer readable program code configured to utilize the one or more inputs to determine an above ground position and orientation of the emitter utilizing complex image theory, fingerprinting technique, or the combination thereof.2. The system according to claim 1 , wherein the one or more antennas comprises a first group of at least two collocated antennas positioned at different orientations with respect to each other.3. The system according to claim 2 , further comprising a second group of at least two collocated antennas positioned at different orientations with respect to each other claim 2 , and wherein the first group is attached to a first part of an object and the second group is attached to a second part of the object.4. The system according to claim 1 , wherein the program of instructions further comprises computer readable program code configured to take into account an image dipole in the one or more inputs using complex image theory.5. The system according to claim 1 , wherein the one or more inputs correspond to one or more of a magnitude and a direction of the quasistatic fields produced by the emitter.6. The system according to claim 1 , ...

ANALYZING METHOD

A method includes providing a jig including a predetermined center and a magnetron installed on the jig; rotating the magnetron and obtaining a measured first magnetic flux density at the predetermined center of the jig; defining a first area of the magnetron based on the measured first magnetic flux density; rotating the magnetron and measuring a plurality of second magnetic flux densities within the first area of the magnetron; deriving a measured second magnetic flux density among the plurality of second magnetic flux densities; comparing the measured second magnetic flux density with a predetermined threshold; and performing an operation based on the comparison. 1. A method , comprising:providing a jig including a predetermined center and a magnetron installed on the jig;rotating the magnetron and obtaining a measured first magnetic flux density at the predetermined center of the jig;defining a first area of the magnetron based on the measured first magnetic flux density;rotating the magnetron and measuring a plurality of second magnetic flux densities within the first area of the magnetron;deriving a measured second magnetic flux density among the plurality of second magnetic flux densities;comparing the measured second magnetic flux density with a predetermined threshold; andperforming an operation based on the comparison.2. The method of claim 1 , wherein the performance of the operation includes:defining a center of the magnetron having the minimum second magnetic flux density;deriving a position of the center of the magnetron;moving a probe to the position of the center of the magnetron.3. The method of claim 2 , wherein the measured second magnetic flux density is equal to or substantially less than the predetermined threshold.4. The method of claim 2 , wherein the center of the magnetron is vertically aligned with or deviated from the predetermined center of the jig.5. The method of claim 1 , wherein a dimension of the first area of the magnetron is ...

DIRECTED EMITTER/SENSOR FOR ELECTROMAGNETIC TRACKING IN AUGMENTED REALITY SYSTEMS

An electromagnetic tracking system includes a hand held controller including an electromagnetic emitter configured to generate an electromagnetic field characterized by an electromagnetic field pattern and a first electromagnetic reflector positioned adjacent the electromagnetic emitter and configured to form a modified electromagnetic field pattern. The electromagnetic tracking system also includes a head mounted augmented reality display including an electromagnetic sensor configured to sense the electromagnetic field and a second electromagnetic reflector adjacent to sensor configured to optimally sense electromagnetic field pattern in a region of interest. 1. (canceled)2. A head-mounted , augmented reality display system comprising: an electromagnetic emitter configured to produce an electromagnetic field; and', 'a first electromagnetic reflector including three first reflective elements forming a first corner vertex of a first cube; and, 'a handheld controller comprising a right temple;', 'a left temple; and', an electromagnetic sensor; and', 'a second electromagnetic reflector including three second reflective elements forming a second corner vertex of a second cube., 'a sensor housing mounted on at least one of the right temple or left temple, the sensor housing comprising], 'a headset comprising3. The head-mounted claim 2 , augmented reality display system of wherein the first electromagnetic reflector defines a first coordinate space claim 2 , wherein the first corner vertex of the first cube lies at the origin of the first coordinate space.4. The head-mounted claim 3 , augmented reality display system of wherein the electromagnetic emitter is positioned along a line directed at point (1 claim 3 ,1 claim 3 ,1) in the first coordinate space.5. The head-mounted claim 4 , augmented reality display system of wherein the first electromagnetic reflector produces a modified electromagnetic field having a lobe lying along the line directed at point (1 claim 4 ,1 ...

Hybrid mobile entity, method and device for interfacing a plurality of hybrid mobile entities with a computer system, and a set for a virtual or augmented reality system

Disclosed is a hybrid mobile entity for a device for interfacing a plurality of mobile entities with a computer system, the hybrid mobile entity including at least one location module including: a unit for emitting an electromagnetic signal making it possible to determine the position of the location module; and a unit for receiving an activation signal and, according to at least one item of information of the activation signal, activating the unit for emitting an electromagnetic signal. The hybrid mobile entity further including: an inertial measurement unit rigidly joined to the location module; and a unit for communication with the device, for transmitting data relative to a movement of the inertial measurement unit. 1104105500600501. A hybrid mobile entity ( , , , ) for a device for interfacing a plurality of mobile entities with a computer system , said hybrid mobile entity comprising at least one location module () comprising the following means:{'b': '606', 'means () for emitting an electromagnetic signal making it possible to compute the position of said location module; and,'}{'b': '602', 'means () for receiving an activation signal and, according to at least one item of information of said activation signal, activating said means for emitting an electromagnetic signal;'}{'b': 104', '105', '500', '600, 'claim-text': [{'b': 502', '607, 'an inertial measurement unit (, ) rigidly joined to said location module; and'}, {'b': 503', '608, 'means (, ) for communication with said device, for transmitting data relative to a movement of the inertial measurement unit.'}], 'said hybrid mobile entity (, , , ) further comprising2104105500600503608501. A hybrid mobile entity ( claim 1 , claim 1 , claim 1 , ) according to claim 1 , wherein the communication means ( claim 1 , ) are furthermore configured to receive at least one position information item of said location module ().3104105500600609501. A hybrid mobile entity ( claim 2 , claim 2 , claim 2 , ) according to ...

SELECTIVE TRACKING OF A HEAD-MOUNTED DISPLAY

A tracking system tracks a target object separated from a head-mounted display (HMD). The tracking system includes a first tracking device (e.g., a camera), a second tracking device (e.g., magnetic tracking system), and a selective tracking system. The first tracking device determines a position of the target object using the first type of tracking information, and determines a tracking error that is associated with the determined position. The selective tracking system compares the tracking error to a threshold value, and based on the comparison, determines a position of the target object using the second tracking device. 1. A tracking system comprising:a camera assembly configured to capture one or more images of a local area;a magnetic field generator coupled to a target object, the magnetic field generator configured to generate a magnetic field;a magnetic sensor assembly coupled to a head-mounted display that is separate from the target object, the magnetic sensor assembly configured to detect the magnetic field; determine whether the target object is within an effective field of view of the camera assembly using the captured images, and', 'responsive to the target object being outside the effective field of view, determine a position of the target object using the detected magnetic field, and', 'responsive to the target object being inside the effective field of view, determine a position of the target object using the captured images., 'a selective tracking system configured to track the target object, wherein the selective tracking system is configured to2. The tracking system of claim 1 , wherein the selective tracking system is further configured to:determine whether the captured images include at least a threshold percentage of the target object; andresponsive to determination that the captured images do not include at least a threshold percentage of the target object, determine that the target object is outside the effective field of view of the camera ...

POSITION INDICATOR AND POSITION INDICATING METHOD

A position indicator includes a resonant circuit configured to receive electromagnetic waves transmitted intermittently from a position detection device with a first duration and a second duration. The second duration is shorter than the first duration. The position indicator also includes a load resistance value control circuit configured to control a load resistance of the resonant circuit such that different values of the load resistance are set for the first duration and the second duration. A value of the load resistance set for the second duration is smaller than a value of the load resistance set for the first duration. 1. A position indicator comprising:a resonant circuit configured to receive electromagnetic waves transmitted intermittently from a position detection device with a first duration and a second duration, the second duration being shorter than the first duration; anda load resistance value control circuit configured to control a load resistance of the resonant circuit such that different values of the load resistance are set for the first duration and the second duration, a value of the load resistance set for the second duration being smaller than a value of the load resistance set for the first duration.2. The position indicator according to claim 1 , wherein:the load resistance value control circuit includes a series circuit including a resistor and a switch and connected in parallel with the resonant circuit, andthe load resistance value control circuit is configured to control the switch to turn off for the first duration, and to turn on for the second duration.3. The position indicator according to claim 2 , wherein the load resistance value control circuit controls the switch to turn on or off at a timing corresponding to the first duration of the electromagnetic waves received from the position detection device.4. The position indicator according to claim 1 , further comprising:an information generating circuit configured to generate ...

