Device to detect failure of digital acceleration meter

The appliance (20) an A/D converter (26) connected to an analogue acceleration meter (24) which provides a signal to trigger a gate (40) and a number of pulse signals when the gate signal is in a first state. The value of the analogue acceleration signal is indicated by the pulse density. Provision is made to detect when at least one of the number of pulse signals does not occur when the gate trigger signal is in the first state, namely to provide a signal indicating the acceleration. The gate triggering signal can be a pulse width modulated signal with the pulse width related to the value of the analogue acceleration signal ...

Ausgleichseinrichtung fuer Steigungsfehler einer Vorschubspindel in zahlenwertgesteuerten Werkzeugmaschinen

Verfahren zur Bestimmung zumindest eines ersten internen Parameters eines Sensors

Verfahren zur Bestimmung zumindest eines internen Parameters eines aktiven Sensors (1) in einem Sonderbetriebsmodus, wobei der Sensor (1) mindestens ein Sensorelement (2), eine Auswerteschaltung (3), wenigstens zwei Anschlussleitungen (4, 5), insbesondere mit jeweils einem Anschluss (41, 51) und ein Umschaltmodul (6) aufweist, wobei der Sensor (1) mittels des Umschaltmoduls (6) zwischen einem Normalbetriebsmodus und dem Sonderbetriebsmodus umgeschaltet wird und zur Bestimmung des zumindest einen internen Parameters in den Sonderbetriebsmodus versetzt wird, wobei der Sensor (1) eine elektrische Offsetquelle (7) aufweist, mit welcher im Sonderbetriebsmodus in Abhängigkeit der an den zwei Anschlussleitungen (4, 5) anliegenden Versorgungsspannung (U-Sup) des Sensors die Auswerteschaltung (3) zumindest teilweise so angesteuert wird, dass der zm Sensorausgangssignal (Out) ermittelt werden kann.

Proximity detector with exciter for vibrating system - has decoder system responding to amplitudes of oscillation

The exciter device (1, 2, 3; 14) acts on the vibrating system (4, 5; 15) influenced by the object at exciting intervals whose periods are greater than the duration of the dying-out process, given by a lower limiting amplitude value, of the system vibrating solely under the influence of inherent damping. A counting device (6, 9, 10; 17 to 26) detects the number of periods of oscillation of the dying-out process damped by the object within each exciting interval and becomes effective between two given limiting amplitude values. The vibrating system can be an electrical LC resonant circuit.

Interpolation method for interpolating analog signals for measuring paths or angles

The method provides interpolation of at least two analog signals obtained by sampling a division carrier. The analog signals are sinusoidal, position dependent, periodic signals shifted by 90 deg. relative to each other. Noise is superimposed on each analog signal by means of sigma-delta modulation. Signal trains are generated from the resulting trains by a simultaneous low pass filtering of the noise component above the max. input frequency of the analog signals. A stream of angle values is obtained from the signal trains. After a second low pass filtering of the noise component above the max. frequency of the input analog signals, a stream of output values are allocated to the angle values. The method may be carried out by a high resolution, digital interpolation device. This has two sigma-delta modulators (4). A conversion device (6) for converting the angle values is connected to each modulator (4) via a digital low pass filter (5) to convert the signal trains. The conversion device ...

Pulsbreitenmodulation mit zwei oder mehr unterschiedlichen Schwellpegeln

Ein Magnetsensor kann mit einem Magnetrad in Verbindung stehende Informationen bestimmen, die mit einer Drehgeschwindigkeit des Magnetrades oder einer Drehrichtung des Magnetrades in Verbindung stehen. Der Magnetsensor kann mit dem Magnetsensor in Verbindung stehende Informationen bestimmen, die mit einer Eigenschaft des Magnetsensors in Verbindung stehen. Der Magnetsensor kann ein Signal bereitstellen, das die Informationen, die mit dem Magnetrad in Verbindung stehen, und die Informationen umfasst, die mit dem Magnetsensor in Verbindung stehen. Das Signal kann unter Verwendung einer Pulsbreitenmodulationstechnik bereitgestellt werden, die mit zumindest drei Signalpegeln und zumindest zwei Signalschwellen in Verbindung steht. Ein Zeitraum, in dem die Informationen bereitgestellt werden, die mit dem Magnetsensor in Verbindung stehen, kann zumindest teilweise einen Zeitraum überlappen, in dem die Informationen bereitgestellt werden, die mit dem Magnetrad in Verbindung stehen, oder kann ohne ...

Material measure for use in i.e. angle measuring system, has carrier body provided for structure, where structure and carrier body are formed by common component such as injection molding part or plastic part

The measure (1') has a structure (2) detected by a sensor and comprising a geometrically changing pattern. A carrier body (3') is provided for the structure. The structure and the carrier body are formed by a common component such as injection molding part or plastic part. The component is formed by a material containing magnetizable substance such as powder with strontium hexaferrite, neodymium-iron-boron substance or barium hexaferrite. The detected structure is magnetized. The structure consists of two rings (7', 8'). Independent claims are also included for the following: (1) an injection molding tool for producing a material measure (2) an absolute value encoder comprising a sensor device.

