Position detecting apparatus

The present invention provides a single component implementing highly precise pulse detection for rotational or liner position detecting apparatuses for jog dials and mechanical products. Focusing on the fact that the phase difference between the magnetic fields in circumferential and radial directions generated by a magnetized ring is precisely 90 degrees, a position detecting apparatus of the present invention includes two Hall elements placed at a distance; a protective film provided on magnetic sensitive portions of the two Hall elements to cover the magnetic sensitive portions; a thin-film magnetic plate placed on the protective film to cover the magnetic sensitive portions of the two Hall elements; and further a processing circuit calculating the sum and difference of the signals from the two Hall elements to generate signals having an accurate phase difference of 90 degrees. The position detecting apparatus can therefore detect the rotation direction and precise rotation angle.

Method for positioning a magnetic device

A method for positioning a magnetic device providing an impulse ring forming a coder and at least three magnetic detection cells forming a magnetic sensor. The impulse ring being provided with a target having pairs of magnetic poles. The number of pair of magnetic poles being counted. The magnetic detection cells are positioned around the target of the impulse ring according to the number of pair of magnetic poles and according to the number of detection cells.

Position-measuring device

A position-measuring device includes a carrier body and scanning units movable relative thereto. At least three surfaces of the carrier body each carry a first and second measuring graduation, each having a series of graduation lines. Each of the measuring graduations is associated with a scanning unit for scanning the respective measuring graduation at a scanning location such that, for each surface, two scanning units are disposed for scanning the respective measuring graduations. In each case, these two scanning units are disposed in such a way, and the graduation lines of the two measuring graduations are inclined with respect to each other in such a way, that two normal planes extending respectively in the direction of the respective graduation lines through the respective scanning locations of the two scanning units have a common axis of intersection, whereby the three resulting axes of intersection extend through a common point.

MAGNETIC FIELD SENSOR WITH IMPROVED RESPONSE IMMUNITY

A magnetic field sensor includes a plurality of magnetoresistance elements, each having at least one characteristic selected to provide a respective, different response to an applied magnetic field, wherein each of the plurality of magnetoresistance elements is coupled in parallel. Illustrative characteristics selected to provide the respective responses include dimensions and/or construction parameters such as materials, layer thickness and order, and spatial relationship of the magnetoresistance element to the applied magnetic field. A method includes providing each of a plurality of magnetoresistance elements with at least one characteristic selected to provide a respective, different response to an applied magnetic field, wherein each of the plurality of magnetoresistance elements is coupled in parallel. 1. A magnetic field sensor comprising a plurality of magnetoresistance elements , each having a respective length and width selected to provide a respective , different response to an applied magnetic field , wherein each of the plurality of magnetoresistance elements is coupled in parallel , wherein a width of a first one of the plurality of magnetoresistance elements is different than and a multiple of a width of a second one of the plurality of magnetoresistance elements , and wherein a length of the first one of the plurality of magnetoresistance elements is the same as a length of the second one of the plurality of magnetoresistance elements.2. The magnetic field sensor of claim 1 , wherein the respective claim 1 , different responses of the plurality of magnetoresistance elements to the applied magnetic field differ in linearity.3. The magnetic field sensor of claim 1 , wherein each of the plurality of magnetoresistance elements has a substantially similar resistance when the applied magnetic field has a magnetic field strength of about zero Gauss.4. The magnetic field sensor of claim 1 , wherein at least one of the plurality of magnetoresistance elements ...

ARRANGEMENT, METHOD AND SENSOR FOR MEASURING AN ABSOLUTE ANGULAR POSITION USING A MULTI-POLE MAGNET

A system for measuring an angular position of a rotor with respect to a stator, wherein the rotor is rotatable around a rotation axis, the system comprising: a magnetic source mounted on the rotor, having at least four magnet poles and providing a periodically repetitive magnetic field pattern with respect to the rotation axis; a sensor mounted on the stator and comprising a plurality of sensor elements for measuring at least one magnetic field component of the magnetic field and for providing a measurement signal thereof; the sensor being located substantially centered around the rotation axis, in a plane substantially perpendicular to the rotation axis at a first distance from the magnetic source; the sensor elements being located substantially on a circle at a second distance from the rotation axis; a calculator that determines the angular position by calculating it from the measurement signals. 1. A magnetic position sensor , for measuring an angular position of a magnetic source being a multi-pole magnet having at least four magnet poles ,the magnetic position sensor comprising a plurality of sensor elements, located substantially on a circle, for measuring at least one magnetic field component of a magnetic field provided by the magnetic source and for providing measurement signals indicative of the at least one magnetic field component, wherein the plurality of sensor elements are partitioned in at least a first group and a second group, each element within each group being located at equidistant angular positions on the entire circle, wherein the sensor elements of the first group are interleaved with the sensor elements of the second group,the magnetic position sensor comprising a calculator configured for determining the angular position based on the measurement signals provided by the sensor elements of the first group and on the measurement signals provided by the sensor elements of the second group.2. The magnetic position sensor according to claim 1 , ...

Inductive Sensor Arrangement

An inductive sensor device has a scale with scale elements that provide a field pattern in at least one line extending in a measuring direction. The inductive sensor device contains at least one receive circuit with at least one receive coil. The receive coil and the scale are moveable relative to each other in the measuring direction. The receive coil extends from a first end to a second end in the measuring direction. It has a first end section directly adjacent to the first end and a second end section directly adjacent to the second end, and middle section. Each of the sections contains at least one loop of the receive coil. In the end sections the loop area decreases from loop to loop from the loop next to the middle section toward the respective end. Such a loop design compensates for misalignments between the receive coil and the scale.

Optical position-measuring device

An optical position-measuring device for determining the relative position of two objects includes two scanning units which are connected to one of the objects and each include a light source, one or more gratings and a detector assembly. A scale is connected to the other object and has two tracks each containing incremental graduations extending along a first one of the measurement directions. The incremental graduations each are composed of graduation regions which have different optical properties and are periodically arranged along an incremental graduation direction. The two incremental graduation directions form an angle of between 0° and 90° relative to each other. Each of the two incremental graduations has a reference mark integrated therein such that scanning of the reference mark allows a reference signal to be generated at a defined reference position along each of the measurement directions. The reference marks include both aperiodic and periodic portions.

Contamination and defect resistant rotary optical encoder configuration for providing displacement signals

An optical encoder configuration comprises a rotary scale, an illumination source, and a photodetector configuration. The illumination source is configured to output collimated light to the scale at a first illumination region, which is then output to the scale at a second illumination region from which the scale outputs scale light that forms a detector fringe pattern comprising periodic high and low intensity bands that extend over a relatively longer dimension along the rotary measuring direction and are relatively narrow and periodic along a detected fringe motion direction transverse to the rotary measuring direction. The high and low intensity bands move along the detected fringe motion direction as the scale grating displaces along the rotary measuring direction. The photodetector configuration is configured to detect a displacement of the high and low intensity bands and provide respective spatial phase displacement signals that are indicative of the rotary scale displacement.

SENSOR DEVICE FOR SENSING A SELECTOR LEVER POSITION AND SELECTOR LEVER DEVICE FOR A MOTOR VEHICLE

In one general aspect, the present disclosure is related to a sensor device for detecting selector lever positions of a selector lever for a motor vehicle. The sensor device may include at least four sensors and a code carrier, where the code carrier is arranged such that it is faced by the at least four sensors. The code carrier may be movable with respect to the at least four sensors. The code carrier may be attached to the selector lever. The code carrier may include several coding areas each with an encoding. The code carrier can thus be referred to as coding carrier. The encoding of the individual coding areas can be read by using the sensors. 1. A sensor device for detecting positions of a selector lever , the sensor device comprising:at least four sensors; anda code carrier arranged such that each of the four sensors faces the code carrier, the code carrier being movable through at least four positions with respect to the at least four sensors, and the code carrier comprising:a plurality of coding areas each having a encoding, where at least one coding area is faced by each sensor of the at least four sensors when the code carrier is in each of the at least four predetermined positions,wherein each sensor of the at least four sensors is configured to read the encoding of the respective coding area such that a sensor code is formed, the sensor code corresponding to the position of the code carrier;wherein the code carrier is distributed on at least two tracks extending parallel to one another, andwherein the at least four sensors and the coding areas are arranged such that a first sensor code, which is assigned to a starting position of the code carrier, has a Hamming distance of four with respect to a second sensor code, wherein the second sensor code is assigned to a second position of the code carrier that is sequential with respect to the starting position.2. The sensor device according to claim 1 , wherein the sensor device has exactly four sensors for ...

Encoder

A magnetic medium is magnetized in the relative movement direction at a predefined pitch λm and a magnetic sensor includes plural magnetoresistive elements whose electrical resistance value changes depending on a magnetic field at a place where the magnetoresistive element is disposed. A position where the magnetoresistive element is disposed is defined as a reference position and, in addition to the magnetoresistive element of this reference position, the magnetoresistive elements as harmonic reducing patterns are disposed at the following positions, with P(n) defined as the n-th prime: a position offset by λm/(2·P(n)) from the reference position toward at least one side of the relative movement direction, wherein N≧n>1 and N is a natural number satisfying N>3, and a position further offset by λm/(2·P(L+1)) from a position offset by λm/(2·P(L)), wherein 1<L<N.

Rotational Angle Sensor

A rotational angle sensor includes a stator element and a rotor element. The stator element has a stator transmitting coil, a stator circuit board with first and second planes, and at least two identically configured stator receiving coils arranged within the stator transmitting coil on the stator circuit board angularly offset from each other. The rotor element is mounted rotatably about a rotational axis relative to the stator element. The stator transmitting coil is inductively coupled to the stator receiving coils via the rotor element such that the inductive coupling is configured with reference to a rotational angle between the stator element and the rotor element so that the stator transmitting coil induces at least two angle-dependent alternating voltages in the stator receiving coils. The stator transmitting coil has coil conducting tracks positioned on the first and second planes of the stator circuit board. The coil conducting tracks on the first plane are interrupted in a passage region, and are connected to diverting tracks on the second plane by vias. The stator receiving coils have connection conductors on the first plane lead from stator receiving coil connections within the stator transmitting coil, through the passage region, and to circuit board connections for the stator receiving coils. Each connection conductor is curved so as to form a conductor loop in order to compensate differently sized coil areas of the stator receiving coils formed by connection conductors of different lengths within the stator transmitting coil.