SYSTEMS AND METHODS FOR AUGMENTED REALITY

An augmented reality display system includes an electromagnetic field emitter to emit a known magnetic field in a known coordinate system. The system also includes an electromagnetic sensor to measure a parameter related to a magnetic flux at the electromagnetic sensor resulting from the known magnetic field. The system further includes a depth sensor to measure a distance in the known coordinate system. Moreover, the system includes a controller to determine pose information of the electromagnetic sensor relative to the electromagnetic field emitter in the known coordinate system based at least in part on the parameter related to the magnetic flux measured by the electromagnetic sensor and the distance measured by the depth sensor. In addition, the system includes a display system to display virtual content to a user based at least in part on the pose information of the electromagnetic sensor relative to the electromagnetic field emitter. 1. An augmented reality (AR) display system , comprising:an electromagnetic field emitter to emit a known magnetic field in a known coordinate system;an electromagnetic sensor to measure a parameter related to a magnetic flux at the electromagnetic sensor resulting from the known magnetic field;a depth sensor to measure a distance in the known coordinate system;a controller to determine pose information of the electromagnetic sensor relative to the electromagnetic field emitter in the known coordinate system based at least in part on the parameter related to the magnetic flux measured by the electromagnetic sensor and the distance measured by the depth sensor; anda display system to display virtual content to a user based at least in part on the pose information of the electromagnetic sensor relative to the electromagnetic field emitter.28-. (canceled)9. The AR display system of claim 1 , further comprising a world capture camera and a picture camera claim 1 ,wherein the depth sensor comprises a depth camera having a first field ...

MAGNETICALLY SUSPENDED AND PLANE-DROVE VIBRATION ISOLATOR

A magnetically suspended and plane-drove vibration isolator with zero stiffness comprises an upper mounting plate, a lower mounting plate and a main body. A sleeve of the main body is lubricated and supported against the lower mounting plate by a magnetically suspended planar motor. A piston cylinder fitted in the sleeve is lubricated against the sleeve by a cylindrical air bearing surface. The angle degree of freedom between the upper mounting plate and the lower mounting plate is decoupled by a spherical air bearing. A position close-loop control system is formed to precisely control the relative position between the upper mounting plate and the lower mounting plate. 1. A magnetically suspended and plane-drove vibration isolator with zero stiffness , comprising:{'b': '1', 'a upper mounting plate (),'}{'b': '2', 'a lower mounting plate (),'}{'b': 4', '1', '2, 'a main body () fitted between the upper mourning plate () and the lower mounting plate (), and'}{'b': 3', '4', '26, 'a clean air compressor () connected to the main body () through an air pipe ();'}{'b': '4', 'wherein the main body () comprising'}{'b': 6', '2', '24, 'a downside-down sleeve () lubricated and supported against the lower mounting plate () by a magnetically suspended planar motor (),'}{'b': 5', '6', '6', '22, 'a upside-down piston cylinder () fitted in the sleeve () and lubricated against the sleeve () by a cylindrical air bearing surface (),'}{'b': 7', '5', '1, 'a spherical air bearing () fitted between the piston cylinder () and the upper mounting plate ();'}{'b': 10', '13', '16', '5', '6, 'a voice coil motor in Z direction () for providing a vertical driving force, a displacement sensor in Z direction () and a limit switch in Z direction () having respective sensitive directions along the direction of the vertical driving force that are fitted between the piston cylinder () and the sleeve ();'}{'b': '24', 'a magnetically suspended planar motor () for providing a first horizontal driving force ...

Hand Tool Device

A hand tool device comprises a computing unit and at least one locating device configured to receive two orthogonal polarization directions of at least one reflected locating signal. The computing unit is configured to determine, from two received polarization directions of the reflected locating signal, an item of orientation information of a concealed, elongate object. 1. A handheld tool apparatus , comprising:a computation unit;at least one locating apparatus configured to receive two orthogonal polarization directions of at least one reflected locating signal,wherein the computation unit is configured to determine, with the two orthogonal polarization directions, a piece of orientation information of an elongate locatable object that is concealed.2. The handheld tool apparatus as claimed in claim 1 , wherein the computation unit is configured to determine the piece of orientation information from at least one cross-polarization parameter of the at least one reflected locating signal.3. The handheld tool apparatus as claimed in claim 2 , wherein the computation unit is configured to determine a total cross-polarization parameter from the at least one cross-polarization parameter.4. The handheld tool apparatus as claimed in claim 1 , wherein the computation unit is configured to determine the piece of orientation information from at least one copolarization parameter of the at least one reflected locating signal.5. The handheld tool apparatus as claimed in claim 4 , wherein the computation unit is configured to determine an angle-shifted total cross-polarization parameter (S) from the at least one copolarization parameter.6. The handheld tool apparatus as claimed in claim 5 , wherein the computation unit is configured to determine the piece of orientation information from an absolute value of a total cross-polarization parameter and an absolute value of the angle-shifted total cross-polarization parameter.7. The handheld tool apparatus as claimed in claim 6 , ...

SENSOR FUSION FOR ELECTROMAGNETIC TRACKING

Head-mounted augmented reality (AR) devices can track pose of a wearer's head or pose of a hand-held user input device to enable wearer interaction in a three-dimensional AR environment. A pose sensor (e.g., an inertial measurement unit) in the user input device can provide data on pose (e.g., position or orientation) of the user input device. An electromagnetic (EM) tracking system can also provide pose data. For example, the handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. The AR device can combine the output of the pose sensor and the EM tracking system to reduce drift in the estimated pose of the user input device or to transform the pose into a world coordinate system used by the AR device. The AR device can utilize a Kalman filter to combine the output of the pose sensor and the EM tracking system. 2. The wearable system of claim 1 , wherein to calculate the predicted pose claim 1 , the one or more computer processor is programmed to:calculate an estimated EM emitter pose in the world reference frame; andcalculate an estimated EM sensor pose in the world reference frame; andcalculate a relative pose between the estimated EM emitter pose in the world reference frame and the estimated EM sensor pose in the world reference frame.3. The wearable system of claim 2 , wherein said calculating the estimated EM emitter pose in the world reference frame comprises:accessing a pose of the handheld user input device in the world reference frame; andapply EM transmitter extrinsics configured to adjust for position of the EM emitter relative to a fiducial position of the handheld user input device.4. The wearable system of claim 3 , wherein the EM transmitter extrinsics comprise a displacement between the position of the EM emitter and the fiducial position of the handheld user input device.5. The wearable system of claim 1 , wherein the error state is calculated ...

METHOD AND ARRANGEMENT FOR DETERMINING LOCATION AND/OR SPEED OF A MOVING OBJECT AND USE OF THE ARRANGEMENT

A method and an arrangement is provided for determining the location and/or speed of an object configured to move along a controlled trajectory, in connection with which object is fitted a measuring device measuring at least the magnetic field acting on the object in its different locations, which measuring device comprises a device configured to measure the magnetic field, from the measuring data received from which device a magnetic footprint describing the magnetic field acting on the object in its different locations is formed, which magnetic footprint is recorded in connection with a teaching run, or with self-learning, for later use. The location of the object after a teaching run is determined by measuring in essentially real-time in the direction of the three coordinates X, Y, Z of the magnetic field acting on the object moving along a controlled trajectory and by comparing the measurement results to a magnetic footprint recorded in advance and also by deducing as a result of the comparison the exact location of the object on its path of travel. 1. A method for determining the location and/or speed of an object configured to move along essentially the same controlled trajectory in a magnetic field deflected by a static and/or dynamic change , in which method a measuring device measuring at least the magnetic field acting on the object in its different locations is fitted in connection with the object , which measuring device comprises at least means for measuring the magnetic field , from the measuring data received from which means a magnetic footprint describing the magnetic field acting on the object in its different locations is formed , which magnetic footprint is recorded in the memory of the arrangement for later use before actual operation of the object , whereinbefore actual operation or during operation an initialization is performed, wherein the object is moved on the aforementioned controlled trajectory, and at points determined by either ...