IMPROVEMENTS IN OR RELATING TO MECHANO-ELECTRICAL TRANSDUCTION SYSTEMS

... 1,255,631. Measuring electrically. SHIHYING LEE and YAO TZU LI. Nov. 8, 1968 [Nov.8, 1967], No.50988/68. Headings G1N and G1U. A transducer system includes sensing networks 11, 13 including impedance elements, e.g. capacitors C 1 , C 2 or resistors R 1 , R 2 , variable in response to pressure, acceleration or temperature, a D.C. source having high and low voltage output levels E h , E 1 , switches 3, 4, connected to input terminals of the sensing networks whereby the output voltages e 01 , e 02 of the networks are caused to vary in alternation between the voltages E h , E 1 at a rate dependent on the parameter to be measured, a switch 5 controlling the switching of the input terminals of the two networks when a respective output voltage reaches a reference level E r , whereby the mean voltage difference e OUT between the input voltages to the sensing networks is proportional to the parameter to be measured. An alternative embodiment, Fig. 5 (not shown) utilizes a multi-vibrator as the switching ...

An electronic multi-shaft absolute position detecting device

An electronic multi-shaft absolute position detecting device, 1 comprising an absolute position recording circuit 11, an interface circuit 12, a spare power circuit 13, and a cooperating application software circuit, detects incremental position signals produced by a measuring system 3 associated with a numerically controlled machine tool and converts the signals into absolute position signals to thereby record machine-part position values. In case of a power cut, the spare power circuit 13 can provide the absolute position recording circuit 11 and interface circuit 12 with power so that the absolute position recording circuit 11 can continuously detect the position signals produced by the measuring system 3 and record the position values thereof. After the power supply is restored, the absolute position recording circuit 11 can respond to the requirement of a numerical control system 2 to read the final position values of the machine when the power is restored and transmit the final position ...

High resolution sensor with scalable sample rate

Apparatus and methods of providing a selected sample rate for sensor measurements are provided, which in one aspect may include a circuit configured to receive sensor signals as a first series of count rates corresponding to sensor the sensor measurements, each count rate representing a value of a parameter of interest, at least two accumulators configured to alternately accumulate the count rates in the series of count rates over a time period that corresponds to a selected sample rate and a controller configured to control the time periods for the at least two accumulators.

TURNING POSITION COLLECTION SIGNAL GENERATOR

DREHSTELLUNGS-ERFASSUNGSSIGNAL-GENERATOR

PROCEDURE AND DEVICE FOR PARAMETRIERUNG THE MEASURING INSTRUMENT

TURNING POSITION COLLECTION SIGNAL GENERATOR

SENSORANORDNUNG SOWIE MESSEINRICHTUNG UNTER VERWENDUNG EINER SENSORANORDNUNG

Bei einer Sensoranordnung zur exakten Lokalisierung eines an der Sensoranordnung (5) vorbeibewegten Meßobjektes (3) unter Verwendung wenigstens eines Differentialsensors wird das zu erfassende Meßobjekt (3) an der Sensoranordnung (5) vorbeibewegt und von den beiden in einem definierten Abstand von einander angeordneten Aufnehmern (7, 7) in zeitlicher Abfolge erfaßt und vom Differentialsensor ein wegabhängiges Meßsignal ausgegeben. Dabei sind zwei gleichartige Differentialsensoren (13, 14) vorgesehen, wobei ein Aufnehmer (7 bzw. 7) des einen Differentialsensors (13 bzw. 14) zwischen den zwei Aufnehmern (7 bzw. 7) des anderen Differentialsensors (14 bzw. 13) angeordnet ist.

ANGLE MEASURING DEVICE

Abnormality determining system for detection device, detection device, abnormality determining device for detection device, and abnormality determining method for detection device

An abnormality determining system (1) is provided with: a detection device (300) that detects rotations of rotating shafts (48) of a robot (30); and an abnormality determining device (50) that detects an encoder abnormality on the basis of absolute signals and incremental signals transmitted from the detection device (300). The abnormality determining device (50) calculates the absolute angles of the rotating shafts (48) on the basis of changes of the rotating angles of the rotating shafts (48), said changes being indicated by the incremental signals transmitted from an incremental encoder (200). In the cases where a difference between each of the absolute angles of the rotating shafts (48), said absolute angles having been calculated on the basis of the incremental signals, and each of the absolute angles of the rotating shafts (48), said absolute angles being indicated by the absolute signals transmitted from the absolute encoder (100), is outside of an allowable range, the abnormality ...

SYSTEM FOR DETECTING MECHANICAL MOVEMENT

MEASURING AND DISPLAY SYSTEM

POSITION DETECTING SIGNAL GENERATOR

Einrichtung zur Fernmessung von Betriebsgrössen oder der Summe mehrerer gleichartiger Betriebsgrössen nach dem Impulsverfahren.