Linear Encoder Force Transducer

In implementations of a linear encoder force transducer, an encoder component generates light that enters a light input window of an encoder strip, and reflective surfaces disperse the light internally within the encoder strip. The encoder strip has etched lines formed cross-width of the encoder strip for emitted light that exits the encoder strip. The encoder component has gradated slots through which the emitted light from the encoder strip is detected by an array of photo transistors, each of the gradated slots corresponding to one of the photo transistors in the array of photo transistors. An encoder module can determine a linear displacement, such as representative of a force applied to a pen tip of a computer input pen, based on one or more of the photo transistors detecting the emitted light as the etched lines of the encoder strip move relative to the gradated slots of the encoder component.

ROTATION ANGLE CAPTURE WITH A 3-D SENSOR AND AN AXIS OF ROTATION PARALLEL TO A PRINTED CIRCUIT BOARD

In a sensor arrangement for determining a rotation angle of a magnet about an axis of rotation, with a sensor for capturing a radial component and a tangential component of the measuring field of the magnet and for determining the rotation angle on the basis of an atan function, the sensor is mounted, at a radial distance from the axis of rotation, on a printed circuit board parallel to the axis of rotation and is offset by an axial distance. In a design method, an initial axial distance and radial distance are selected, the profile is determined, and the axial distance and/or the radial distance is/are iteratively optimized. A selector lever is coupled in terms of movement to the magnet of the sensor arrangement. The sensor arrangement is optimized and installed with the selector lever, and a compensation arrangement is adjusted. 1. A sensor arrangement for determining a rotation angle of a magnet about an axis of rotation relative to a base carrier , the sensor arrangement comprising:the base carrier;the magnet configured to rotate relative to the base carrier about the axis of rotation to generate a magnetic measuring field; capture a radial component and a tangential component of the measuring field with respect to the axis of rotation; and', 'determine the rotation angle from the captured radial component and the captured tangential component on the basis of an arctangent function,, 'a sensor positionally fixed relative to the base carrier and configured towherein the sensor is mounted and electrically contact-connected next to the axis of rotation, with a radial distance from the axis of rotation, on a printed circuit board which is positionally fixed with respect to the base carrier, wherein a surface of the sensor runs parallel and tangentially with respect to the axis of rotation, andwherein the sensor is arranged offset with respect to a central plane, lying transversely with respect to the axis of rotation, of the magnet in the axial direction of the axis ...

Rotation detection apparatus, operation apparatus, lens apparatus and image pickup apparatus

The rotation detection apparatus including an annular member, a scale member having flexibility and being fixed to a circumferential portion of the annular member, and a detector facing the scale member and configured to detect relative rotation between the scale member and the detector. The circumferential portion of the annular member includes multiple convex portions and multiple concave portions along a circumferential direction of the annular member. The scale member is in contact with the multiple convex portions. Both ends, in the circumferential direction, of the scale member are fixed to the circumferential portion.

Scale, displacement detection apparatus, lens apparatus, image pickup system, and assembling apparatus

A scale is used in a displacement detection apparatus ( 100 ) which detects a position of an object, the scale includes a pattern periodically formed in a measurement direction (an X direction), and the pattern is configured so as to change a physical property in a direction (a Y direction) perpendicular to the measurement direction without changing phase information in the measurement direction when a detector reading the pattern moves relative to the pattern in the direction perpendicular to the measurement direction.

Encoder, motor with encoder, and servo system

The encoder includes a plurality of slit tracks, a point light source, two first light-receiving arrays, two second light-receiving arrays, and a third light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The two first light-receiving arrays are disposed sandwiching the point light source in a width direction substantially orthogonal to the measurement direction. The two second light-receiving arrays are disposed sandwiching the point light source in the measurement direction. The third light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern that differs in pitch from other incremental patterns, and is disposed at a position in a direction where the first light-receiving array is disposed than the point light source.

Blade angle position feedback system with embedded markers

There is provided a blade angle feedback system for an aircraft-bladed rotor rotatable about a longitudinal axis and having an adjustable blade pitch angle. A feedback device is coupled to rotate with the rotor and to move along the axis with adjustment of the blade pitch angle. The feedback device comprises a body having position marker(s) embedded therein, the body made of a first material having a first magnetic permeability and the position marker(s) comprising a second material having a second magnetic permeability greater than the first. Sensor(s) are positioned adjacent the feedback device and configured for producing, as the feedback device rotates about the axis, sensor signal(s) in response to detecting passage of the position marker(s). A control unit is communicatively coupled to the sensor(s) and configured to generate a feedback signal indicative of the blade pitch angle in response to the sensor signal(s) received from the sensor(s).

STROKE DETECTOR

A stroke detector includes: a cylinder tube; a piston rod configured to advance and retract with respect to the cylinder tube; a scale that is formed on the piston rod; and a first MR sensor and a second MR sensor that are provided on the cylinder tube. The scale has a first edge portion that is opposed to the first MR sensor and a second edge portion that extends at a different angle from that of the first edge portion and that is opposed to the second MR sensor. 1. A stroke detector comprising:a first member;a columnar second member configured to advance and retract with respect to the first member;a scale that is formed on a surface of the second member along an advancing/retracting direction of the second member; anda first detecting element and a second detecting element that are provided on the first member so as to oppose to the scale, the first detecting element and the second detecting element being configured to change outputs therefrom in accordance with opposing area of the scale; whereinthe scale has a first edge portion that is inclined with respect to the advancing/retracting direction of the second member and a second edge portion that extends at a different angle from that of the first edge portion with respect to the advancing/retracting direction of the second member,the first edge portion is formed so as to always oppose to the first detecting element within an advancing/retracting range of the second member, and the second edge portion is formed so as to always oppose to the second detecting element within the advancing/retracting range of the second member,the advancing/retracting direction of the second member in which the area of the scale opposing to the first detecting element is gradually increased and the advancing/retracting direction of the second member in which the area of the scale opposing to the second detecting element is gradually increased are opposite directions,the scale has a first scale having the first edge portion and a ...

Optical encoder

The present invention provides an optical encoder, mainly characterized in that a second light-transmitting region has two individual circular areas, and the circular areas correspond to positions of a same period that sensing light passes through a code disc, so as to obtain an analog signal closer to a sine wave as well as achieve an easy manufacturing process.

Magnetic Encoder and Apparatus Having the Same

A magnetic encoder has an annular main body and a magnetic encoding unit. The main body is made of material with magnetic permeability, surrounds a central axis, and includes a first surface and a second surface opposite to said first surface. The magnetic encoding unit is disposed on one of the first surface and the second surface of the main body, and includes a plurality of first and second magnetic poles, each of which is annular and is centered at the central axis. The first and second magnetic poles are arranged in an alternating sequence.

POSITION/DISPLACEMENT TRANSDUCER APPARATUS, AND RELATED SYSTEM AND METHOD

A position/displacement transducer apparatus includes encoders arranged along a measurement path along which a position/displacement encoding periodic array is arranged, having contiguous elements with alternate dual characteristics. There is at least one transition region of discontinuity in periodicity of the periodic array and/or unreadable, the periodic array subject to a mutual motion with respect to encoders along the measurement path, defining the ends of a reading window having a greater length than the estimated maximum size of the transition region so they are not simultaneously involved by the transition region during mutual motion. A controller emits a transduced position/displacement on the basis of signals from encoders and switches from use of one encoder to use of the other to manage the presence of the transition region. The controller switches from default use temporarily to use of the upstream encoder while the downstream encoder is at the transition region. 1. A position/displacement transducer apparatus comprising:a pair of encoders arranged along a measurement path along which a position/displacement encoding periodic array is arranged, having contiguous elements with alternate dual characteristics, wherein along the measurement path there is at least one transition region of discontinuity in periodicity of the periodic array and/or unreadable, the periodic array being subject, in use, to a mutual motion with respect to the encoders along the measurement path, the encoders defining the ends of a reading window having a greater length than the estimated maximum size of the transition region so that they are not simultaneously involved by the transition region during the mutual motion,a controller which emits a transduced position/displacement on the basis of signals from the encoders, and which switches from use of one encoder to use of the other encoder in order to manage the presence of the transition region, whereinthe controller switches ...

OPTICAL ENCODER

An optical encoder includes an encoding disk and an optical detector disposed to correspond to the encoding disk. The optical detector includes a plurality of optical sensors arranged to form an optical sensor array. The optical detector is provided to receive light. The optical detector includes at least one optical sensor arranged to form at least one sensor array. The width of the sensor array corresponds to an interpolation period of the optical encoder. 1. An optical encoder , comprising:an encoding disk; andan optical detector, disposed to correspond to the encoding disk and configured to receive light, wherein the optical detector comprises at least one optical sensor arranged to form at least one optical sensor array, and a width of the at least one optical sensor array corresponds to an interpolation period of the optical encoder.2. The optical encoder according to claim 1 , wherein a quantity of the at least one optical sensor is plural claim 1 , a quantity of the at least one optical sensor array is plural claim 1 , the optical sensors are arranged to form the optical sensor arrays claim 1 , and the width of each of the optical sensor arrays corresponds to the interpolation period of the optical encoder.3. The optical encoder according to claim 2 , wherein each of the optical sensors is a complementary metal-oxide-semiconductor (CMOS) optical sensor.4. The optical encoder according to claim 2 , wherein the optical sensor arrays comprise a first optical sensor array and a second optical sensor array adjacent to each other claim 2 , both a distance between two of the optical sensors that are adjacent to each other in the first optical sensor array and a distance between two of the optical sensors that are adjacent to each other in the second optical sensor array are smaller than a distance between the first optical sensor array and the second optical sensor array.5. The optical encoder according to claim 2 , wherein the encoding disk comprises an encoding ...

Magnetic angle sensing system and method of operation

A magnetic angle sensing system for detecting a rotation angle of a magnetic field source arranged rotatably around a rotation axis, the magnetic angle sensing system including at least two magnetic field sensing elements that are located in/on a plane, are not arranged on a single straight line through the rotation axis, and are configured to provide output signals that are functions of the same magnetic field component which is in parallel to the rotation axis. The system also including a processor that is arranged to determine the rotation angle from an angle between a pointer and a reference direction, wherein the pointer is determined based on the output signals of the at least two magnetic field sensing elements.