ELECTRICAL ARRANGEMENTS FOR SENSOR ASSEMBLIES IN ELECTROMAGNETIC NAVIGATION SYSTEMS

A sensor assembly includes a multilayer circuit, a first magnetic field sensor, and a second magnetic field sensor. The multilayer circuit extends between a proximal end and a distal end along a longitudinal axis. The multilayer circuit includes a plurality of electrical pads positioned at the proximal end. The first magnetic field sensor is coupled to the multilayer circuit and has a primary sensing direction aligned with the longitudinal axis. The second magnetic field sensor is coupled to the multilayer circuit and oriented with respect to the first magnetic field sensor such that the second magnetic field sensor has a primary sensing direction aligned with an axis orthogonal to the longitudinal axis. 1. A system comprising: a multilayer circuit including a proximal section, a distal section, and a longitudinal axis, the proximal section including a plurality of electrical pads and being at least partially folded,', 'a first magnetic field sensor coupled to the multilayer circuit at the distal section and having a primary sensing direction aligned with the longitudinal axis, and', 'a second magnetic field sensor coupled to the multilayer circuit at the distal section and oriented with respect to the first magnetic field sensor such that the second magnetic field sensor has a primary sensing direction aligned with an axis orthogonal to the longitudinal axis., 'a sensor assembly including2. The system of claim 1 , wherein the multilayer circuit includes a flexible substrate layer claim 1 , wherein a first subset of the plurality of electrical pads is positioned on a first side of the flexible substrate layer claim 1 , and wherein a second subset of the plurality of electrical pads is positioned on a second side of the flexible substrate layer opposite the first side.3. The system of claim 1 , wherein the proximal section of the multilayer circuit is substantially c-shaped.4. The system of claim 1 , wherein the proximal section of the multilayer circuit includes a ...

Calibrating a Magnetic Transmitter

A calibration device comprising: a plurality of magnetic sensors positioned at the calibration device, the plurality of magnetic sensors defining a space; a controller configured to be positioned in the space defined by the plurality of magnetic sensors, wherein the controller includes a magnetic transmitter; and one or more processors configured to: cause the magnetic transmitter to generate magnetic fields; receive signals from the plurality of magnetic sensors that are based on characteristics of the magnetic fields received at the plurality of magnetic sensors; calculate, based on the signals received from the plurality of magnetic sensors, positions and orientations of the plurality of magnetic sensors relative to a position and orientation of the magnetic transmitter; and determine whether the calculated positions and orientations of the plurality of magnetic sensors are within one or more threshold limits of known positions and orientations of the plurality of magnetic sensors. 1. A calibration device comprising:a plurality of magnetic sensors positioned at the calibration device, the plurality of magnetic sensors defining a space;a controller configured to be positioned in the space defined by the plurality of magnetic sensors, wherein the controller includes a magnetic transmitter; and cause the magnetic transmitter to generate a plurality of magnetic fields;', 'receive signals from the plurality of magnetic sensors that are based on characteristics of the plurality of magnetic fields received at the plurality of magnetic sensors;', 'calculate, based on the signals received from the plurality of magnetic sensors, positions and orientations of the plurality of magnetic sensors relative to a position and orientation of the controller and the magnetic transmitter; and', 'determine whether the calculated positions and orientations of the plurality of magnetic sensors are within one or more threshold limits of known positions and orientations of the plurality of ...

Calibrating a Magnetic Sensor

A calibration system comprising: a Helmholtz device comprising thee pairs of coils defining an inner volume, wherein each of the three pairs of coils is configured to generate a magnetic field that is uniform throughout the inner volume; a mount configured to accept a device that includes a magnetic sensor, wherein at least a portion of the mount is positioned within the inner volume such that the magnetic sensor is positioned at or near a center of the inner volume when the device is positioned on the mount; and a computer system configured to communicate with the Helmholtz device and the magnetic sensor, wherein the computer system is configured to: provide instructions to cause each of the three pairs of coils to generate a magnetic field; receive signals from the magnetic sensor that are based on characteristics of the magnetic fields received at the magnetic sensor; measure, based on the signals received from the magnetic sensor, one or more characteristics of the magnetic sensor; and determine, using a calibration algorithm, one or more calibration correction factors for the magnetic sensor based on the one or more characteristics of the magnetic sensor and the provided instructions. 1. A calibration system comprising:a Helmholtz device comprising thee pairs of coils defining an inner volume, wherein each of the three pairs of coils is configured to generate a magnetic field that is uniform throughout the inner volume;a mount configured to accept a device that includes a magnetic sensor, wherein at least a portion of the mount is positioned within the inner volume such that the magnetic sensor is positioned at or near a center of the inner volume when the device is positioned on the mount; anda computer system configured to communicate with the Helmholtz device and the magnetic sensor, provide instructions to cause each of the three pairs of coils to generate a magnetic field;', 'receive signals from the magnetic sensor that are based on characteristics of the ...

Fixturing apparatus

A fixturing apparatus is described that can be used with metrology apparatus, such as coordinate measuring machines, flexible gauges and the like. The fixturing apparatus has a base and a plurality of supports extending from the base that are configured to retain an object. At least one of the plurality of supports comprises a floating support having a floating support element that is moveable relative to the base upon contact with an object being loaded into the fixture. A locking mechanism, such as a pneumatic locking mechanism, is provided that can be actuated to immobilise each floating support element relative to the base. The object may have a glass sheet. A corresponding method of fixturing an object is also described.

APPARATUS AND ASSOCIATED METHODS FOR DETECTING A CENTER PLANE OF A MEMBER THROUGH A BARRIER

An apparatus is disclosed for identifying a target region along a surface of a barrier corresponding to a plane defined along a member, where the member is occluded from view by nature of the barrier. The apparatus includes a measurement device and a magnet assembly. The magnet assembly generates a magnetic field, and is positioned along a predetermined location of the member over a first side of the barrier. The measurement device is positioned over a second side of the barrier and measures properties of the magnetic field to identify the target region in general alignment with the plane. 1. An apparatus for identifying a plane defined by a member through an occluding barrier , comprising: a first magnetic block positioned over a first lateral side of the member adjacent the first side of the barrier, and', 'a second magnetic block positioned over a second lateral side of the member opposite the first lateral side; and, 'a magnet assembly that generates a magnetic field, the magnet assembly positioned along a predetermined location of a member, the member being positioned over a first side of a barrier, the magnet assembly including'}a measurement device positioned over a second side of the barrier opposite the first side of the barrier where the measurement device identifies a target region along a surface of the barrier by detecting a presence of at least one force vector of a plurality of force vectors of the magnetic field extending from the member through the barrier in a direction that is parallel to a plane defined through the member, the plane defined equidistantly between the first lateral side and the second lateral side of the member and extending in transverse relation relative to the barrier.2. The apparatus of claim 1 , wherein the first magnetic block and the second magnetic block symmetrically are counterposed along the member claim 1 , and the first magnetic block defines a first magnetic pole and the second magnetic block defines a second magnetic ...