Einrichtung zum Bestimmen der Lage zweier relativ zueinander beweglicher Teile

Anordnung zur Bestimmung der Lage von Marken beispielsweise bei Massstäben

Appareil d'affichage pour la mesure d'une valeur angulaire

Digitale Anzeigevorrichtung für einen Lage-Messapparat an einer Werkzeugmaschine

Trigonometrischer Signalgenerator

ELECTRONIC UP/DOWN COUNTER.

SIGNAL GENERATOR FOR THE STATEMENT OF THE WINKELLAGE OF AN ANCHOR.

WAY COLLECTION ARRANGEMENT OF A MEHRACHSIGEN MEASURING SYSTEM.

Position measurement encoder calibration

Rotation angle detection device

The present invention relates to a rotation angle calculation unit including a first rotation angle calculation portion, a second rotation angle calculation portion, a third rotation angle calculation portion, an abnormality monitoring portion, and a final rotation angle calculation portion. The abnormality monitoring portion determines, based on a first output signal, a second output signal, and a third output signal, whether the first to third output signals are each normal or abnormal. The final rotation angle calculation portion calculates a final rotation angle based on the final determination result obtained by the abnormality monitoring portion and the first to third rotation angles calculated by the first to third rotation angle calculation portions, respectively.

Encoder

An encoder is configured for detection of rotational movement of a rotatable shaft (20) in relation to a part of a machine, and a method is provided for generating a reference signal by an encoder.

MOTOR DRIVE CONTROL DEVICE, ELECTRIC POWER STEERING DEVICE, AND VEHICLE

Vehicle seat position sensing

Encoder

ELEMENT MAGNET SENSORS FOR A ROTATING MACHINE

GENERATOR OF SIGNAL OF DETECTION OF POSITION

Apparatus for measuring angles

Electrical gear motor`s operating characteristic e.g. speed, determining method for window regulator of motor vehicle, has sensor generating preset signal in response to detection of magnetic field that depends on rotation of shaft

L'invention se rapporte à un dispositif comprenant : - un moteur alimenté par un courant d'alimentation, - un arbre moteur entraîné en rotation par le moteur, - un premier champ magnétique (B1) dépendant de la rotation de l'arbre, - un capteur (16) adapté à générer un signal prédéterminé en réponse à la détection du premier champ magnétique, et - un deuxième champ magnétique (B2) dépendant du courant d'alimentation du moteur, le deuxième champ magnétique modifiant le signal généré par le capteur. L'invention permet de connaître le sens de rotation du moteur et de détecter de couple de fonctionnement du moteur, et ce de manière moins onéreuse.

Difference measurement of two variable inductive impedances

Un circuit électronique à grandeur de sortie numérique permettant d'effectuer une mesure différentielle de deux impédances inductives variables.L'invention concerne un circuit qui permet de convertir la différence de deux grandeurs inductives de deux bobines distinctes en un signal numérique fonction de cette différence. Le circuit comporte une partie analogique fonctionnant en oscillateur et une partie numérique construite autour d'un compteur asynchrone. Le circuit permet, entre autres, de faire des mesures numériques différentielles de proximité d'objets métalliques placés entre deux bobines ...

CONTROL DEVICE Of a GEAR BOX OF MOTOR VEHICLE SUBJUGATED HAS a CALCULATOR

Le dispositif comprend un organe de passage et de sélection de différents modes, à savoir en mode automatique, les positions P - R - N - D et, en mode manuel, les positions M+ et M-, au moyen d'un organe de passage et de sélection des différents modes. L'organe est un bouton (1) apte à être entraîné librement en rotation, d'une manière continue, ledit bouton étant assujetti, d'une part, à des moyens (3) et (4) aptes à lui assurer une position stable correspondant à l'un des modes P - R - N - D ou M avec, pour chacun d'eux, un signal d'indication lumineuse et, d'autre part, à des moyens (6) de détection de déplacement et du sens de rotation ...

DEVICE FOR the MEASUREMENT OF INTERNAL SIZE Of a TUBE, IN PARTICULAR IN a WELL AND PROCESS OF APPLICABLE MEASUREMENT OF DISPLACEMENT HAS SUCH a DEVICE

HYDRAULIC EXCAVATOR AND METHOD FOR MEASURING STROKE OF HYDRAULIC CYLINDER OF HYDRAULIC EXCAVATOR

... 유압 셔블(1)은 기초부와, 가동부와, 유압 실린더와, 위치 센서(10)와, 로터리 인코더(20)와, 제어부(30)를 구비하고 있다. 로터리 인코더(20)는 발광부(26)와, 수광부(27)와, 복수의 투과부(25a)가 배치되고 그리고 기초부에 대한 가동부의 회동에 동기하여 회동하는 원반부(25)를 갖고 있다. 가동부의 회동 각도에 원반부(25)의 회동 각도가 대응시켜진 펄스 신호를 복수의 투과부(25a)를 투과한 발광에 기초하여 수광부(27)가 출력한다. 제어부(30)는 로터리 인코더(20)로부터 출력된 펄스 신호에 기초하여 위치 센서(10)에서 측정된 스트로크 길이의 어긋남을 보정하여 유압 실린더의 스트로크 길이를 계측한다. 이에 따라, 작업기를 구동하는 유압 실린더의 스트로크 길이를 정확히 계측할 수 있는 유압 셔블 및 유압 셔블의 유압 실린더의 스트로크 계측 방법을 얻을 수 있다.