Rotation-Angle Sensor, Stator Element and Rotor Element for Same

A rotation-angle sensor comprises a stator element and a rotor element mounted to rotate relative to the stator element about an axis of rotation. The rotation angle is detectable by an inductive coupling between the rotor element and the stator element. A compensation element is located on the stator element and has a compensation transmitter coil to emit an electromagnetic compensation alternating field and a compensation receiver coil to receive electromagnetic alternating fields. The rotor element has a first electrically conductive portion, which is both located on the rotor element and inductively coupled to the compensation transmitter coil and the compensation receiver coil such that when the compensation transmitter coil emits the electromagnetic compensation alternating field, an alternating voltage induced in the compensation receiver coil is primarily dependent on a relative mutual radial location of the stator element and the rotor element with respect to the axis of rotation. 2. The rotation angle sensor as claimed in claim 1 , wherein:the stator element comprises at least one angle detection transmitting coil configured to emit an electromagnetic angle detection alternating field, and at least one angle detection receiving coil configured to detect electromagnetic alternating fields,the rotor element comprises at least one second electrically conducting section,the at least one second electrically conducting section is a circular ring sector with respect to the axis of rotation,the at least one second electrically conducting section is inductively coupled with the at least one angle detection receiving coil such that, when the electromagnetic angle detection alternating field is emitted by the at least one angle detection transmitting coil, at least one first alternating voltage is induced in the at least one angle detection receiving coil, andthe at least one second electrically conducting section is arranged at the rotor element such that the first ...

Arrangement for detecting the angular position of a rotatable component

An arrangement for detecting the angular position of a rotatable component includes: a magnet, configured to generate a magnetic field, and a sensor assembly, configured to detect the magnetic field, and to supply therefrom an angle signal corresponding to the angular position of the component. The sensor assembly has a first sensor group, including a first magnetically sensitive element, a second magnetically sensitive element, and a third magnetically sensitive element, a second sensor group, having a fourth magnetically sensitive element, a fifth magnetically sensitive element, and a sixth magnetically sensitive element, and an evaluation unit, which is connected to each of the magnetically sensitive elements of the first sensor group and the magnetically sensitive elements of the second sensor group and supplies the angle signal corresponding to the angular position of the component. 110-. (canceled)11121001. An assembly () for capturing the angular position (φ) of a component () that is rotatable about an axis of rotation () , the assembly () comprising:{'b': 10', '20, 'a magnet () configured to produce a magnetic field (); and'}{'b': 30', '10', '20', '200', '100', '48', '2', '10', '30', '100', '30, 'claim-text': [{'b': 31', '200', '32', '100', '33', '32', '100', '100', '34', '32', '33', '32', '33', '34', '20', '202, 'a first sensor group () arranged in the measuring plane (), the first sensor group comprising a first magnetically sensitive element () arranged at a predetermined distance (R) from the axis of rotation (), a second magnetically sensitive element () arranged opposite to the first magnetically sensitive element () relative to the axis of rotation (), the second magnetically sensitive element being arranged at the predetermined distance from the axis of rotation (), and a third magnetically sensitive element () arranged centrally between the first magnetically sensitive element () and the second magnetically sensitive element (), wherein the first ...

POSITION DETECTING DEVICE AND LINEAR CONVEYOR DEVICE PROVIDED WITH SAME

The linear conveyor device includes a position detecting device including a scale attached to a slider, and a sensor structural body including a sensor and a driver. The driver is provided with a first and a second signal processing units, and a signal comparison processing unit. The first signal processing unit performs predetermined first interpolation processing on an output signal from a first sensor, generates and outputs first positional data. The second signal processing unit performs predetermined second interpolation processing on an output signal from a second sensor, generates second positional data, and outputs the second positional data. The signal comparison processing unit recognizes the first positional data as positional information of the slider, generates identification information unique to the slider, and outputs the identification information, where the identification information corresponds to a difference between the first positional data and the second positional data. 1. A position detecting device that detects a position of a slider that moves along a predetermined moving direction , the position detecting device comprising:a scale that is attached to the slider and includes a first track and a second track adjacent to each other along a direction perpendicular to the moving direction, the first track being composed of scale marks lined along the moving direction at a first interval, the second track being composed of scale marks lined along the moving direction at a second interval;a processor configured to detect the first track to generates first positional data corresponding to the first interval and detect the second track to generate second positional data corresponding to the second interval; andan information processor configured to recognize the first positional data as positional information of the slider, generate identification information unique to the slider, and output the identification information, the identification ...

ENCODER APPARATUS

An encoder apparatus including a scale and a readhead including a sensor including an array of sensor elements for detecting a scale signal falling on the sensor, configured such that the sensor elements' outputs that are used to determine the relative position of the scale and readhead are weighted such that the influence of the sensor elements on the determined relative position of the scale and readhead varies across the array according to a predetermined non-rectangular window function that is configured to reduce the adverse effect of undesirable frequencies in the scale signal so as to thereby reduce the encoder apparatus' sub-divisional error. 1. An incremental encoder apparatus comprising a scale and a readhead comprising a sensor comprising an array of sensor elements for detecting a scale signal falling on the sensor which is used to determine the relative position of the scale and readhead , in which the apparatus is configured such that the output of the sensor along its length is weighted according to a window function that is configured to reduce the adverse effect of undesirable frequencies in the scale signal so as to thereby reduce the encoder apparatus' sub-divisional error , in which the weighting is configured such that the influence of the sensor output on the determined relative position predominantly decreases towards the ends of the sensor.2. An incremental encoder apparatus as claimed in claim 1 , in which the weighting according to the window function is configured to suppress the side lobes of the spatial frequency response of the sensor.3. An incremental encoder apparatus as claimed in claim 1 , in which the magnitude of at least the primary side lobe of the sensor's spatial frequency response is not more than 10% of the magnitude of the main lobe of the sensor's spatial frequency response.4. An incremental encoder apparatus as claimed in claim 1 , in which the weighting is configured such that the influence of the output from the sensor ...

SENSOR SYSTEM FOR ROTATIONAL SPEED MEASUREMENT HAVING A POLE WHEEL WITH A LINEARIZED MAGNETIC FIELD

A sensor system () for measuring the rotational speed of a rotatable component having a pole wheel () comprising a carrier () with at least one path of alternating magnetic north and south poles (), and at least one magnetic field sensor () for sampling the path of the pole wheel () is provided. The sensor system () provides that the rotational direction in front of and behind the magnetic field sensor () a ferromagnetic flux-conducting component () is arranged in each case opposite the path, the ferromagnetic flux-conducting components () being arranged in the installation space between the magnetic field sensor () and the pole wheel (), the distance between the ferromagnetic flux-conducting components () corresponding to the width of one magnetic pole () of the pole wheel (). 19-. (canceled)10. A sensor system for measuring the rotational speed of a rotatable component , having a pole wheel , the sensor system including:a carrier with at least one path of alternating magnetic north and south poles;at least one magnetic field sensor for sampling the path on the carrier of the pole wheel;ferromagnetic flux conductors situated upstream and downstream from the magnetic field sensor, opposite the path, in a rotational direction, the ferromagnetic flux conductors being situated at least partially in an installation space between the magnetic field sensor and the carrier, viewed in a radial direction, and a distance between the ferromagnetic flux conductors corresponding to a length of a magnetic pole of the pole wheel in the rotational direction.11. The sensor system as recited in wherein an air gap between the magnetic field sensor and the pole wheel is larger than the air gap between the ferromagnetic flux conducting elements and the pole wheel.12. The sensor system as recited in wherein the flux conductors are rod-shaped.13. The sensor system as recited in wherein a length of the flux conductors corresponds to a path width of a magnetic pole.14. The sensor system as ...

Reference signal generation apparatus and reference signal generation system

A reference signal generation circuit generates a reference signal from a reading result of the reference point detection pattern. The first light-receiving element array includes a first light-receiving element that outputs a first signal, and a second light-receiving element that is disposed in a first direction of the first light-receiving element and outputs a second signal. A second light-receiving element array includes a third light-receiving element that outputs a third signal, and a fourth light-receiving element that is disposed in the first direction of the third light-receiving element and outputs a fourth signal. The second light-receiving element array is disposed in a second direction of the first light-receiving element array. The reference signal generation circuit outputs a reference signal that starts at a period when levels of the first and second signal become equal and ends at a period when levels of the third and fourth signal become equal.

ARRANGEMENT, METHOD AND SENSOR FOR MEASURING AN ABSOLUTE ANGULAR POSITION USING A MULTI-POLE MAGNET

A system for measuring an angular position of a rotor with respect to a stator, wherein the rotor is rotatable around a rotation axis, the system comprising: a magnetic source mounted on the rotor, having at least four magnet poles and providing a periodically repetitive magnetic field pattern with respect to the rotation axis; a sensor mounted on the stator and comprising a plurality of sensor elements for measuring at least one magnetic field component of the magnetic field and for providing a measurement signal thereof; the sensor being located substantially centered around the rotation axis, in a plane substantially perpendicular to the rotation axis at a first distance from the magnetic source; the sensor elements being located substantially on a circle at a second distance from the rotation axis; a calculator that determines the angular position by calculating it from the measurement signals. 1. A system for measuring an angular position of a rotor with respect to a stator , wherein the rotor is rotatable around a rotation axis , the system comprising:a magnetic source mounted on the rotor for creating a magnetic field, the magnetic source being a multi-pole magnet having at least four magnet poles and providing a periodically repetitive magnetic field pattern with respect to the rotation axis,a sensor mounted on the stator and comprising a plurality of sensor elements for measuring at least one magnetic field component of the magnetic field and for providing a measurement signal indicative of the at least one magnetic field component,the sensor being located substantially centered around the rotation axis and being located in a plane substantially perpendicular to the rotation axis at a first distance from the magnetic source,the sensor elements being located substantially on a circle at a second distance from the rotation axis, and oriented for detecting the at least one magnetic field component,a calculator that determines the angular position by ...

Sensor and method of manufacturing sensor

A sensor including: a generating unit; a detecting unit that detects the object to be detected generated by the generating unit; and a substrate at which the generating unit and the detecting unit are provided. The substrate is a flexible substrate that includes a first portion provided with the generating unit and a second portion provided with the detecting unit, the first portion and the second portion being integrated, and that takes a curved shape or a bent shape in which a surface of the first portion at which the generating unit is provided and a surface of the second portion at which the detecting unit is provided face each other. A plate support member is attached to a back-side surface of at least one of the surface of the first portion and the surface of the second portion.

Sensor-bearing unit, mechanical system comprising such unit and method for manufacturing such unit

A sensor-bearing unit providing: a bearing centered on a rotation axis; a sensor device including a differential detection cell that has a structural pitch and defines a pitch plane extending along the structural pitch and along a reading direction; and an impulse ring having a magnetic pattern that includes positive poles and negative poles separated by pattern borders and which defines a tangent plane perpendicular to the pitch plane. The sensor device and the impulse ring are configured for tracking a rotation of the bearing around the rotation axis, the differential detection cell of the sensor device reading the magnetic pattern of the impulse ring along the reading direction. Each pattern border defines a nonzero pattern angle relative to the pitch plane. The invention also concerns a mechanical system with such an impulse ring. The invention also concerns a method for manufacturing such an impulse ring.