METHOD FOR LOCATING AN OBJECT MOVING IN A MAGNETIC FIELD GENERATED BY A SET OF AT LEAST THREE MAGNETIC GENERATORS

The present invention relates to a method for locating an object () integral with a triaxial magnetic sensor () moving in a magnetic field generated by a set of at least three triaxial magnetic generators () static in a common reference frame, the method being characterised in that it includes the steps of: 1123. Method for locating an object () integral with a triaxial magnetic sensor () moving in a magnetic field generated by a set of at least three triaxial magnetic generators () static in a common reference frame , the method being characterised in that it includes the steps of:{'b': 3', '2', '3', '2, '(a) For each generator () determining as a function of magnetic field measurements acquired by the sensor () and associated with said generator () a position of said sensor () in said common reference frame;'}{'b': 3', '2', '3, '(b) Calculating for each generator () a parameter representative of an error on said determined position of the sensor () for the generator ();'}{'b': 3', '3', '3', '3, '(c) Selecting a sub-set of the set of generators () as a function of said parameters estimated for each of the generators (), said selected sub-set of the set of generators () including each generator () for which said estimated parameter is less than at least one reference threshold;'}{'b': 1', '2', '3, '(d) Estimating the position of the object () by merging the determined positions of the sensor () for each generator () selected in said sub-set.'}223. Method according to claim 1 , in which the sensor () and the generators () are each constituted of three coils organised into triaxes.3323. Method according to one of and claim 1 , in which step (b) includes for each generator () the estimation of the values of two mathematical invariants as a function of the magnetic field measurements acquired by the sensor () and associated with said generator ().4233. Method according to claim 3 , in which said parameter representative of an error on said determined position of the ...

Magnetic Beacon Self-Localization Using Mobile Device Magnetometers

A computer-implemented method for determining position of a mobile device using magnetic beacons including detecting, by a sensor in the mobile device, a magnetic signal having a unique signature associated with a given magnetic beacon; storing location and an associated signature for each of a plurality of magnetic beacons in a data store of the mobile device, where each of the magnetic beacons is assigned a different signature; extracting the unique signature from the magnetic signal; comparing the extracted signature to each of the signatures stored in the data store; identifying a given magnetic beacon from the plurality of magnetic beacons, where signature for the given beacon matches the extracted signature; and retrieving the location for the given magnetic beacon for the data store and correlating location of the mobile device with the location of the given magnetic beacon. 1. A computer-implemented method for determining position of a mobile device using magnetic beacons , comprising:detecting, by a sensor in the mobile device, a magnetic signal from a given magnetic beacon, the magnetic signal having a unique signature associated with the given magnetic beacon;storing, by the mobile device, location and an associated signature for each of a plurality of magnetic beacons in a data store of the mobile device, where each of the magnetic beacons is assigned a different signature;extracting, by the mobile device, the unique signature from the magnetic signal;comparing, by the mobile device, the extracted signature to each of the signatures stored in the data store;identifying, by the mobile device, a given magnetic beacon from the plurality of magnetic beacons, where signature for the given beacon matches the extracted signature; andretrieving, by the mobile device, the location for the given magnetic beacon for the data store and correlating location of the mobile device with the location of the given magnetic beacon.2. The method of wherein detecting a ...

REGISTRATION OF AN ANATOMICAL IMAGE WITH A POSITION-TRACKING COORDINATE SYSTEM BASED ON PROXIMITY TO BONE TISSUE

A method includes, identifying, in a three-dimensional (3D) anatomical image of a patient organ, multiple anatomical points corresponding to respective predefined locations on a skin of the patient organ in a first coordinate system. Multiple positions in a second coordinate system, measured by a position sensor of a position-tracking system at the respective predefined locations on the skin of the patient organ, are received. At each predefined location, a distance is calculated between a respective anatomical point and closest bone tissue of the patient organ. Weights are assigned to the predefined locations based on respective distances between the anatomical points and the closest bone tissue. The first and second coordinate systems are registered, by correlating between the positions and the respective anatomical points using the assigned weights. 1. A method , comprising:identifying, in a three-dimensional (3D) anatomical image of a patient organ, multiple anatomical points corresponding to respective predefined locations on a skin of the patient organ in a first coordinate system;receiving multiple positions in a second coordinate system, measured by a position sensor of a position-tracking system at the respective predefined locations on the skin of the patient organ;calculating, at each predefined location, a distance between a respective anatomical point and closest bone tissue of the patient organ;assigning weights to the predefined locations based on respective distances between the anatomical points and the closest bone tissue; andregistering the first and second coordinate systems, by correlating between the positions and the respective anatomical points using the assigned weights.2. The method according to claim 1 , wherein:assigning the weights comprises assigning a first weight to a first predefined location having a first distance to the closest bone tissue, and assigning a second weight, larger than the first weight, to a second predefined ...

METHODS AND SYSTEMS FOR TRACKING USAGE OF AN ITEM

Embodiments are directed to apparatuses, methods and systems for tracking usage of an item. In one scenario, a microcontroller is configured to send a periodic signal over electrical traces that are distributed over an item to determine whether a change in electrical throughput has occurred in a trace. Upon determining that such a change has occurred, an indication is generated that describes the type of usage that occurred and the time at which the use occurred. An indication of the type of usage and the time of occurrence is then provided to specified recipients. Apparatuses for tracking such usage include a battery, a microprocessor, a transmitter and capsules for storing the controlled substances. Each capsule has an electrical trace extending through at least some of the capsule. The microprocessor is configured to determine, using the electrical traces, which capsules have been opened by identifying which traces have been broken. 1. A method for tracking usage of an item , the method comprising:initiating a microcontroller that is configured to send a periodic signal over one or more electrical traces that are distributed over an item to determine whether a change in electrical throughput has occurred in the trace;upon determining that a change in electrical throughput has occurred, generating an indication of the type of usage that occurred and the time it occurred; andproviding the indication of type of usage and the time of occurrence to one or more specified recipients.2. The method of claim 1 , wherein determining that a change in electrical throughput has occurred in the trace comprises determining that electrical conductivity in the trace has changed beyond a threshold amount.3. The method of claim 1 , wherein determining that a change in electrical throughput has occurred in the trace comprises determining that at least one of the electrical traces has been severed.4. The method of claim 1 , wherein determining that a change in electrical throughput ...

COMPACT 3D DIRECTION FINDER

An apparatus that includes two non-coinciding arrangements disposed in an two axes Cartesian coordinate system such that each arrangement having a non-zero projection on a respective axis from among the two axes. Each one of the arrangements includes a pair of oppositely directed, spaced apart, co-axial radiating-capable elements, each of the elements being hollow with internal space, and being slotted throughout its entire extent. A first circuitry coupled to the arrangement and being configured to sense an electric field projection along the axis and to convey it to a first feeding terminal. A second circuitry coupled to a slot of the arrangement and being configured to sense a magnetic field's projection along said axis and to convey it to a first feeding terminal. 1. An apparatus , comprising:at least two non-coinciding arrangements disposed in an at least two axes Cartesian coordinate system such that each arrangement having a non-zero projection on a respective axis from among said at least two axes;each one of said arrangements includes at least one pair of oppositely directed, spaced apart, co-axial radiating-capable elements, each of said elements being hollow with internal space, and being slotted throughout its entire extent;a first circuitry coupled to said arrangement and being configured to sense an electric field projection along sais axis and to convey it to a first feeding terminal;a second circuitry coupled to at least one slot of said arrangement configured to sense a magnetic field's projection along said axis and to convey it to a first feeding terminal,wherein said second circuitry includes passive elements,wherein said passive elements include at least one magnetic element accommodated within the spaces of said at least one pair of elements and extending along a major portion of the elements' longitudinal extent,wherein said magnetic element includes a multi-turn loop over a ferrite rod; andwherein the multi turn loop over ferrite rod is ...

Compact 3D Direction Finding and Polarization Resolving

There is provided an apparatus, including: an arrangement that includes at least one pair of oppositely directed, spaced apart, radiating-capable elements along a common axis, each of said elements being hollow with internal space, and being slotted throughout its entire extent; a first circuitry coupled to said arrangement and being configured to sense an electric field projection along said axis and to convey it to a first feeding terminal; and a second circuitry coupled to at least one slot of said arrangement configured to sense a magnetic field's projection along said axis and to convey it to a first feeding terminal. The apparatus being further configured to resolve a polarization vector of incoming wavefront propagating in an orthogonal direction to said common axis based on at least said sensed electric field projection and said magnetic field projection. 1. An apparatus , comprising:an arrangement that includes at least one pair of oppositely directed, spaced apart, radiating-capable elements along a common axis, each of said elements being hollow with internal space, and being slotted throughout its entire extent; a first circuitry coupled to said arrangement and being configured to sense an electric field projection along said axis and to convey it to a first feeding terminal;a second circuitry coupled to at least one slot of said arrangement configured to sense a magnetic field's projection along said axis and to convey it to a first feeding terminal, the apparatus being further configured to resolve a polarization vector of incoming wavefront propagating in an orthogonal direction to said common axis based on at least said sensed electric field projection and said magnetic field projection.3. The apparatus according to claim 1 , wherein said polarization being eliptic.4. The apparatus according to claim 3 , wherein said polarization being circular.5. The apparatus according to claim 1 , wherein the so resolved polarization is utilized for validating or ...