NARROW PATH PASSING TYPE AREA FLOW METER

The present invention relates to a narrow path passing type area flow meter which accurately measures a flow by measuring a height of a float in a magnetostrictive system after allowing a fluid to pass a narrow path. According to the present invention, the narrow path passing type area flow meter comprises: a float which has a rectangular shape with long sides and short sides, has an inlet on one short side and an outlet on an other short side, has an inflowing space with a first width, a measuring space with a second width and an outflowing space with a third width which are sequentially disposed between the inlet and the outlet, and has the second width which is narrower than the first width and the third width; a float mounted with a permanent magnet, disposed in a measuring space of the body, and having a height which is variable in accordance with the flow; a probe bar mounted with a magnetostrictive wire, detecting a position of a float when a pulse wave is applied through the magnetostrictive ...

OPTICAL ENCODER

Resolver signal processing apparatus Drive apparatus, resolver signal processing method, and program

Linear encoder, and method of detecting a reference position

METHOD AND DEVICE FOR DETERMINING A ROTOR ANGLE OF A ROTATING SHAFT

The invention relates to a method and a device for determining a rotor angle (φrotor) of a rotating shaft by means of a resolver. A phase shift between the excitation alternating voltages (UE1, UE2) is periodically switched between 90° and 270° to compensate for propagation delays.

METHOD FOR OPERATING A POSITIONAL MEASUREMENT DEVICE AND CORRESPONDING POSITIONAL MEASUREMENT DEVICE

The invention relates to a method for operating a positional measurement device, in addition to a corresponding positional measurement device. Said device comprises a signal generation unit for generating positional data and is connected to follower electronics by means of a communication unit. Data is transmitted between the signal generation unit and the communication unit via an internal interface unit, whereas measurement-data request instructions, which are transmitted by the follower electronics to the positional measurement device, are transmitted to the signal generation unit by bypassing the internal interface unit.

GEAR PACKAGING FOR ROBOT ARMS

A robot arm comprising a joint mechanism for articulating one limb (310) of the arm relative to another limb (311) of the arm about two non-parallel rotation axes (20, 21), the mechanism comprising: an intermediate carrier (28) attached to a first one of the limbs by a first revolute joint having a first rotation axis and to a second one of the limbs by a second revolute joint having a second rotation axis; a first drive gear (33) disposed about the first rotation axis and fast with the carrier, whereby rotation of the carrier relative to the first limb about the first rotation axis can be driven; a second drive gear (37) disposed about the second rotation axis and fast with the second one of the limbs, whereby rotation of the second one of the limbs about the second rotation axis relative to the carrier can be driven; at least one of the first and second drive gears being a sector gear.

Two scanning probes information recording/reproducing system with one probe to detect atomic reference location on a recording medium

An encoder includes an electrically conductive reference scale having surface steps formed at predetermined positions; an electrically conductive probe having a tip disposed opposed to the reference scale; wherein the reference scale and the probe are relatively movable in a direction different from the opposing direction of the tip of the probe and the reference scale; a portion for applying an electrical voltage to between the reference scale and the probe; a portion for detecting a change in a tunnel current between the reference scale and the probe, to between which the electric voltage is applied by the voltage applying portion at the time of the relative movement between the scale and the probe, the detecting portion detecting the change in the tunnel current when the probe passes a position opposed to a surface step of the reference scale; and portion for detecting the amount of the relative movement between the scale and probe, on the basis of the detection by the change detecting ...

Method for determining the position of the rotor of an electric machine, and a position sensor

A method for determining the position of the rotor (5) of an electric machine in the radial direction (X, Y) and in the axial direction (Z) applies a cogged ring (2), through which the shaft (5a) of the rotor (5) is placed. The shaft (5a) is provided with an auxiliary ring (6) placed substantially at the cogged ring (2). The cogged ring is provided with at least three sets of cogs, wherein the cogs of the first set (3a1, 3a2 . . . , 3a8) are used to measure the movement of the shaft (5a) in the radial direction (X, Y), the cogs of the second (3b1, 3b2, 3b3, 3b4) and third (3c1, 3c2, 3c3, 3c4) sets are used to measure the movement of the shaft (5a) in the axial direction (Z), and that the cogs of the second (3b1, 3b2, 3b3, 3b4) and third (3c1, 3c2, 3c3, 3c4) sets are placed, in the axial direction (Z), at least partly in a different location in relation to each other.