Automotive magnetic shield

A linear magnetic sensor shield system comprises first and second shield parts. The system may include first and second field sensor assemblies, each having field sensors disposed therein. The first shield part may be disposed adjacent to a first side and a third side of the first field sensor assembly, and the second shield part may be disposed adjacent to a second side of the second field sensor assembly. The shield parts may be formed of mu metal, by of example, or they may have a curved shape or a thickness in the range of about 0.015 inch to about 0.030 inch. A torque transmitting device is also provided.

Rotary position sensor

A rotary position sensor comprises a magnetic sensor for generating two independent signals indicative of at least two different order magnetic fields, and a magnetic assembly forming a first magnetic field component having a first order at the location of the magnetic sensor, in which the first magnetic field component is rotatable relative to the magnetic sensor by receiving a first angle. The magnetic assembly is also adapted for forming a second magnetic field component having a second order, different from the first order, at the location of the magnetic sensor, in which the second magnetic field component is rotatable relative to the magnetic sensor and the first magnetic assembly by receiving a second angle. The position sensor comprises a processor for combining the two independent signals to produce a unique system state representative of the first and second angle.

REDUNDANT FAULT DETECTION DEVICE AND METHOD

An integrated circuit for error detection comprises an input for receiving two signals, in which a first signal is representative of a physical quantity in a first range and a second signal is representative of the physical quantity in a second range. The first range and second range are different ranges that overlap. The circuit comprises a processor configured to detect an inconsistency between the two signals by taking said first and second range into account, in which this inconsistency is indicative of an error. 1. An integrated circuit for error detection , the integrated circuit comprising:an input for receiving two signals, in which a first signal of said two signals is representative of a physical quantity in a first range and a second signal of said two signals is representative of said physical quantity in a second range, wherein said first range and said second range are different ranges that overlap,a processor configured to detect an inconsistency between the two signals by taking said first and second range into account, said inconsistency being indicative of an error.2. The integrated circuit of claim 1 , wherein said processor is configured to compare the first signal with the second signal after a suitable transformation of either or both of the first signal and the second signal into the first range claim 1 , into the second range or into a common third range claim 1 , in which said transformation or transformations take the first range and/or the second range into account.3. The integrated circuit of claim 1 , wherein said processor is configured to calculate a first value representative of said physical quantity based on said first signal by taking said first range into account and to calculate a second value representative of said physical quantity based on said second signal by taking said second range into account.4. The integrated circuit of claim 3 , wherein said processor is adapted for detecting said inconsistency between the two signals ...

Sensor system comprising offaxis insensitive multipole magnet

A sensor system comprises a magnetic field generator and a sensor device arranged at a distance from said magnetic field generator and adapted for measuring or determining at least one magnetic field component and/or at least one magnetic field gradient component. The magnetic field generator comprises a multi-pole magnet having a number N of pole pairs that are axially magnetized to generate an N-pole magnetic field that is substantially rotationally symmetric around an axis. The magnet comprises a plurality of grooves and/or elongate protrusions that are arranged in a rotationally symmetric pattern around the axis to provide a substantially constant magnetic field gradient in a central region around said axis.

Resolver

Disclosed is a resolver robust against external noise and having a reduced error in the detection of a rotation angle, which includes a stator made of a magnetic material and having a plurality of teeth and a plurality of slots alternately formed at an inner side thereof, insulation covers respectively having a tooth insulating unit formed at an inner side thereof corresponding to the teeth and mounted to the stator at both upper and lower surfaces of the stator, and coils wound on the teeth with the tooth insulating unit being interposed therebetween, wherein regarding winding widths of coils located at an outermost circumference among the wound coils, a ratio of a shortest winding width to a longest winding width is 0.69 or above and 1 or below.

Encoder

An encoder includes: a base member; a printed board fixed directly or indirectly to the base member; and a cover member fixed to the base member while the printed board is arranged inside the cover member. A first enclosed space and a second enclosed space are formed inside the cover member. The first enclosed space is space in which the printed board is arranged entirely or partially in an enclosed state. The second enclosed space is formed between the first enclosed space and the cover member.

Cover, seal fitting device, and seal fitting method

A cover having a container portion whose one end is opened and whose other end is closed by a bottom surface, includes: an annular groove formed into an annular shape along an outer circumference of an opening of the container portion; a plurality of communicating portions that are formed in a side wall partitioning the annular groove and the container portion so as to connect the annular groove and the container portion in a radial direction; and an annular seal member fitted to the annular groove.

Magnetic sensor system for measuring linear position

A magnetic sensor system may include a first magnetic sensor and a second magnetic sensor. The first magnetic sensor may include a first triplet of sensor elements for measuring a magnetic field. The first triplet of sensor elements may be aligned linearly along a direction of movement. A first pair of differential signals, output by the first magnetic sensor, may indicate a position of the magnetic sensor system, along the direction of movement, relative to a magnetic pole pair. The second magnetic sensor may include a second triplet of sensor elements for measuring the magnetic field. The second triplet of sensor elements may be aligned linearly along the direction of movement. The second magnetic sensor may be positioned relative to the first magnetic sensor such that a second pair of differential signals, output by the second magnetic sensor, indicates a position of the magnetic sensor system across multiple pole pairs.

PROTECTIVE COVER AND BEARING DEVICE INCLUDING PROTECTIVE COVER

The present invention is intended to provide a protective cover, comprising an inner ring with an inner ring track surface A on an outer peripheral surface; an outer ring with an outer ring track surface A on an inner peripheral surface; a bearing with rolling elements between the inner ring track surface A and the outer ring track surface A; a magnetic encoder that is positioned at one axial end portion of the bearing and fixed to the inner ring ; and a magnetic sensor that is fixed to the outer ring , a cup-shaped protective cover press-fitted into the outer ring to cover the magnetic encoder and intervene between the magnetic encoder and the magnetic sensor is formed by performing cold press molding of an austenitic stainless steel plate material with a nickel content of 8.5 to 13 weight %. 1. An apparatus , comprising:a bearing having at least an inner ring, an outer ring, and a rolling element, the inner ring having an inner ring track surface on an outer peripheral surface the outer ring having an outer ring track surface on an inner peripheral surface, and the rolling element being between the inner ring track surface and the outer ring track surface;a support member having a cylindrical part and an annular part;a magnetic encoder that is positioned at one axial end portion of the bearing, fixed to the inner ring, and has N and S poles alternately arranged at regular intervals in the circumferential direction, the magnetic encoder being fixed to the annular part of the support member, the cylindrical part of the support member being fixed to the inner ring;a magnetic sensor that is fixed to the outer ring so as to be opposed to the magnetic poles of the magnetic encoder to detect the rotation of the magnetic encoder; anda cup-shaped protective cover being press-fitted into the outer ring to cover the magnetic encoder and intervene between the magnetic encoder and the magnetic sensor,wherein the protective cover is formed by performing cold press molding of an ...

Scale and optical encoder

A scale and an optical encoder capable of maintaining an accuracy of a reference position irrespective of an error in attaching a detection head are provided. The scale according to the present invention is a scale including main-signal scale gratings having grating patterns of a predetermined pitch, and a reference-signal pattern, in which the main-signal scale gratings are arranged in parallel in a direction perpendicular to a length measurement axis of the main-signal scale gratings and are different from each other in phase by ½, and the reference-signal pattern is formed on the length measurement axis of the main-signal scale gratings. The optical encoder according to the present invention includes a light source, main-signal light source gratings, reference-signal light source gratings, main-signal receiver gratings, and a reference-signal receiver element.

SENSING CHIP STRUCTURE OF OPTICAL SCALE READER

A sensing chip structure of an optical scale reader includes a substrate having at least one conductive pad. The substrate has thereon a photosensitive chip. The photosensitive chip has at least one pin. The pins are each connected to a conductive pad by a conducting wire. A coded graphic layer is disposed on a side of the photosensitive chip, and the side of the photosensitive chip faces away from the substrate. The sensing chip structure is conducive to structural simplification and miniaturization of the optical scale reader. 1. A sensing chip structure of an optical scale reader , comprising:a substrate provided with at least one conductive pad;a photosensitive chip disposed on the substrate and having at least one pin, each pin respectively connected to one conductive pad by a conducting wire; anda coded graphic layer disposed on a side of the photosensitive chip, wherein the side of the photosensitive chip faces away from the substrate.2. The sensing chip structure of an optical scale reader according to claim 1 , wherein the coded graphic layer has a grating pattern.3. The sensing chip structure of an optical scale reader according to claim 1 , wherein an insulating layer which is light-penetrable and covers the coded graphic layer is disposed on the photosensitive chip.4. The sensing chip structure of an optical scale reader according to claim 3 , wherein the insulating layer has thereon a transparent protective layer.5. The sensing chip structure of an optical scale reader according to claim 4 , wherein the protective layer is made of polyimide epoxy resin.6. The sensing chip structure of an optical scale reader according to claim 4 , wherein the protective layer covers the at least one pin claim 4 , and each pin has an extending portion protruding from the protective layer claim 4 , with the conducting wire connecting the extending portions and the conductive pads claim 4 , respectively. The present disclosure relates to optical scales and, more ...

ENCODER DEVICE AND MOTION-GUIDING DEVICE PROVIDED WITH ENCODER DEVICE

Provided is an encoder device capable of reducing interference between a magnetic field generated in a reference mark and a magnetic field generated in a scale. An encoder device is provided with a reference mark and a head. The reference mark has: a first scale coil; and a second scale coil electrically connected to the first scale coil. The head has: a transmission coil that transmits an electromagnetic wave without any contact to the first scale coil; a reception coil that receives an electromagnetic wave without any contact from the second scale coil; and electric circuits that generate a pulse for generating an origin signal from the electromagnetic wave received by the reception coil, if the transmission coil faces the first scale coil and the reception coil faces the second scale coil. 1. An encoder apparatus comprising: a reference mark; and a head , whereinthe reference mark includes a first scale coil, and a second scale coil electrically connected to the first scale coil, andthe head includes a transmitting coil configured to transmit an electromagnetic wave to the first scale coil in a non-contact manner, a receiving coil configured to receive the electromagnetic wave from the second scale coil in a non-contact manner, and an electric circuit configured to generate a pulse for generating an origin signal from the electromagnetic wave received by the receiving coil upon the transmitting coil facing the first scale coil and the receiving coil facing the second scale coil.2. The encoder apparatus according to claim 1 , comprising an incremental magnetic scale claim 1 , wherein the head includes a magnetic sensor configured to read a magnetic field of the incremental magnetic scale.3. The encoder apparatus according to claim 2 , wherein the reference mark and the incremental magnetic scale are stacked.4. The encoder apparatus according to claim 2 , wherein the magnetic sensor is placed between the transmitting coil and the receiving coil.5. The encoder ...