Electromagnetic-type touch panel, method for driving and detecting electromagnetic-type touch panel, and coordinate input device

An touch panel detecting a touch position of an electromagnetic stylus is disclosed. The touch panel includes first and second coils, and drive and detection circuits. The first coils include a plurality of subgroups of first coils, which includes a first group of first coils and a second group of first coils. The first group of first coils includes at least one subgroup of first coils, and the second group of first coils includes at least one subgroup of first coils. In addition, subgroups of the first and second groups of first coils are alternately arranged. The first group of first coils receive a signal from the drive circuit and emit signals, the second group of first coils receive signals from the stylus and generate induction signals, and the detection circuit determines a value of a coordinate of the touch position of the stylus based on the induction signals.

NEAR-FIELD MAGNETIC OBJECT TRACKING

An object tracking system includes a sensor grid having a plurality of sensor clusters configured to sense the presence of a magnetic field of an object. Each sensor cluster includes three or more single-axis magnetic sensors. The sensors in a cluster may be arranged with their axes parallel to one another. The sensor grid may account for ambient magnetic noise by measuring the magnetic field in a zone a distance away from the object to update the ambient magnetic field noise measurement. The sensor grid or a portion thereof may include a plurality of sensors printed on a common sheet. The sensor grid may comprise one or more sheets overlapped or interconnected. The system may track an object and determine up to three degrees of positioning and three degrees of orientation by using a geometric solution of the intercepts of magnetic field strengths obtained from information collected by the magnetic sensors. 1. An object tracking system comprising:a sensor grid comprising a plurality of sensor clusters configured to sense the presence of an object having a source capable of generating a magnetic field;wherein each sensor cluster comprises three or more single-axis magnetic sensors;wherein the sensor grid comprises a first zone near the object and a second zone including all area within the sensor grid not in the first zone; andwherein the system is configured to update the ambient magnetic field reading of sensors within the second zone.2. The object tracking system of claim 1 , wherein the first zone comprises the area of the sensor grid where the magnetic field read by the sensors from the source object is greater than the ambient magnetic noise.3. The object tracking system of claim 1 , wherein the sensors in a cluster are arranged with their axes parallel to one another.4. The object tracking system of claim 1 , wherein the axes of sensors in a first cluster are not parallel to axes of sensors in a second cluster.5. The object tracking system of claim 1 , wherein ...

Electromagnetic receiver tracking and real-time calibration system and method

An electromagnetic (EM) receiver system for measuring EM signals. The EM receiver system includes a survey EM transmitter for generating survey EM signals within a first frequency range; a tracking EM transmitter for generating tracking signals within a second frequency range; and a receiver section including a receiver that measures both the survey EM signals and the tracking signals.

Resolver Positioning System, Robot And Method Therefor

The present invention relates to a resolver positioning system for a robot, which system is connectable to a battery supply () and is drivable in a pulsed mode. The system comprising: a resolver () arranged to detect an axis position of a robot; a first comparator () connected to the resolver for reading of a first resolver value from the resolver, wherein the first comparator comprises means (-) to provide two different reference levels for the first resolver value; a second comparator () connected to the resolver for reading of a second resolver value from the resolver, wherein the second comparator comprises means (-) to provide two different reference levels for the second resolver value; and a controller () connected to the first and second comparators, wherein the controller is configured to provide a quadrant evaluation of the axis position from the first and second resolver values. 1. A method for detecting a change in positing of an axis of a robot , comprising the following steps:firstly, reading a first resolver value from a first comparator of a resolver positioning system, and reading a second resolver value from a second comparator of said resolver positioning system, wherein said first and second comparators are configured with a first reference value;secondly, reading a first resolver value from said first comparator, and reading a second resolver value from said second comparator, wherein said first and second comparators are configured with a second reference value different from said first reference value; anddetecting a change in position of an axis of a robot only when said first reading indicates a new resolver value and said second reading indicates the same new resolver value.2. The method according to claim 1 , wherein the reference value of said first and second comparator is changed by changing a resistance value of an input of said first and second comparators.3. The method according to claim 1 , wherein a difference of the reference ...

TRACKING POSITIONS OF PORTIONS OF A DEVICE BASED ON DETECTION OF MAGNETIC FIELDS BY MAGNETIC FIELD SENSORS HAVING PREDETERMINED POSITIONS

A wearable device includes a plurality of magnetic field generators positioned at different points to be tracked. The magnetic field generators emit magnetic fields that are sensed by a plurality of magnetic field sensors having known positions relative to each other. The wearable device may have magnetic field generators placed at tracked points corresponding to portions of the fingers and the palm of the device, and magnetic field sensors located at predetermined positions. A position analyzer determines the spatial position of the tracked points on the palm as well as the tracked points on the fingers from the output signals of the magnetic field sensors. From the determined spatial positions of the tracked points, a gesture identification system determines a gesture corresponding to the spatial positions of the points of the wearable device where the magnetic field generators are positioned. 1. A system comprising:a plurality of magnetic field generators, each magnetic field generator configured to generate a magnetic field using a distinct frequency;a plurality of magnetic field sensors, each magnetic field sensor placed at a predetermined fixed position relative to another magnetic field sensor, each magnetic field sensor configured to detect magnetic fields generated by at least a set of the plurality of magnetic field generators and configured to generate an output signal based on strengths and directions of the detected magnetic fields;a position analyzer coupled to the plurality of magnetic field sensors, the position analyzer configured to determine a spatial position of each of the plurality of magnetic field generators relative to a coordinate system based on output signals from each of the plurality of magnetic field sensors and the predetermined locations of each of the one or more magnetic field sensors relative to each other; anda gesture analyzer coupled to the position analyzer, the gesture analyzer configured to determine a gesture corresponding ...

System and method for determining a position on an external surface of an object

The present system and method determine a position on an external surface of an object. The system comprises a magnetic field measurement module and an ultrasound measurement module. A control unit stores a magnetic field map of the object comprising a first plurality of reference areas of the external surface of the object and associated reference magnetic field value. The control unit also stores an ultrasound map of the object comprising a second plurality of reference areas of the external surface of the object and associated reference ultrasound characteristic. The processing unit determines: a subset of the reference areas for which the associated reference magnetic field value is substantially equal to a measured magnetic field value, a subset of the reference areas for which the associated reference ultrasound characteristic is substantially equal to a measured ultrasound characteristic, and determines the position on the external surface of the object.

METHOD FOR CALIBRATING GAP SENSOR

Disclosed is a method for calibrating at least one gap sensor, the at least one gap sensor being provided on a magnetic bearing supporting a floating body in a non-contact manner by an electromagnetic force, the at least one gap sensor being configured to detect a gap between the floating body and a reference object that serves as a positional reference for position control of the floating body. The method includes: constructing a transformation formula for transforming an output of the at least one gap sensor into the gap using three or more constraints that are set as conditions for associating the gap with the output of the at least one gap sensor.