Position detecting device

A magnetism detecting element detects a leakage magnetism from a scale, on which a magnetic signal with a constant period is recorded, and a relative position between the scale and the magnetism detecting element is detected. The magnetism detecting elements are arranged, along a detection direction of the magnetic signal relative to the scale, in a pattern with a pitch of 1/2n (n is a prime number of 3 or more) of a wavelength λ′ of a signal output by the element. Furthermore, as the pattern for cancelling m odd-order harmonics, the m-th power of 2 magnetism detecting elements are arranged within a range in which a pitch distance L of the magnetism detecting element farthest in the detection direction is expressed by L=(λ′/2)×(1/3+1/5+1/7+ . . . 1/(2m+1)).

CORRECTION VALUE DERIVATION APPARATUS, DISPLACEMENT AMOUNT DERIVATION APPARATUS, CONTROL APPARATUS, AND CORRECTION VALUE DERIVATION METHOD

This invention improves detection precision by reducing a detection error of a change in position of a target. A correction value derivation apparatus for deriving a correction value used in correction of a displacement amount derived based on an encoder signal indicating a change in position of a movable portion as a target, comprises: a displacement amount derivation unit configured to derive a detected displacement amount of the movable portion based on the encoder signal; a displacement velocity derivation unit configured to derive a detected displacement velocity based on the detected displacement amount derived by the displacement amount derivation unit; an average displacement velocity calculation unit configured to calculate an average displacement velocity over a predetermined displacement range; and a correction value derivation unit configured to derive the correction value based on the detected displacement velocity and the average displacement velocity.

Method of processing sensor signals for determining motion of a motor shaft

Methods and systems of processing sensor signals to determine motion of a motor shaft are disclosed. This disclosure relates to the processing of sequences of pulses from a sensor for computing the motion of an electric motor output shaft. Furthermore, this disclosure relates to the processing of two sequences of pulses from sensor outputs, which may be separated by only a few electrical degrees, to compute the motion of an electrical motor output shaft while using a limited bandwidth controller. Motor shaft direction, displacement, speed, phase, and phase offset may be determined from processing the sensor signals.

Rotary table machine for container treatment with rotary transducer

Disclosed is a rotary table machine for container treatment, comprising a carousel with container receptacles for conveying containers, wherein the container receptacles are arranged at a regular spacing along a circular path about an axis of rotation of the carousel by means of a machine pitch, characterized in that the carousel and a rotary transducer are connected via a transmission such that, when the carousel rotates about a machine pitch, the rotary transducer emits and/or processes a whole-number multiple of a periodic value increment as a position signal, a signal transmitter is designed to detect a reference mark on the carousel and for emitting a reference mark signal on the basis thereof, and a signal processing device is designed to process the position signal and the reference mark signal in order to regulate the position of the carousel and to control the container receptacles.

Method for centering a signal within the dynamic range of a peak detecting proximity detector

PULSE SHAPER FOR INDUCTION TRANSMITTERS

A pulse shaper for inductive transmitters, in particular camshaft angle transmitters on internal combustion machines, in wich a Schmitt-trigger is connected to the output of the transmitter. A peak value detector (D1, C) is connected to the output of the transmitter and means (R3, R4) are linked therewith in order to set a threshold value for the Schmitt trigger depending on the output of the peak value detector.

Electronic circuit for determining angle position of e.g. rotor, of motor vehicle electrical machine, has power supply device, output stage and output device commonly arranged on substrate, where sensor device is formed as resolver

The electronic circuit (1) has a output stage (4), which activates a sensor device (7), and an output device (5) outputting information about an angle position of a rotating part. A power supply device (3), the output stage and the output device are commonly arranged on a substrate (2). The sensor device is formed as a resolver. The resolver outputs a cosine signal and a sine signal depending on the angle position, where amplitudes of the signals are dependent on the angle position, where the output device is formed as an analog to digital converter.

Aufbewahrungsspule mit einem Magnetmaßstabband

Aufbewahrungsspule mit einem Wickelkern (4) und einem ein ferromagnetisches Material aufweisenden Magnetmaßstabband (2), das mit einer Polteilung (12) mit voherrbestimmten Pollängen (6) magnetisiert ist, sowie einem Zwischenlagenband (3), das mindestens die Breite und die Länge des Magnetmaßstabbands (2) hat und an das das Magnetmaßstabband (2) flächig angelegt ist, wobei das Magnetmaßstabband (2) zusammen mit dem Zwischenlagenband (3) auf den Wickelkern (4) in mehreren Windungen spiralartig aufgewickelt ist, so dass in Radialrichtung des Wickelkerns (4) Windung für Windung das Magnetmaßstabband (2) und das Zwischenlagenband (3) sich abwechseln, wobei das Zwischenlagenband (3) aus einem paramagnetischen Material ist und eine Dicke (5) hat, die gleich oder größer einer Minimaldicke ist, die derart bestimmt ist, dass die einzelnen Windungen des Magnetmaßstabbands (2) von dem Zwischenlagenband (3) derart voneinander magnetisch entkoppelt sind, dass im Abwickelzustand die Pollängen (12) des ...