MAGNETIC ENCODER AND PRODUCTION METHOD THEREFOR

A magnetic encoder having a plurality of rows of magnetic tracks and capable of detecting an absolute angle is easily producible with higher accuracy. The magnetic encoder includes: a core member of annular shape having a bending plate portion that bends and extends from an edge of a track formation surface; and two or more rows of magnetic tracks arranged adjacent to each other on a magnetic member provided on the track formation surface, each track having N poles and S poles alternately magnetized thereon. The magnetic tracks include a main track that has a largest number of magnetic poles and is used for calculating an angle, and a sub track used for calculating a phase difference from the main track. The main track is located on a side closer to the bending plate portion than the sub track. 1. A magnetic encoder comprising:a core member of annular shape having a track formation surface and a bending plate portion that bends and extends from an edge of the track formation surface; andtwo or more rows of magnetic tracks arranged adjacent to each other on a magnetic member provided on the track formation surface of the core member, each track having N poles and S poles alternately magnetized thereon, whereinthe two or more rows of magnetic tracks include a main track that has a largest number of magnetic poles and is used for calculating an angle, and a sub track used for calculating a phase difference from the main track, andthe main track is located on a side closer to the bending plate portion than the sub track.2. The magnetic encoder as claimed in claim 1 , whereinthe core member has: a cylindrical portion having an outer peripheral surface that serves as the track formation surface; the bending plate portion that bends from the cylindrical portion toward an inner diameter side; and an attachment portion of cylindrical shape that extends from an inner-diameter-side edge of the bending plate portion to a side opposite to the cylindrical portion, concentrically ...

MAGNETIC ENCODER, AND METHOD AND DEVICE FOR PRODUCING SAME

Provided is a magnetic encoder that can be produced by a simple modification of an existing production method and that can detect an absolute angle with high efficiency, and a method and an apparatus for producing the magnetic encoder. In a magnetic encoder, a plurality of rows of magnetic tracks, each having N poles and S poles arranged alternately, are disposed adjacent to each other. The rows of magnetic tracks include a main track used for calculating an angle and a sub track used for calculating a phase difference from the main track. The number of magnetic poles of the main track is larger than that of the sub track. The main track is magnetized after the sub track. Thus, accuracy of pitch of the magnetic poles is higher in the main track than in the sub track. 1. A magnetic encoder comprising:a plurality of rows of magnetic tracks disposed adjacent to each other, each track having N poles and S poles arranged alternately, the plurality of rows of magnetic tracks including a main track used for calculating an angle and a sub track used for calculating a phase difference from the main track, the number of magnetic poles of the main track being larger than the number of magnetic poles of the sub track, whereinaccuracy of pitch of the magnetic poles is higher in the main track than in the sub track.2. The magnetic encoder as claimed in claim 1 , wherein the number of magnetic poles of the main track is larger by one than the number of magnetic poles of the sub track.3. The magnetic encoder as claimed in claim 1 , wherein the plurality of rows of magnetic tracks are annularly arrayed.4. A method for producing a magnetic encoder comprising a plurality of rows of magnetic tracks disposed adjacent to each other claim 1 , each track having N poles and S poles arranged alternately claim 1 , the plurality of rows of magnetic tracks including a main track used for calculating an angle and a sub track used for calculating a phase difference from the main track claim 1 , ...

CALIBRATOR, ENCODER, DRIVING DEVICE, STAGE DEVICE, ROBOT, ENCODER MANUFACTURING METHOD, AND CALIBRATION PROGRAM

A calibrator includes: a position calculator which calculates a relative position between a first detector and a second detector on the basis of detection signals acquired respectively from the first detector, the second detector, and a third detector positioned with respect to a scale attached to a rotating body; and an error calculator which calculates error information on rotational position information of the rotating body on the basis of the relative position calculated by the position calculator as well as the detection signals. 1. An encoder comprising:a scale attached to a rotation shaft;a first detector which detects the scale and outputs a first detection signal;a memory storage which stores error information calculated using a relative position between a first detector and at least one of two detectors, the two detectors being different from the first detector, calculated on the basis of the first detection signal as well as a second detection signal and a third detection signal which are output by the two detectors upon detecting the scale; anda corrector which corrects rotational position information of the rotation shaft acquired from the first detection signal, using the error information.2. The encoder according to claim 1 , the encoder further comprisinga processor which calculates the rotational position information on the basis of the first detection signal.3. The encoder according to claim 1 , the encoder further comprisinga position calculator which calculates, as the relative position, an angle between the first detector and one of the two detectors about a rotation axis as viewed in a direction of the rotation axis of the rotation shaft.4. The encoder according to claim 3 ,wherein the position calculator calculates the relative position on the basis of a difference between the first detection signal and the second detection signal and a difference between the first detection signal and the third detection signal.5. The encoder according to ...

Magnetic field sensor with improved response immunity

A magnetic field sensor includes a plurality of magnetoresistance elements, each having at least one characteristic selected to provide a respective, different response to an applied magnetic field, wherein each of the plurality of magnetoresistance elements is coupled in parallel. Illustrative characteristics selected to provide the respective responses include dimensions and/or construction parameters such as materials, layer thickness and order, and spatial relationship of the magnetoresistance element to the applied magnetic field. A method includes providing each of a plurality of magnetoresistance elements with at least one characteristic selected to provide a respective, different response to an applied magnetic field, wherein each of the plurality of magnetoresistance elements is coupled in parallel.

Magnetic field sensor with improved response immunity

A magnetic field sensor includes a plurality of magnetoresistance elements, each having at least one characteristic selected to provide a respective, different response to an applied magnetic field, wherein each of the plurality of magnetoresistance elements is coupled in parallel. Illustrative characteristics selected to provide the respective responses include dimensions and/or construction parameters such as materials, layer thickness and order, and spatial relationship of the magnetoresistance element to the applied magnetic field. A method includes providing each of a plurality of magnetoresistance elements with at least one characteristic selected to provide a respective, different response to an applied magnetic field, wherein each of the plurality of magnetoresistance elements is coupled in parallel.

Stray-field-immune coil-activated position sensor

A sensor comprising: a first magnetoresistive (MR) bridge having a first stray field sensitivity; a second MR bridge having a second stray field sensitivity; and a driver circuitry configured to: (i) supply a first voltage to the first MR bridge, and (ii) supply a second voltage to the second MR bridge that is different from the first voltage, wherein supplying the first voltage and the second voltage to the first MR bridge and the second MR bridge, respectively, causes the first stray field sensitivity to match the second stray field sensitivity.

Magnetic field sensor for sensing rotation of an object

A magnetic field sensor uses an angle sensor to measure and angle of rotation of a target object to which a magnet is attached. The angle sensor in combination with electronics can generate an angle sensor output signal related to a direction of a magnetic field of the magnet. The angle sensor output signal can be compared to thresholds to generate a magnetic field sensor output signal the same as a known true power on state (TPOS) sensor output signal. A corresponding method is also described.

Moving body detecting apparatus

A moving body detecting apparatus including at least a gear 1 as a magnetic moving body including at least one of a projected portion or a recessed portion, a bias magnet 5 for applying a bias magnetic field thereto, and two pairs of spin valve type giant magneto resistive elements R 1 , R 2 and R 3 , R 4 , in which the moving body detecting apparatus is arranged such that magnetizing directions of pinned layers of the paired spin valve type giant magneto resistive elements are directed to direct substantially in a forward direction and substantially in an opposite direction relative to the direction of moving the gear 1 , for example, linearly. In a first state in which a change in a magnetic field by the projected portion 2 of the gear 1 is not substantially received, the magnetic field at positions of the elements R 1 through R 4 includes a component forwardly in parallel or in anti-parallel with the magnetizing directions of the pinned layers of the elements R 1 through R 4 , and in a second state of receiving the change in the magnetic field by the projected portion 2 , a direction of a component of the magnetic field at the positions of the elements R 1 through R 4 in parallel with the magnetizing directions of the pinned layers is inversed.

Amr array magnetic design for improved sensor flexibility and improved air gap performance

An AMR array magnetic position sensing system for improved sensor flexibility and improved air gap performance is disclosed. A pair of magnets can be enclosed in a magnet carrier that moves along a path and located above an array of AMR position sensors. The magnets are generally magnetized through the length of the magnets, and the magnets are positioned in the carrier such that an angle between the magnets exists in a manner similar to an angle made by AMR runners on a surface of the AMR positions sensors to create magnetic flux lines thereof. The AMR position sensors come into contact with the uniform magnetic flux lines to sense a change in linear and angular position associated with the magnet carrier. The output signal generated by the AMR position sensors have less susceptibility to variations in air gap as the angles of the magnetic flux lines generated by the magnets do note change with respect to air gap variation.

Magnet-based angular displacement measuring system

The invention relates to a magnet-based angular displacement measuring system (100) for measuring a rotational movement of a driveshaft (4), comprising a driveshaft (4), an exciter unit (5) rotationally coupled to the free end (43) of the driveshaft (4), and a stationary sensor unit (7) which functionally cooperates with the exciter unit (5) for measuring the rotational movement of the driveshaft (4). In order to shield the angular displacement measuring system from magnetic interferences, the driveshaft (4), at the free end (43) thereof, has a coaxial recess (41) such that a hollow shaft section (42) is formed.