TILTED ANTENNA LOGGING SYSTEMS AND METHODS YIELDING ROBUST MEASUREMENT SIGNALS

Disclosed herein are electromagnetic logging systems and methods that provide a set of signals that robustly approximate the response of a model tool employing orthogonal triads of point-dipole antennas. One illustrative method embodiment obtains an azimuthally sensitive electromagnetic logging tool's signal measurements as a function of position in a borehole, the tool having at least two spacing distances (d, d) between transmit and receive antennas. Orthogonal direct coupling measurements (Vxx, Vyy, Vzz) are derived from the signal measurements and converted into a set of robust signals, the set including: a ratio between Vzz coupling components at different spacing distances, a ratio between Vxx and Vzz coupling components, a ratio between Vyy and Vzz coupling components, and a ratio between Vxx and Vyy coupling components. The set may include an additional robust signal having a ratio between a sum of cross-coupling components Vxz+Vzx or Vyz+Vzy and a sum of orthogonal direct coupling components. 1. An electromagnetic logging method that comprises:{'b': 1', '2, 'obtaining signal measurements collected by an azimuthally sensitive electromagnetic logging tool as a function of position in a borehole, the tool having at least two spacing distances (d, d) between transmit and receive antennas;'}deriving orthogonal direct coupling measurements (Vxx, Vyy, Vzz) from the signal measurements; a ratio between Vzz coupling components at different spacing distances,', 'a ratio between Vxx and Vzz coupling components,', 'a ratio between Vyy and Vzz coupling components, and', 'a ratio between Vxx and Vyy coupling components., 'providing a set of robust signals as a function of position in the borehole, the robust signals including2. The method of claim 1 , further comprising displaying the set of robust signals in log form to a user.3. The method of claim 1 , wherein as part of said deriving or providing claim 1 , the method includes combining measurements associated with ...

POSITION DETECTION DEVICE, SIGNAL PROCESSING CIRCUIT, AND MAGNETIC SENSOR SYSTEM

A magnetic sensor system includes a magnetic sensor device and a signal processing circuit. The magnetic sensor device generates first to third detection signals corresponding to components in three directions a field generated by a magnetic field generator that is able to change its relative position with respect to the magnetic sensor device. The signal processing circuit includes first and second processors. The second processor generates sphere information and transmits it to the first processor. When coordinates representing a set of values of the first to third detection signals in an orthogonal coordinate system are taken as a measurement point, the sphere information includes data on center coordinates of a virtual sphere having a spherical surface approximating a distribution of a plurality of measurement points. The first processor detects a change in offsets of the first to third detection signals by using the sphere information transmitted from the second processor. 1. A position detection device comprising:a magnetic field generator that generates a predetermined magnetic field;a magnetic sensor device; anda signal processing circuit, whereinthe magnetic field generator is able to change its relative position with respect to the magnetic sensor device along a predetermined spherical surface,the magnetic sensor device generates a first detection signal, a second detection signal, and a third detection signal that have correspondences with components in three mutually different directions of a magnetic field at a reference position,the signal processing circuit includes a first processor that performs first processing related to the first to third detection signals, and a second processor that performs second processing related to the first to third detection signals,the first processing includes sphere information reception and storage processing and offset change detection processing,the sphere information reception and storage processing includes ...

Method for Estimating the Harmonization Values of a Magnetometer Installed in a Mobile Machine, Associated Device and Computer Program

A method for estimating the harmonization values of a magnetometer installed in a mobile machine, said magnetometer being associated with its reference coordinate system XM, YM, ZM, said method, implemented by an electronic device, comprising acquiring magnetic field values measured by the magnetometer and determining the horizontal harmonization (hx, hy) by: 1. A method for estimating the harmonization values of a magnetometer installed in a mobile machine , said magnetometer being associated with its reference coordinate system XM , YM , ZM and the mobile machine being associated with its airplane coordinate system XA , YA , ZA , said method , implemented by an electronic device , comprising a step for acquiring a plurality of magnetic field vector values measured by the magnetometer corresponding to successive positions of the mobile machine according to varied successive headings; estimating a first angle equal to the angle between XM and the large axis of an ellipse defined in the plane comprising the two axes XM, ZM by said acquired field vector values;', 'determining hy as being equal to said first estimated angle;', {'sub': M', 'M, 'estimating a second angle equal to the angle between YM and the large axis of an ellipse defined, in the plane comprising the two axes Y, Z, by said acquired field vector values; and'}, 'determining hx as being equal to said second estimated angle., 'said method further comprising a step for determining the horizontal harmonization (hx, hy), where hx corresponds to the Euler angle associated with the rotation around XA, where hy corresponds to the Euler angle associated with the rotation around YA to go from the reference coordinate system XM, YM, ZM of the magnetometer to the airplane coordinate system XA, YA, ZA comprising the following steps2. The method for estimating harmonization values of a magnetometer installed in a mobile machine according to claim 1 , according to which the estimate of the angle among the first or the ...

SYSTEM AND METHOD FOR DETECTING AN APPLICATION OF PRESSURE AT THE SURFACE OF AN OBJECT BY FORCE MEASUREMENT

A system for detecting an application of pressure on a surface of an object, comprising a support of the object equipped with at least one sensor of force and of torque, and a processing unit configured to calculate, on the basis of the measurements of the at least one force and torque sensor, the coordinates of a straight line in space passing through a point of application of pressure on the surface of the object. The processing unit determines, by use of a ray-tracing calculation, whether an elementary facet of a geometric model of the surface of the object representing the surface according to a mesh of elementary facets intercepts the straight line passing through the point of application of pressure. 2. The system according to claim 1 , wherein said module further configured claim 1 , upon determining that an elementary facet intercepts said axis claim 1 , to associate said elementary facet with a location of the point of application of pressure.3. The system according to claim 2 , wherein said module is further configured to determine normal and tangential components of the application of pressure for the elementary facet associated with a location of the point of application of pressure.4. The system according to claim 1 , wherein said module is further configured to calculate a scalar product between the measurements of the at least one force and torque sensor and the normal to each elementary facet of the geometric model claim 1 , with the ray tracing calculation being performed to verify if an elementary facet intercepts said axis only if the scalar product calculated for said elementary facet is negative.5. The system according to claim 1 , wherein said module is configured to calculate a scalar product between the measurements of the at least one force and torque sensor and the normal to an elementary facet determined as intercepting said axis.6. The system according to claim 1 , wherein the geometric model is described by a stereolithography file or by ...

ANGLE SENSOR ARRANGEMENT AND METHOD FOR THE ANGLE SENSOR ARRANGEMENT

An angle sensor arrangement is proposed, said angle sensor arrangement including at least two sensor substrates arranged in such a way that they assume different angular orientations in relation to an axis of rotation, wherein at least one sensor substrate comprises two magnetic field sensor elements arranged in such a way that they assume different angular orientations in relation to the axis of rotation, and comprising a combining device, on the basis of which a linear combination of the magnetic field quantities measured by the two magnetic field sensor elements is determinable. Furthermore, a method for calibrating or operating an angle sensor arrangement is specified. 1. An angle sensor arrangement , comprising:at least two sensor substrates arranged in such a way that they assume different angular orientations in relation to an axis of rotation;wherein at least one sensor substrate comprises two magnetic field sensor elements arranged in such a way that they assume different angular orientations in relation to the axis of rotation; anda combining device, on the basis of which a linear combination of the magnetic field quantities measured by the two magnetic field sensor elements is determinable.2. The apparatus as claimed in claim 1 , wherein an element is coupled or coupleable to claim 1 , or around claim 1 , the axis of rotation claim 1 , said element having a magnetic field source.3. The apparatus as claimed in claim 1 , wherein the at least two sensor substrates are rigidly connected to one another by way of a functional element.4. The apparatus as claimed in claim 1 , wherein the magnetic field sensor elements are arranged at a distance from one another.5. The apparatus as claimed in claim 1 , wherein the magnetic field sensor elements are of the same sensor type.6. The apparatus as claimed in claim 5 , wherein the sensor type is one of the following sensor types: an MR sensor claim 5 , an AMR sensor claim 5 , a GMR sensor claim 5 , a TMR sensor claim 5 , ...