Method to correct periodical signals of incremental positioning measurement system; involves comparing correct value of signal parameter with reference value and determining adjustment value

The method involves transmitting the correct value of a signal parameter of the signal, and comparing it with one or more given threshold or reference values. An adjustment value to adjust the signal parameters towards the true value is determined, according to the relative position of the correct value of the signal parameter to the reference values for at least two different adjustment values. The adjustment values are acted on the signal parameter through an adjustment part (6.1,6.2), to control the signal parameter in the direction of the adjustment value. An independent claim is included for a circuit arrangement for implementing the method.

Aufbewahrungsspule mit einem Magnetmaßstabband und Verfahren zum Aufbewahren des Magnetmaßstabbands

Eine Aufbewahrungsspule weist einen Wickelkern (4) und einen ein ferromagnetisches Material aufweisenden Magnetmaßstabband (2), das mit einer Polteilung (12) mit voherrbestimmten Pollängen (6) magnetisiert ist, sowie einen Zwischenlagenband (3) auf, das mindestens die Breite und die Länge des Magnetmaßstabbands (2) hat und an das das Magnetmaßstabband (2) flächig angelegt ist, wobei das Magnetmaßstabband (2) zusammen mit dem Zwischenlagenband (3) auf den Wickelkern (4) in mehreren Windungen spiralartig aufgewickelt ist, so dass in Radialrichtung des Wickelkerns (4) Windung für Windung das Magnetmaßstabband (2) und das Zwischenlagenband (3) sich abwechseln, wobei das Zwischenlagenband (3) aus einem paramagnetischen Material ist und eine Dicke (5) hat, die gleich oder größer einer Minimaldicke ist, die derart bestimmt ist, dass die einzelnen Windungen des Magnetmaßstabbands (2) von dem Zwischenlagenband (3) derart voneinander magnetisch entkoppelt sind, dass im Abwickelzustand die Pollängen ...

Vorrichtung, insbesondere zur galvanotechnischen Behandlung und/oder zur Spülbehandlung von Gegenständen

SCHALTUNG FÜR DIGITALE IMPULSE.

VERFAHREN ZUM BETRIEB EINER POSITIONSMESSEINRICHTUNG UND GEEIGNETE POSITIONSMESSEINRICHTUNG HIERZU

Method to determine angular pitch of a toothed crank wheel or gear

UTILITY METERS

Method to determine angular pitch of a toothed crank wheel or gear

Wheel speed sensing system

ELECTRIC SYSTEM

... 1,272,423. D/A converter. INDUCTOSYN Ltd. 1 May, 1969 [14 May, 1968; 24 March, 1969], No. 58273/69. Divided out of 1,272,422. Heading G4H. By continually cycling two counters each having a capacity M by clock pulses of frequency Mf and appropriately combining their various outputs, two pulse trains S and C each of frequency f are produced, the durations of the pulses in the two pulse trains being such that the first harmonics contained within each pulse train are proportional to the sine and cosine respectively of the constant count difference between the two counters. As described each counter has a capacity of M = 20, the count difference is d which can have any even value from 0 to 20, and the durations of the pulses in the two pulse trains S and C, and their first harmonics are as follows: where 2#w = f. This result is achieved by two counters 11, 12, Fig. 1, driven by interleaved clock pulses of frequency Mf from NAND gates 390 and 3901 respectively, gates 394 and 395 which ...

MOTION SENSOR

PROCEDURE FOR THE ENTERPRISE OF POSITION MEASURING INSTRUMENT AND APTITUDE POSITION MEASURING INSTRUMENT FOR THIS

POSITIONING

EINRICHTUNG ZUR BERUEHRUNGSLOSEN ERZEUGUNG VON ELEKTRISCHEN IMPULSEN

MAGNETIC SENSOR

ELECTRONIC COORDINATE POSITION DIGITIZING SYSTEM

METHOD FOR DETERMINING THE POSITION OF THE ROTOR OF AN ELECTRIC MACHINE, AND A POSITION SENSOR

CONTACTLESS MAGNETIC LINEAR POSITION SENSOR

In a position sensor, two field sensors are placed along a line parallel to the movement to be detected. Two magnets are placed at an angle to each other to generate a magnetic field such that their position is a linear or approximately linear function of the difference between the outputs of the sensors.

Encoder and encoder control system

Magnetic air type position detection device and magnetic air type position detection method

ELECTRONIC METER

MAGNET SENSOR ELEMENT FOR A ROTARY MACHINE

Elément de capteur (10) comprenant un élément de tête (11) avec un élément de capteur (14) et un élément de fixation (12) pour sa fixation axiale solidaire en rotation à un élément rotatif (20) de machine. L'élément de tête (11) et l'élément de fixation (12) sont réalisés en une seule pièce.