磁気的に位置あるいは速度を検出する装置

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

标尺和光学编码器

本发明涉及一种标尺和光学编码器。该标尺和光学编码器能够与安装检测头的误差无关地维持参考位置的精度。根据本发明的标尺包括：具有预定间距的光栅图案的两个主信号标尺光栅；以及参考信号图案，其中，所述两个主信号标尺光栅沿与所述两个主信号标尺光栅的长度测量轴垂直的方向并列配置，并且所述两个主信号标尺光栅彼此偏移1/2相位，以及所述参考信号图案形成在所述主信号标尺光栅的长度测量轴上。根据本发明的光学编码器包括光源、主信号光源光栅、参考信号光源光栅、主信号接收光栅和参考信号接收元件。

Position sensor

Position sensor

位置传感器具备：检测部(119)，具备具有一面(129)的传感器芯片(110)、设于上述传感器芯片的第1检测元件(121，144，150)、及设于上述传感器芯片的第2检测元件(122，145，146)；以及信号处理部(120)，对从上述检测部输入的信号进行处理。上述第1检测元件根据从检测对象(200)受到的磁场的变化，输出与上述检测对象的位置对应的第1检测信号。此外，上述第2检测元件根据从上述检测对象受到的磁场的变化，输出与上述检测对象的位置对应的第2检测信号。并且，上述一面的面内的上述第1检测元件的平衡的中心与上述一面的面内的上述第2检测元件的平衡的中心一致。

Method for processing a material measure

Die Erfindung bezieht sich auf ein Verfahren zum Bearbeiten einer Maßverkörperung (1) eines Positionsmesssystems, die an einer ersten Oberfläche (11) eine Maßverkörperung (3) aufweist und an einer zweiten Oberfläche (12) zur Befestigung an einem Trägerkörper (K) eingerichtet ist und bei der zwischen der ersten und der zweiten Oberfläche (11, 12) ein seitlicher äußerer Rand (15) der Maßverkörperung (1) verläuft und bei der die erste und zweite Oberfläche (11, 12) im Bereich der seitlichen äußeren Randes (15) jeweils durch eine erste bzw. zweite Kante (21, 22) begrenzt sind, wobei beim Bearbeiten der Maßverkörperung (1) zur Bildung einer definierten äußeren Kontur der Maßverkörperung (1) an der ersten Kante (21) und der zweiten Kante (22) der Maßverkörperung (1) jeweils eine Materialaufwölbung (23, 24) gebildet wird, die von der jeweils zugehörigen Oberfläche (11, 12) der Maßverkörperung (1) absteht. Erfindungsgemäß ist vorgesehen, dass die Maßverkörperung (1) an der ersten Kante (21) einerseits und der zweiten Kante (22) andererseits derart unterschiedlich bearbeitet wird, dass die Ausdehnung (h1) der Materialaufwölbung (23) an der ersten Kante (21) senkrecht zu der ersten Oberfläche (11) kleiner ist als die Ausdehnung (h2) der Materialaufwölbung (24) an der zweiten Kante (22) senkrecht zu der zweiten Oberfläche (12). The invention relates to a method for processing a material measure (1) of a position measuring system which has a material measure (3) on a first surface (11) and is arranged on a second surface (12) for attachment to a support body (K) and in which between the first and the second surface (11, 12) a lateral outer edge (15) of the material measure (1) extends and in which the first and second surfaces (11, 12) in the region of the lateral outer edge (15) respectively by a first or second edge (21, 22) are limited, wherein when editing the material measure (1) to form a defined outer contour of the material measure (1) on the first edge (21) and the ...

Magnetic detector

Magnetic detector

Device and method for optically compensating for the measuring track decentralization in rotation angle sensors

The present invention relates to an optical rotation sensor or a rotary encoder comprising an improved encoder disk or an improved encoder disk for an optical rotation angle sensor or rotary encoder and to an angle measurement error of the rotary encoder, And more particularly to a method for optically correcting or correcting an error of an angle measurement subject to eccentricity. The encoder disc 20 of the present invention includes at least one measurement track 22 and at least one correction track 24 wherein the measurement track 22 is located at a first radial (Radius) region; And the correction track 24 is centered in the second radial region of the encoder disc 20 relative to the measurement track 22 so that the center of the measurement track 22 is located at the center of the correction track 24 Coincides with the center. The correction track 24 is preferably such that at least a portion of the light incident on an area of the correction track 24 passes through the common center of the correction track 24 and the measurement track 22 by the correction track 24 And is configured to refract radially in the direction of the axis. Preferably, the direction of the emitted light refracted by the correction track intersects the axis passing through the common center of the correction track and the measurement track, and the distance between the correction track and the intersection point is determined by the light . &Lt; / RTI &gt; The outgoing light may be coherent or non-coherent. The radius of the correction track may be equal to or less than or greater than the radius of the measurement track. The correction track 24 preferably has a diffractive structure.

Rotation angle sensor

本发明涉及一种旋转角度传感器(10)，包括具有定子发射线圈(20)和相对彼此有角度偏移的、相同构造的至少两个定子接收线圈(22a、22b、22c)的定子元件(12)，所述定子接收线圈布置在一个定子电路板(18)上并且布置在所述定子发射线圈(20)内部；相对于所述定子元件(12)围绕旋转轴线(R)能旋转地受支承的转子元件(14)，所述定子发射线圈(20)通过该转子元件与所述至少两个定子接收线圈(22a、22b、22c)感应地耦合，使得该感应耦合与所述定子元件(12)和所述转子元件(14)之间的旋转角度有关，并且所述定子发射线圈(20)在所述至少两个定子接收线圈(22)中感应出至少两个与角度有关的交变电压；其中，所述定子发射线圈(20)具有在所述定子电路板(18)的第一平面和第二平面中的线圈印制导线(50)，其中，在所述定子电路板(18)的第一平面中的所述线圈印制导线(50)在通道区域(58)中断开并且通过敷镀通孔(60)与在所述第二平面上的转接导线(62)连接；其中，在所述第一平面中，所述定子接收线圈(22a、22b、22c)的接头导线(64a、64b)从在所述定子发射线圈(20)内部的定子接收线圈接头(68)通过所述通道区域(58)引导至用于所述定子接收线圈(22a、22b、22c)的电路板接头(70)；其中，定子接收线圈(22a)的接头导线(64a)朝着导体线环(66)弯曲，以便平衡所述定子接收线圈(22a、22b、22c)的由于在所述定子发射线圈(20)内部的不同长度的接头导线(64a、64b)而产生的不同大小的线圈面积。

Magnetic field detector

本公开涉及磁场检测器。本装置和方法使用磁阻元件提供象限、角度或距离的感测。象限或角度传感器可以具有分离成多个角度的磁阻元件，以产生具有减少谐波的输出。距离传感器可以具有分开和间隔开的磁阻元件，以产生具有减少谐波的输出。偏置导体可以交替地携带用于DC偏移补偿或消除的不同的电流量(在大小或方向中的至少一个上不同)。

Surveyor equipped with magnetic encoder and magnetic encoder

Magnetic position detector

System for determining at least one rotation parameter of a rotating member

本公开涉及用于确定旋转构件的至少一个旋转参数的系统。本发明涉及一种系统，该系统包括：编码器，该编码器具有被沿着螺距为p、角度为α的螺旋线延伸的过渡区(3)间隔开的交替的北磁极(2n)和南磁极(2s)，所述磁道具有N pp 对北极(2n)和南极(2s)，并且具有沿着过渡区(3)的法线(N)测得的磁极宽度L p ，其使得：N pp ＝πa/l并且L p ＝p*cosα；以及传感器，该传感器能够借助于至少两个灵敏磁性元件(4 1 、4 2 ；5 1 、5 2 )检测由所述编码器发射的周期磁场，所述至少两个灵敏磁性元件部署在距磁道(2)径向读取距离处，所述灵敏元件相对于彼此部署成递送正交信号。

Rotation detecting device and hollow actuator

Scale and optical encoder

本发明涉及一种标尺和光学编码器。该标尺和光学编码器能够与安装检测头的误差无关地维持参考位置的精度。根据本发明的标尺包括：具有预定间距的光栅图案的两个主信号标尺光栅；以及参考信号图案，其中，所述两个主信号标尺光栅沿与所述两个主信号标尺光栅的长度测量轴垂直的方向并列配置，并且所述两个主信号标尺光栅彼此偏移1/2相位，以及所述参考信号图案形成在所述主信号标尺光栅的长度测量轴上。根据本发明的光学编码器包括光源、主信号光源光栅、参考信号光源光栅、主信号接收光栅和参考信号接收元件。

SEALING, SEALING APPARATUS AND SEALING METHOD

Eine Abdeckung (12) mit einem Behälterabschnitt (14), dessen eines Ende offen ist und dessen anderes Ende durch eine Bodenfläche (38) verschlossen wird, umfasst eine Ringnut (22), die ringförmig entlang eines Außenumfangs einer Öffnung des Behälterabschnitts (14) ausgebildet ist, mehrere Verbindungsabschnitte (28) die in einer Seitenwand (26), welche die Ringnut (22) von dem Behälterabschnitt (14) abtrennt, ausgebildet sind, um die Ringnut (22) in einer radialen Richtung mit dem Behälterabschnitt (14) zu verbinden, und ein ringförmiges Dichtelement (24), das in die Ringnut (22) eingesetzt ist. A cover (12) having a container portion (14) having one end open and the other end closed by a bottom surface (38) includes an annular groove (22) formed annularly along an outer periphery of an opening of the container portion (14) is a plurality of connecting portions (28) formed in a side wall (26) which separates the annular groove (22) from the container portion (14), to connect the annular groove (22) in a radial direction with the container portion (14) , and an annular sealing member (24) inserted in the annular groove (22).