SENSOR FUSION FOR ELECTROMAGNETIC TRACKING

Head-mounted augmented reality (AR) devices can track pose of a wearer's head or pose of a hand-held user input device to enable wearer interaction in a three-dimensional AR environment. A pose sensor (e.g., an inertial measurement unit) in the user input device can provide data on pose (e.g., position or orientation) of the user input device. An electromagnetic (EM) tracking system can also provide pose data. For example, the handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. The AR device can combine the output of the pose sensor and the EM tracking system to reduce drift in the estimated pose of the user input device or to transform the pose into a world coordinate system used by the AR device. 1. A wearable system comprising:a head-mounted display;a handheld user input device comprising an inertial measurement unit (IMU); an EM emitter disposed in or on the handheld user input device, the EM emitter configured to generate an EM field; and', 'an EM sensor disposed in or on the head-mounted display, the EM sensor configured to sense the EM field,', 'wherein the EM tracking system is configured to output an EM field matrix associated with an estimated pose of the EM sensor relative to the EM emitter; and, 'an electromagnetic (EM) tracking system comprising access IMU data from the IMU, the IMU data representative of an estimated pose of the handheld user input device in a reference frame associated with the handheld user input device;', 'access the EM field matrix from the EM tracking system;', 'calculate a predicted EM field matrix representative of a predicted pose of the handheld user input device in a world reference frame associated with an environment of the wearable system;', 'generate an error state based at least partly on the EM field matrix and the predicted EM field matrix, the error state representing at least one of: bias or noise in the IMU ...

Particle Emission Tomography

The present invention provides autoradiography methods and systems for imaging via the detection of alpha particles, beta particles, or other charged particles. Embodiments of the methods and systems provide high-resolution 3D imaging of the distribution of a radioactive probe, such as a radiopharmaceutical, on a tissue sample. Embodiments of the present methods and systems provide imaging of tissue samples by reconstruction of a 3D distribution of a source of particles, such as a radiopharmaceutical. Embodiments of the methods and systems provide tomographic methods including microtomography, macrotomography, cryomicrotomography and cryomacrotomography. 1. A method for reconstructing a 3D distribution of a source of particles , the method comprising the steps of:providing the source of particles from within a tissue sample, wherein the particles comprise beta particles, alpha particles, positrons, or conversion electrons; detecting the particle with a particle-processing detector;', (i) a two dimensional position corresponding to an interaction point where the particle interacts with the particle-processing detector; and', '(ii) an energy that is deposited in the particle-processing detector by the particle; and, 'determining attributes of the particle; wherein the attributes include at least one of, 'storing the attributes of the particle;, 'repeating, for each of a plurality of the particles from the source, the steps ofthereby generating attributes for each of the plurality of particles from the source; andreconstructing the 3D distribution of the source of particles using at least a portion of the attributes for each of the plurality of particles.2. The method of claim 1 , wherein the particle is emitted upon radioactive decay occurring in the tissue to be imaged.3. (canceled)4. The method of claim 1 , further comprising determining the energy and angle of the particle.5. The method of claim 1 , further comprising calculating an energy lost for each of the ...

DETERMINING A SPEED OF A MULTIDIMENSIONAL MOTION IN A GLOBAL COORDINATE SYSTEM

Embodiments relate to determining a speed of a multidimensional motion of an athlete in a global coordinate system based on multidimensional acceleration data from a multidimensional accelerometer placed at a movable limb of the athlete, the movable limb being at least one of translatory and rotatable, and the movable limb defining a local coordinate system. Based on the multidimensional acceleration data, at least one correction quantity may be determined taking into account a rotation of the local coordinate system relative to the global coordinate system during the multidimensional motion. The speed of the multidimensional motion may be determined based on an integration of the multidimensional acceleration data and in consideration of the at least one correction quantity. 1. A method for determining a speed of a multidimensional motion of an athlete in a global coordinate system based on multidimensional acceleration data from a multidimensional accelerometer placed at a movable limb of the athlete , the movable limb being at least one of translatory and rotatable , and the movable limb defining a local coordinate system , the method comprising:determining, based on the multidimensional acceleration data, at least one correction quantity taking into account a rotation of the local coordinate system relative to the global coordinate system during the multidimensional motion; anddetermining the speed of the multidimensional motion based on an integration of the multidimensional acceleration data and in consideration of the at least one correction quantity.2. The method according to claim 1 , wherein the athlete is a boxer wearing at least one boxing glove claim 1 , wherein the multidimensional motion is a multidimensional punch of the boxer claim 1 , and wherein the multidimensional accelerometer is placed at the at least one boxing glove.3. The method according to claim 1 , wherein the determining the at least one correction quantity comprises:comparing a first ...

Low cost position sensor and mobility device using the same

A low cost position sensor and a mobility device using the same are provided. The low cost position sensor comprises a rollable object, a container and a control circuit. The rollable object comprises a specific material. The container has a non-planar inner bottom portion. At least one sensor for detecting coordinates is disposed inside the container. The rollable object is disposed in the container. The sensor can detect the specific material. The control circuit is coupled to the sensor. The sensor detects the specific material to determine a coordinate position of the rollable object, and sends the coordinate position of the rollable object back to the control circuit. The control circuit determines a tilt angle of the container according to the coordinate position of the rollable object.

RANGING TO AN ELECTROMAGNETIC TARGET WITHOUT TIMING

A method for magnetic ranging includes switching an electromagnet deployed in a target wellbore between at least first and second states and acquiring a plurality of magnetic field measurements at a magnetic field sensor deployed on a drill string in a drilling wellbore while the electromagnet is switching. The magnetic field measurements may be sorted into at least first and second sets corresponding to the first and second states of the electromagnet. The first and second sets of magnetic field measurements are then processed to compute at least one of a distance and a direction from the drilling well to the target. The electromagnet may be automatically switched back and forth between the first and second states independently from the acquiring and sorting of the magnetic field measurements. 1. A method for magnetic ranging comprising:(a) switching an electromagnet deployed in a target wellbore between at least first and second states;(b) acquiring a plurality of magnetic field measurements at a magnetic field sensor deployed on a drill string in a drilling wellbore while the electromagnet is switching in (a);(c) sorting the plurality of magnetic field measurements into at least first and second sets corresponding to the first and second states of the electromagnet;(d) processing the first and second sets of magnetic field measurements to compute at least one of a distance and a direction from the drilling well to the target.2. The method of claim 1 , wherein the electromagnetic automatically switches back and forth between the at least first and second states in (a) and said switching is independent from said acquiring in (b) and said sorting in (c).3. The method of claim 2 , wherein the switching in (a) is asymmetric in that the electromagnet is in the first state for a longer time duration than the second state.4. The method of claim 1 , wherein the electromagnet is energized by a positively directed direct current in the first state and a negatively directed ...

MAGNETOMETER UNIT FOR ELECTRONIC DEVICES

In one example a magnetometer unit comprises logic, to receive first magnetic response data from a first magnetic sensor and second magnetic response data from a second magnetic sensor displaced from the first magnetic sensor, generate a composite response surface representation from the first magnetic response data and the second magnetic response data, and store the composite response surface representation in a non-transitory memory. Other examples may be described. 1. A magnetometer unit , comprising logic , at least partly including hardware logic , to:receive first magnetic response data from a first magnetic sensor and second magnetic response data from a second magnetic sensor displaced from the first magnetic sensor;generate a composite response surface representation from the first magnetic response data and the second magnetic response data; andstore the composite response surface representation in a non-transitory memory.2. The magnetometer unit of claim 1 , further comprising logic claim 1 , at least partly including hardware logic claim 1 , to use bounding values of the first magnetic response data and the second magnetic response data to generate the composite response surface.3. The magnetometer unit of claim 1 , further comprising logic claim 1 , at least partly including hardware logic claim 1 , to:receive first magnetic response data from the first magnetic sensor and second magnetic response data from the second magnetic sensor;generate a first response surface from the first magnetic response data and a second response surface from the second magnetic response data; andselect one of the first magnetic response data or the second magnetic response data as an output of the magnetometer unit.4. The magnetometer unit of claim 3 , further comprising logic claim 3 , at least partially including hardware logic claim 3 , configured to:compare the first response surface and the second response surface to the composite response surface.5. The magnetometer ...