회전체 감지를 위한 통합 센서

... 본 발명은 회전체 감지를 위한 통합 센서 및 이의 진단 방법에 관한 것이다. 이를 위한, 위한 본 발명의 하나의 센서로 차량의 부품에 적용되는 2-와이어 센서와 3-와이어 센서의 기능들을 통합하여 수행하기 위한 통합 센서는 입력 터미널, 출력 터미널 및 그라운드 터미널을 포함하는 터미널부; 입력 터미널을 통해 전원을 공급받고, 홀 효과에 의해 발생한 자속 밀도 변화에 의한 홀 전압을 검출하는 홀 소자; 및 홀 소자를 통해 출력되는 홀 전압을 근거로 출력 터미널에 연결된 트랜지스터에 대한 제어 신호를 생성하는 비교기를 포함하고, 입력 터미널은 통합 센서에 기설정된 전류를 인가하는 정전류원의 일측에 연결되고, 그라운드 터미널은 상기 정전류원의 타측에 연결되는 것을 특징으로 한다.

sensor de alta resolução com taxa de amostragem escalável

Sheet substrate conveying device

A cylindrical-member-position detection device is provided with: a second drum member (22); a plurality of scale increments (GP) that are disposed annularly along the direction of the rotation of the second drum member (22), rotate around a second central axis (AX2) together with the second drum member (22), and are for measuring positional variation of the second drum member (22) in the circumferential direction; an encoder head (EN4), which is for reading the scale increments (GP); and an encoder head (EN5), which is disposed in a different position than encoder head (EN4) and is for reading the scale increments (GP). Further, the cylindrical-member-position detection device corrects error in the scale increments (GP) on the basis of the value read by encoder head (EN4) and the value read by encoder head (EN5).

Voltage supply device

SENSOR UNIT AND BEARING ASSEMBLY COMPRISING SUCH A SENSOR UNIT

This sensor unit (4) for sensing the angular position of a rotating element (20) with respect to a fixed element (22), comprises a target (42) fast with the rotating element (20) and a given number of sensing cells (401). Each sensing cell (401) is connected to a connection device (403) adapted to provide power supply, transmit data delivered by the sensing cells (401) and connect each sensing cell (401) to the ground. The sensor unit (4) comprises an output connector (44) for electrically connecting the sensor unit (4) to a reception device, a power supply system and the ground, via a connection cable (50) comprising at least two connection wires (501, 502, 503, 504). The connector (44) comprises, for each wire (501-504) of the connection cable (50), a connection pin (446) having a clamp portion (4460) adapted to receive an end of said wire (501-504), and a plug portion (4464) adapted to make a pressing contact with the connection device (403).

MAGNET ASSEMBLY FOR A TORQUE AND/OR ROTATIONAL ANGLE SENSOR ARRANGEMENT HAVING A MAGNET RING AND PRODUCTION METHOD

The invention relates to a magnet assembly having a magnet ring (1), which is attached to a shaft by means of a support sleeve (2), particularly for a torque and/or rotational angle sensor arrangement. The magnet ring (1) is connected to the support sleeve through at least one intermediate piece (10; 23, 24) in a positive-locking and/or bonded manner so that the magnet ring lies radially above the support sleeve (2), wherein in each case tooth geometries and/or undercut geometries are arranged on the magnet ring (1) in such a way that said geometries are molded as an injection-molded part by way of application of the at least one intermediate piece (10; 23, 24).

POSITION MEASUREMENT USING MAGNETIC FIELDS

Position detection of a linear motor (102) for an active suspension system of a vehicle chassis. Hall sensors (122a-d) extending away from the stator ends (104) detect the end positions from the mover magnets (108). A further Hall sensor device (110a, b) detects the exact field direction of a mover magnet (108) thereby providing an accurate position signal. Alternative position detection: A permanent magnet (232, 290) biased Hall sensor (238) fixed to the stator detects the field variation resulting from a moving, long, wedge-shaped steel blade (231) fixed to the mover.

Trace locator for a multi-trace recorder

A trace locator for identifying in a visual display the position on a recording medium of a recorded trace representing an input signal in a multi-trace recorder. The trace position may be displayed without a movement of the recording medium to enable the possible trace to be located and positioned by observing the visual display. The visual display is sequentially advanced by successive clock signals until a predetermined amplitude of an input signal to be displayed is reached. The trace location is displayed for a preset period of time after which the display is cleared prior to a subsequent display of the trace location for either the same input signal or another input signal.