Method and apparatus for correcting the position of a magnet relative to a GMR sensor

本发明涉及一种用于校正磁体相对于GMR传感器的位置的方法，其中，借助第二评估电路（21）由通过固定在电动机（14）的转子（17）上的磁体（18）产生的可变磁场得出转子的位置。在可以实现GMR传感器（20）的高精度信号输出的方法中，由通过磁体展开的磁场的磁总矢量的方向和/或转动推导出GMR传感器（20）的最佳工作区域，这通过借助第二磁场传感器在通过磁总矢量展开的平面中测量磁场强度实现。

GMR sensor within molded magnetic material employing non-magnetic spacer

本发明涉及一种使用非磁性隔离物的模制磁性材料中的GMR传感器，具体而言本发明涉及一种集成电路，包括：引线框架；和芯片，该芯片具有顶表面、底表面和多个周长边，并包括靠近顶表面设置的至少一个磁场传感器元件，其中底表面与引线框架键合。模制磁性材料封装芯片和引线框架的至少一部分，并提供基本上垂直于芯片的顶表面的磁场。非磁性材料至少沿着芯片的周长边设置在芯片和模制磁性材料之间，其中芯片的周长边与平行于芯片的顶表面的水平磁场分量相交。

Length measuring system with modular scale

Magnetic detector

본 발명은 자전 변환 소자를 자성 이동체의 회전 방향으로, 자석의 중심선에 대해 소정의 피치로 대칭적으로 배치된 적어도 6개의 세그먼트로 구성하고, 이 중 상기 자석의 중심선에 대해, 상기 자성 이동체의 회전에 수반하는 출력을 발생하는 제 1 및 제 2의 브리지 회로를 구성함과 함께, 상기 자성 이동체의 회전에 수반하는 출력을 발생하는 제 3의 브리지 회로를 구성한 자기 검출 장치에 있어서, 상기 제 1 및 제 2 브리지 회로 차동 출력 신호를 파형 정형하는 비교 회로의 비교 레벨을, 상기 제 3 브리지 회로 출력 신호에 의해 조정하는 것을 특징으로 하는 것이다. The present invention comprises a magnetoelectric conversion element comprising at least six segments symmetrically arranged in a rotational direction of a magnetic moving object at a predetermined pitch with respect to a center line of a magnet, among which a rotation of the magnetic moving body is performed with respect to the center line of the magnet. In the magnetic detection device comprising the first and second bridge circuits for generating an output accompanying the same, and the third bridge circuit for generating an output accompanying rotation of the magnetic moving object. The comparison level of the comparison circuit for waveform shaping the second bridge circuit differential output signal is adjusted by the third bridge circuit output signal. 자성 이동체, 신호 처리 회로부, 자성 이동체, 회전축 Magnetic moving body, signal processing circuit part, magnetic moving body, rotating shaft

GMR sensor within molded magnetic material employing non-magnetic spacer

本发明涉及一种使用非磁性隔离物的模制磁性材料中的GMR传感器，具体而言本发明涉及一种集成电路，包括：引线框架；和芯片，该芯片具有顶表面、底表面和多个周长边，并包括靠近顶表面设置的至少一个磁场传感器元件，其中底表面与引线框架键合。模制磁性材料封装芯片和引线框架的至少一部分，并提供基本上垂直于芯片的顶表面的磁场。非磁性材料至少沿着芯片的周长边设置在芯片和模制磁性材料之间，其中芯片的周长边与平行于芯片的顶表面的水平磁场分量相交。

Control shaft positioning testing device for workpiece tool, has measuring sensor which is arranged at measuring arm, where sensor is formed as gear wheel, and measuring unit detects relative movement of measuring arm and carrier

The device has a measuring arm (37), which is rotatably supported at a carrier (29), and a measuring sensor (41). The measuring sensor is arranged at the arm, where the sensor is formed as a gear wheel. A measuring unit (47) detects the relative movement of the measuring arm and the carrier. A stopper limits the rotary motion of the measuring arm in one direction. A spring presses the measuring arm in the direction of the stopper.

Position encoder device

Device for recording the speed of rotation of a wheel with an increased intrinsic safety

본 발명은 자기 인코더 (5, 25) 및 센서 (26) 으로 구성되는, 보디의 증가된본질 안전 선형 및/또는 회전 운동을 갖는 기록용 디바이스에 관한 것이며, 여기서 상기 자기 인코더 (5, 25) 는 상기 보디와 함께 변위가능하고 자기 에어 갭에 의해 센서 (26) 의 적어도 두 개의 센서 요소 (S1, S2) 에 자기적으로 커플링되고, 센서 (26) 는 적어도 하나의 신호 컨디셔닝 스테이지 (28, 29) 를 각각 포함하는 적어도 두 개의 구별된 신호 경로들 (S1, f1; S2, f2) 을 포함하고, 적어도 하나의 우선 측정 신호 경로 (S1, f1) 는 그것의 출력 신호가 인코더 운동의 단순 주파수를 정상운전시 복구하도록 생성되고, 적어도 하나의 모니터링 신호 경로 (S2, f2) 는 그것의 출력 신호가 인코더 운동 주파수의 두배를 복구하도록 생성된다. 자기 인코더, 센서, 자기 에어 갭, 신호 컨디셔닝 스테이지, 신호 경로 The present invention relates to a recording device comprising a magnetic encoder (5, 25) and a sensor (26) with increased intrinsic safety linear and / or rotational motion of the body, wherein said magnetic encoder (5, 25) (26) magnetically coupled to at least two sensor elements (S1, S2) of the sensor (26) by means of a magnetic air gap displaceable with the body, the sensor (26) comprising at least one signal conditioning stage (S1, f1), wherein the output signal of the at least one priority measurement signal path (S1, f1) comprises a simple frequency of the encoder motion And at least one monitoring signal path (S2, f2) is generated such that its output signal restores twice the encoder motor frequency. Magnetic encoder, sensor, magnetic air gap, signal conditioning stage, signal path

Magnetic position detector

磁気式位置検出装置（１０）は、磁石（４）と、基板（３）に沿った仮想平面上に形成された第１〜第４の磁電変換素子（１Ａ〜１Ｄ）と、磁性体からなる磁束ガイド（５）とを備える。磁束ガイド（５）は、仮想平面と平行なＸ軸方向に間隔をあけて設けられた第１および第２の突出部（９Ｂ，９Ａ）を含む。仮想平面に垂直なＺ軸方向から見て、第１および第２の突出部間の中央付近の磁束ガイド（５）には、凹状に窪んだ中央部（ＭＰ）が設けられる。第１および第４の磁電変換素子（１Ａ，１Ｄ）は、Ｚ軸方向から見て、第１および第２の突出部間のほぼ中央に、中央部（ＭＰ）の一部を覆うように設けられる。第２の磁電変換素子（１Ｂ）は、Ｚ軸方向から見て、第１の突出部（９Ｂ）と中央部（ＭＰ）との間に設けられる。第２の磁電変換素子（１Ｂ）は、Ｚ軸方向から見て、第２の突出部（９Ａ）と中央部（ＭＰ）との間に設けられる。

Encoder

一种编码器，其包括光接收部和计算部。该光接收部接收来自刻度尺的反射光并且输出基波的各相位相差了2π/N的N相正弦波信号，其中N是大于或等于5的整数。该计算部根据各N相正弦波信号来输出包括A相和B相的两相正弦波信号。该A相由各N相正弦波与包括N的项相乘的总和的实部来表示。该B相由各N相正弦波与包括N的项相乘的总和的虚部来表示。

Optical encoder

Magnet sensor arrangement

建议了一种磁传感器装置(1)，其中布置有对磁场敏感的传感器元件(7，8)，这些传感器元件(7，8)的电特性可以根据磁场来改变，该磁场可以通过运动的无源发送器元件(11)来影响。该磁传感器装置(1)具有在梯度计装置中的两个传感器元件(7，8)，这些传感器元件(7，8)分别被分配给被实施为开口磁体(2；20；23)的永磁体的、两个以预先给定的间隔(sa)布置的磁区(4，5)之一。区域(4，5)和开口磁体(2；20；23)在例如锲形的成型、尺寸(h，b，t)、开口宽度(sa)以及开口深度(st)及其相对于传感器元件(7，8)的位置方面如此被布置，使得在梯度计装置中传感器元件(7，8)的输出信号的偏差被最小化。

Magnetic detector

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Angle sensor

La présente invention a pour objet un capteur d’angle (3) destiné à détecter la position angulaire d’un élément mobile en rotation dans un moteur de véhicule automobile. Le capteur d’angle (3) comporte au moins une sonde magnétique (4) apte à détecter les orientations d’un champ magnétique généré par un aimant (1) fixé sur l’élément mobile. L’aimant (1) présente une face radiale externe (5), une face supérieure (6) et une face inférieure. Selon l’invention, le capteur d’angle (3) comprend une enveloppe magnétique (2) entourant la face radiale externe (5) de l’aimant (1), l’enveloppe magnétique (2) étant composée d’un matériau magnétique. Figure pour l’abrégé : Fig. 1.

System for determining at least one rotation parameter of a rotating member

L’invention concerne un système comprenant un codeur présentant une alternance de pôles magnétiques Nord (2n) et Sud (2s) séparés par des transitions (3) s’étendant suivant une hélice de pas p et d’angle α, ladite piste présentant Npp paires de pôles Nord (2n) et Sud (2s) et une largeur polaire Lp mesurée le long d’une normale aux transitions (3) qui sont tels que : Npp = πa/l et Lp = p.cosα ; et au moins un capteur apte à détecter le champ magnétique périodique émis par ledit codeur au moyen d’un montage (4, 4’) d’au moins deux éléments sensibles magnétiques (5), ledit montage étant disposé à distance de lecture radiale de la piste magnétique (2) et étant agencé pour délivrer des signaux en quadrature. Figure 6 The invention relates to a system comprising an encoder having an alternation of North (2n) and South (2s) magnetic poles separated by transitions (3) extending along a helix of pitch p and angle α, said track having Npp pairs of North (2n) and South (2s) poles and a polar width Lp measured along a normal to transitions (3) which are such that: Npp = πa / l and Lp = p.cosα; and at least one sensor capable of detecting the periodic magnetic field emitted by said encoder by means of an assembly (4, 4 ') of at least two magnetic sensitive elements (5), said assembly being arranged at a radial reading distance of the magnetic track (2) and being arranged to deliver quadrature signals. Figure 6

PHONIC WHEEL, METHOD OF MANUFACTURE AND ROTARY DEVICE EQUIPPED WITH SUCH A WHEEL

L'invention concerne une roue phonique pour dispositif de chaîne de transmission de véhicule comportant une couronne annulaire qui s'étend axialement, la couronne annulaire comportant des doigts qui s'étendent parallèlement à l'axe (X) de ladite roue, lesdits doigts comportant au moins une encoche.

Multipolar magnetic ring shaped encoder for e.g. position sensor, has complementary, short and stabilizing poles with magnetization stabilizing zero resetting of magnetic field, where angular widths of stabilizing and short poles are same

The encoder (2) has north and south poles (N, S) with opposed sign polarities on the circumference of the encoder, and a junction provided between short and long poles (P, G) with opposed sign polarities, where an angular width of the pole (G) is higher than an angular width of the pole (P). The pole (G) has a same signed short stabilizing pole (Ps) placed near the pole (P) whose angular width is identical to the pole (Ps). A same signed complementary pole (Pc) and the poles (P, Ps) have a radial magnetization that stabilizes the resetting of magnetic field to zero gauss, by the pole (Pc).