METHOD FOR MACHINING A WORKPIECE

A system for machining a workpiece, 2. The system according to claim 1 , wherein claim 1 , in order to provide the at least two-dimensional coordinates system the system further comprises at least one coordinates sensor which can be placed in a working space in which the workpiece is arranged claim 1 , and the guide means and/or the marker detection device are designed to determine the position of the at least one coordinates sensor and/or to determine reference information transmitted by the at least one coordinates sensor.3. The system according to claim 2 , wherein the at least one coordinates sensor has fastening means for fastening to the workpiece and/or a base and/or at least one utility surface for placement on a base and/or the workpiece.4. The system according to claim 1 , wherein the at least one coordinates sensor is designed to transmit reference information in mutually angular directions and/or in mutually parallel planes claim 1 , wherein the marker detection device and/or the guide means are configured to detect this reference information.5. The system according to claim 1 , wherein the guide means of the hand-held power tool and/or the marker detection device comprise an orientation means for orientation relative to the at least two-dimensional coordinates system in a working space in which the workpiece is arranged claim 1 , wherein the orientation means are designed for detecting geometric contours of the working space and/or for receiving reference information characterising the position of the hand-held power tool and/or the marker detection device and/or the workpiece in the working space.6. The system according to claim 1 , wherein the marker detection device is designed to detect the coordinate data of the at least one workpiece marker after the reference has been positioned relative to the workpiece marker according to at least one triggering condition.7. The system according to claim 1 , wherein the triggering condition comprises an ...

LOCATION ESTIMATION APPARATUS, MOVING OBJECT, LOCATION ESTIMATION METHOD, AND COMPUTER-READABLE STORAGE MEDIUM

It includes an intensity pattern determination section to determine an intensity pattern indicating a distribution of a magnitude of a target quantity in at least a part of a moving path of the moving object, a subarea determination section to determine, among a plurality of subareas, one or more subareas having an intensity pattern which matches or is similar to an intensity pattern determined by the intensity pattern determination section based on map information which associates area identification information which identifies each of a plurality of subareas included in a target region having a predetermined geographic range and an intensity parameter indicating a magnitude of a target quantity premeasured in the subarea, and an output section to output, as a location of the moving object, one or more subareas determined by the subarea determination section. 1. A location estimation apparatus , comprising:an intensity information obtaining section to obtain intensity information indicating a magnitude of a target quantity detected by a detection section mounted to a moving object;a distance information obtaining section to obtain a distance information indicating a distance between two spots where each of two pieces of intensity information obtained by the intensity information obtaining section has been obtained;an intensity pattern determination section to determine, based on (i) a plurality of pieces of intensity information obtained by the intensity information obtaining section along at least a part of a moving path of the moving object and (ii) distance information corresponding to the plurality of intensity information obtained by the distance information obtaining section, an intensity pattern indicating a distribution of a magnitude of the target quantity along the at least a part of the moving path of the moving object;a subarea determination section to determine, among the plurality of subareas, one or more subareas having an intensity pattern which ...

CONTROL SYSTEM FOR CAPSULE ENDOSCOPE

A control device for a capsule endoscope is provided. The control device includes a balance arm device, a permanent magnet, a 2-DOF rotary platform and an examination bed. The bottom of the balance arm device is fixed, and the active end of the balance arm device connects with a boom. The 2-DOF rotary platform is fixed below the boom and the permanent magnet is located in the 2-DOF rotary platform. The examination bed is put below the 2-DOF rotary platform, and the area between the examination bed and the 2-DOF rotary platform is an examination area. 1. A control device for a capsule endoscope , comprising:a balance arm device, a permanent magnet and an examination bed;wherein the bottom of the balance arm device is fixed, and the active end of the balance arm device connects with a boom;wherein the permanent magnet is fixed below the boom;wherein the examination bed is put below the permanent magnet, and the area between the examination bed and the permanent magnet is an examination area.2. The control device of claim 1 , wherein the balance arm device is a pneumatic balance arm claim 1 , comprising a column and a chassis for support purpose claim 1 , and the top of the column connects with an upper balance arm and a lower balance arm parallel to each other.3. The control device of claim 2 , wherein the pneumatic balance arm further comprises a balance cylinder and a control box fixed on one side of the column claim 2 , wherein the control box is electrically connected to the balance cylinder claim 2 , and the balance cylinder is connected to the upper balance arm and the lower balance arm via a piston; wherein the control box controls the balance cylinder and drives the upper balance arm and the lower balance arm to move in vertical and horizontal directions.4. The control device of claim 2 , wherein the other ends of the upper balance arm and the lower balance arm connects with a rear terminal arm and a front terminal arm claim 2 , wherein the rear terminal arm ...

SYNCHRONIZATION OF MAGNETIC SENSOR SAMPLING FREQUENCY FOR BODY POSE TRACKING IN ARTIFICIAL REALITY SYSTEMS

Magnetic sensor synchronization techniques for pose tracking in artificial reality systems include managing and sending, by one or more primary magnetic sensors, a wireless synchronization signal to other magnetic sensors to trigger sensing sampling. The primary magnetic sensor may generate and send sensor data to a wireless data hub that operates as a sensor data collector and transmits data for pose tracking in the system. Each of the other (non-primary) magnetic sensors, in response to receiving the wireless synchronization signal, updates its sampling starting clock based on new synchronization timing. Each of the magnetic sensors sends generated sensor data to its corresponding primary sensor or wireless data hub according to a different schedule to avoid conflicts between the various magnetic sensors. The synchronization process may be repeated a number of times if a sensor fails to receive or respond to a synchronization signal. 1. A method comprising:receiving, by a primary magnetic sensor, an indication of a trigger event from an internal system;in response to receiving the indication, transmitting, by the primary magnetic sensor, a synchronization signal to each of a plurality of magnetic sensors, wherein the synchronization signal includes a sampling start time;in response to receiving the synchronization signal, determining, by each magnetic sensor of the plurality of magnetic sensors based on the sampling start time, a sampling time for the magnetic sensor;sampling, by each magnetic sensor of the plurality of magnetic sensors at the sampling time for the magnetic sensor, a magnetic field generated by a magnetic transmitter associated with the plurality of magnetic sensors to generate sensor data of the magnetic sensor;providing, by each magnetic sensor of the plurality of magnetic sensors, to the primary magnetic sensor, sensor data of the magnetic sensor, wherein the sensor data of the magnetic sensor is transmitted according to a transmission time ...

METHOD AND APPARATUS FOR INSPECTION OF SPHERICAL SURFACES

Disclosed are a method and an apparatus for inspection of workpieces and products having curved and, in particular, spherical surfaces. The method is based on scanning inspected objects with a narrow probing beam of electromagnetic radiation and concurrently measuring the radiation scattered on the surface. The method and apparatus improve the detectability of features and imperfections on inspected surfaces by providing invariable parameters and conditions of scanning, robust mechanical stability of scanning systems, high positioning accuracy of the probing electromagnetic beam and efficient collection of the scattered radiation. The apparatus allows surface defect classification, determining defect dimensions and convenient automation of inspection. 1. A method for inspection of spherical surfaces , the method comprises:providing an object with a spherical or curved surface for inspection,scanning the surface with a probing beam of electromagnetic radiation, the probing beam is directed onto the surface for inspection and illuminates the surface for inspection with a beam spot, the electromagnetic radiation of the probing beam scatters at the surface within the area of the beam spot and produces scattered electromagnetic radiation,dynamically determining instantaneous coordinates of the beam spot on the surface for inspection,dynamically measuring characteristic parameters of the scattered electromagnetic radiation,and synchronously recording the measured values of the characteristic parameters of the scattered electromagnetic radiation and the instantaneous coordinates of the beam spot at which the characteristic parameters of the scattered electromagnetic radiation are measured,whereinthe scanning is implemented by a combination of motions including a first motion and a second motion,the first motion is a spinning of the probing beam of electromagnetic radiation about a spin axis,the second motion is a repositioning of the spin axis with respect to the surface ...

Three dimensional mapping

Methods and apparatus are provided for locating the position, preferably in three dimensions, of a sensor by generating magnetic fields which are detected at the sensor. The magnetic fields are generated from a plurality of locations and, in one embodiment of the invention, enable both the orientation and location of a single coils sensor to be determined. The present invention thus finds application in many areas where the use of prior art sensors comprising two or more mutually perpendicular coils is inappropriate.