POSITION SENSOR WITH IRREGULAR POLE STATURE

Selon l'invention, le capteur de position, est caractérisé en ce que les moyens de correction (3) sont réalisés par au moins un pôle magnétique saturé, dit de stabilisation (Ps), possédant un signe contraire au signe du pôle irrégulier (Pi) qui est également saturé, chaque pôle de stabilisation (Ps) s'étendant d'un bord à l'autre de l'anneau magnétique, en étant intercalé dans le pôle irrégulier, de manière à stabiliser le signal magnétique délivré par le passage des pôles adjacents au pôle irrégulier. According to the invention, the position sensor is characterized in that the correction means (3) are made by at least one saturated magnetic pole, called stabilization pole (Ps), having a sign opposite to the sign of the irregular pole (Pi ) which is also saturated, each stabilization pole (Ps) extending from one edge to the other of the magnetic ring, being interposed in the irregular pole, so as to stabilize the magnetic signal delivered by the passage of poles adjacent to the irregular pole.

MAGNETIC COMPONENT FOR A HALL EFFECT SENSOR, ELECTRICAL ASSEMBLY AND ELECTRICAL POWER COMPRESSOR COMPRISING SUCH A MAGNETIC COMPONENT

Magnetic sensor with bifilar windings

Herein provided are sensing systems, methods, sensors, and methods of manufacturing a sensor for a rotating element in an engine. A magnetic core having first and second ends is positioned with the first end proximate the rotating element. A permanent magnet is positioned proximate the second end of the magnetic core and is configured for subjecting the magnetic core and the rotating element to a magnetic field. A bifilar winding comprising a first wire and a second wire electrically insulated from one another is wrapped around at least a portion of the magnetic core, the bifilar winding configured to generate a first signal in the first wire and a second signal in the second wire in response to rotation of the rotating element relative to the sensor.

Angle sensor

La présente invention a pour objet un capteur d’angle (3) destiné à détecter la position angulaire d’un élément mobile en rotation dans un moteur de véhicule automobile. Le capteur d’angle (3) comporte au moins une sonde magnétique (4) apte à détecter les orientations d’un champ magnétique généré par un aimant (1) fixé sur l’élément mobile. L’aimant (1) présente une face radiale externe (5), une face supérieure (6) et une face inférieure. Selon l’invention, le capteur d’angle (3) comprend une enveloppe magnétique (2) entourant la face radiale externe (5) de l’aimant (1), l’enveloppe magnétique (2) étant composée d’un matériau magnétique. Figure pour l’abrégé : Fig. 1. The present invention relates to an angle sensor (3) intended to detect the angular position of a mobile element in rotation in a motor vehicle engine. The angle sensor (3) comprises at least one magnetic probe (4) capable of detecting the orientations of a magnetic field generated by a magnet (1) fixed on the mobile element. The magnet (1) has an external radial face (5), an upper face (6) and a lower face. According to the invention, the angle sensor (3) comprises a magnetic envelope (2) surrounding the external radial face (5) of the magnet (1), the magnetic envelope (2) being made of a magnetic material. . Figure for the abstract: Fig. 1.

Detection device and manufacturing method thereof

SYSTEM FOR DETERMINING AT LEAST ONE ROTATION PARAMETER OF A ROTATING MEMBER

L'invention concerne un système comprenant: un codeur (1) dont la piste magnétique (2) présente une alternance de pôles magnétiques Nord et Sud séparés par i transitions (3) en spirale d'Archimède ; un capteur de rotation apte à détecter le champ magnétique périodique émis par ledit codeur au moyen de plusieurs éléments sensibles (4a, 4b) répartis angulairement le long de la piste magnétique (2) pour délivrer chacun un signal représentatif de la rotation du codeur (1), ledit capteur comprenant en outre un dispositif de soustraction des signaux (V1, V2) délivrés par deux éléments sensibles (4a, 4b) formant entre eux un angle y qui est tel que : 0,55π < γ.Npp < 0,83π, modulo 2π ou 1,1 7π < γ.Npp < 1,45π, modulo 2π. The invention relates to a system comprising: an encoder (1), the magnetic track (2) of which alternates north and south magnetic poles separated by i transitions (3) in Archimedes spiral; a rotation sensor capable of detecting the periodic magnetic field emitted by said encoder by means of several sensitive elements (4a, 4b) distributed angularly along the magnetic track (2) to each deliver a signal representative of the rotation of the encoder (1 ), said sensor further comprising a device for subtracting the signals (V1, V2) delivered by two sensitive elements (4a, 4b) forming between them an angle y which is such that: 0.55π <γ.Npp <0.83π , modulo 2π or 1,1 7π <γ.Npp <1,45π, modulo 2π.

PHONIC WHEEL, METHOD OF MANUFACTURE AND ROTARY DEVICE EQUIPPED WITH SUCH A WHEEL

L'invention concerne une roue phonique pour dispositif de chaîne de transmission de véhicule comportant une couronne annulaire qui s'étend axialement, la couronne annulaire comporte des doigts qui s'étendent parallèlement à l'axe de ladite roue, lesdits doigts comportant au moins un relief (1). The invention relates to a voice wheel for a vehicle transmission chain device comprising an annular ring which extends axially, the annular ring comprises fingers which extend parallel to the axis of said wheel, said fingers comprising at least one relief (1).

System for determining at least one parameter of the rotation of a rotating member

L’invention concerne un système comprenant un codeur présentant une alternance de pôles magnétiques Nord (2n) et Sud (2s) séparés par des transitions (3) s’étendant suivant une hélice de pas p et d’angle α, ladite piste présentant Npp paires de pôles Nord (2n) et Sud (2s) et une largeur polaire Lp mesurée le long d’une normale aux transitions (3) qui sont tels que : Npp = πa/l et Lp = p.cosα ; et au moins un capteur apte à détecter le champ magnétique périodique émis par ledit codeur au moyen d’un montage (4, 4’) d’au moins deux éléments sensibles magnétiques (5), ledit montage étant disposé à distance de lecture radiale de la piste magnétique (2) et étant agencé pour délivrer des signaux en quadrature. Figure 6 The invention relates to a system comprising an encoder having an alternation of North (2n) and South (2s) magnetic poles separated by transitions (3) extending along a helix of pitch p and angle α, said track having Npp pairs of North (2n) and South (2s) poles and a polar width Lp measured along a normal to transitions (3) which are such that: Npp = πa / l and Lp = p.cosα; and at least one sensor capable of detecting the periodic magnetic field emitted by said encoder by means of an assembly (4, 4 ') of at least two magnetic sensitive elements (5), said assembly being disposed at a radial reading distance of the magnetic track (2) and being arranged to deliver quadrature signals. Figure 6

DEVICE FOR DETECTION OF THE ANGULAR POSITION OF A ROTOR OF A ROTATING ELECTRIC MACHINE

L'invention concerne un dispositif de détection (500) de la position angulaire d'un rotor (1) d'une machine électrique tournante (600), le dispositif de détection (500) comprenant au moins : - un capteur de position angulaire (3), - une cible magnétique (4) mobile en rotation autour d'un axe de révolution (400), caractérisé en ce que le dispositif de détection (500) comprend au moins une paroi métallique (5, 5a, 5b, 5c) disposée entre la cible magnétique (4) et le capteur de position angulaire (3). The invention relates to a device (500) for detecting the angular position of a rotor (1) of a rotary electrical machine (600), the detection device (500) comprising at least: - an angular position sensor ( 3), - a magnetic target (4) movable in rotation about an axis of revolution (400), characterized in that the detection device (500) comprises at least one metal wall (5, 5a, 5b, 5c) disposed between the magnetic target (4) and the angular position sensor (3).

POSITION SENSOR WITH IRREGULAR POLE STATURE

Optical position measuring device

本发明涉及一种光学位置测量装置。该光学位置测量装置一方面包括整体量具，其沿着测量方向延伸并且具有增量分度以及绝对编码。另一方面设有扫描单元，其相对于整体量具沿着测量方向可相对移动地设置并且具有光源、用于光学扫描增量分度的扫描网格以及检测器装置。检测器装置包括用于从增量分度的光学扫描中产生增量信号的增量检测器以及用于从绝对编码的光学扫描中产生绝对信号的绝对检测器；增量检测器和绝对检测器设置在共同的检测平面中。检测平面具有距扫描网格的限定的标准间距和/或将增量检测器上的条形图案的周期性选择成，使得在整体量具和/或扫描网格的区域中进行散射的污染物中增量信号和绝对信号的幅度均匀地衰减。

System and method of magnetically sensing position of a moving component

A position-sensing system magnetically senses the position of a piston rod moving with respect to a cylinder. A magnetically hard layer on the piston rod provides a recording medium. Information is magnetically recorded in regions of the magnetically hard layer. These regions provide a relative encoding scheme for determining the position of the piston rod. Magnetic-field sensors are positioned over redundant tracks of magnetically recorded regions. Each magnetic-field sensor positioned over a given track senses the same magnetized regions while the piston rod moves with respect to the cylinder. Other magnetic-field sensors can sense ambient fields for use in performing common-mode rejection. A write head can dynamically repair damaged or erased regions detected by the magnetic-field sensors. Energized by a battery-backup power source, the magnetic-field sensors and associated circuitry can continue to track piston rod movement when the machinery is off.

Signal transmitter with improved detection of the angle signal

Ein Signalgeber (2) weist ein Drehelement (9) auf, das um eine Rotationsachse (7) drehbar ist. Der Signalgeber (2) weist weiterhin eine Anzahl von Sensoren (10) auf, die jeweils ein Sinussignal (y) und ein Cosinussignal (x) ausgeben. Das Sinussignal (y) und das Cosinussignal (x) des jeweiligen Sensors (10) sind, bezogen auf eine jeweilige Referenzrichtung (11), charakteristisch für den Sinus und den Cosinus der Drehstellung (α) des Drehelements (9). Die Referenzrichtungen (11) sind orthogonal zur Rotationsachse (7) orientiert. Der Signalgeber (2) weist eine Recheneinheit (14) auf, der die Sinussignale (y) und die Cosinussignale (x) zugeführt werden. Die Recheneinheit (14) ermittelt durch arithmetische Verknüpfung der Sinussignale (y) und der Cosinussignale (x) der Sensoren (10) ein resultierendes Sinussignal (yR) und ein resultierendes Cosinussignal (xR). Die Recheneinheit (14) stellt das resultierende Sinussignal (yR) und das resultierende Cosinussignal (xR) zur weitergehenden Verarbeitung bereit. Alternativ oder zusätzlich ermittelt die Recheneinheit (14) durch trigonometrische Auswertung des resultierenden Sinussignals (yR) und des resultierenden Cosinussignals (xR) ein resultierendes Winkelsignal (αR) und stellt das resultierende Winkelsignal (αR) zur weitergehenden Verarbeitung bereit.