Circuit for detecting relative angular displacement of a steering wheel

First and second up-down counters are provided to operate in response to the steering movements of a motor vehicle. The first up-down counter operates as an up-counter while the steering wheel is rotated clockwise to increase its count by unit steps and operates as a down-counter while the steering wheel is rotated counterclockwise decreasing the count by unit steps to zero. The second up-down counter operates as an up-counter while the steering wheel is rotated counterclockwise and as a down-counter while the steering wheel is rotated clockwise. The content of each counter represents the relative angular displacement of the steering wheel. When a predetermined count is reached in each of the counters, an output is provided to indicate that the steering wheel has rotated a predetermined relative amount of angular displacement and the counters are cleared for subsequent counting operations.

VEHICLE SEAT POSITION SENSING

A vehicle system includes a base, a seat rotatably disposed on the base, a magnet generating a magnetic field, and a sensor. The sensor is programmed to measure an angular displacement of the seat relative to the base based at least in part on an orientation of the magnetic field generated by the magnet.

GEAR PACKAGING FOR ROBOT ARMS

A robot arm comprising a joint mechanism for articulating one limb (310) of the arm relative to another limb (311) of the arm about two non-parallel rotation axes (20, 21), the mechanism comprising: an intermediate carrier (28) attached to a first one of the limbs by a first revolute joint having a first rotation axis and to a second one of the limbs by a second revolute joint having a second rotation axis; a first drive gear (33) disposed about the first rotation axis and fast with the carrier, whereby rotation of the carrier relative to the first limb about the first rotation axis can be driven; a second drive gear (37) disposed about the second rotation axis and fast with the second one of the limbs, whereby rotation of the second one of the limbs about the second rotation axis relative to the carrier can be driven; at least one of the first and second drive gears being a sector gear.

Apparatus for digitally monitoring an analog parameter of an industrial installation

An operating parameter such as temperature or pressure is digitally quantized into a plurality of constant-duration first pulses of corresponding amplitude. The first pulses are employed, over the duration of the first pulses, to continually charge a capacitor, which in turn is coupled across an oscillatory discharge path including a diac or other threshold-operated, negative resistance electronic element. The diac is triggered on when the voltage across the capacitor exceeds a predetermined value, and is triggered off again when the voltage thereacross during discharge corresponds to a second predetermined diminished value across the capacitor, thereby effecting the capacitor discharge as a series of constant amplitude relatively short duration pulses whose number is proportional to the amplitude of the first pulse. Advantageously, the second pulses are coupled via a pulse transformer to a full-wave rectifier, and are then routed to a suitable processor for further utilization.

METHOD AND DEVICE FOR PROVIDING INFORMATION ON AN ANNULAR DISPLACEMENT OF A DC ELECTROMOTOR

Driving an electromotor and a brushed electromotor in particular results in ripples in the supply current. The amount of pulses is proportional to the amount of revolutions of the rotor of the electromotor. With a flawless motor, the amount of pulses is the same with each revolution. Flaws of the electromotor, in brushes, rotor, windings and/or other components, results in fluctuations of pulses in the supply current per revolution of the rotor. By comparing an expected amount of pulses to counted pulses and using various physical parameters of the electromotor, various methods may be employed to correct a counted amount of pulses or otherwise provide an appropriate value representing displacement of the rotor of the electromotor. The time between counted pulses may also be used for determining slip of a slip coupling comprised by a drive train to which the electromotor may be coupled.

Phase correction circuit of encoder signal

A position detector has a peak detector for detecting peak values of an A1 signal and a B1 signal serving as output signals of an analog to digital (AD) converter, an offset/amplitude correction section for generating an A2 signal and a B2 signal by correcting offsets and amplitude errors using the peak values detected by the peak detector, and a position data conversion section for converting the sinusoidal signals of an A phase and a B phase into position data.

Method and circuit for processing signals for a motion sensor

The present invention relates to a method and a circuit arrangement for processing signals for an active motion sensor which generates at least one first sequence of input pulses that contain motion information. By at least one integrating filter circuit, each input pulse of a pulse train is integrated, and an associated output pulse is generated during a period in which the integrated signal is in excess of a predeterminable second threshold value after a predeterminable first threshold value has been exceeded so that the output pulse has a time delay with respect to the input pulse. As a result, noises of a duration which is shorter than the delay time are effectively suppressed.

Rotation detection sensor

PCT No. PCT/JP96/03511 Sec. 371 Date Aug. 8, 1997 Sec. 102(e) Date Aug. 8, 1997 PCT Filed Nov. 29, 1996 PCT Pub. No. WO97/22008 PCT Pub. Date Jun. 19, 1997A rotation stopped detection sensor detects a rotation stopped condition of a rotatable body using a plurality of optical sensors. The detection sensor also includes a rotation disk having optical guide portions for guiding light beams from light emitting devices to respective light receiving devices, and light shut off portions for shutting off the light beams to the respective light receiving devices. The optical guide portions and the light shut off portions are disposed alternately on an outer peripheral portion of the rotation disk. The plurality of optical sensors are disposed such that when the disk is stopped, one of the optical sensors is always at a position corresponding to an optical guide portion. As a result, when the disk is stopped, there is always one output from the optical sensors which is at a high level. Hence the ...

Power conversion device and motor drive apparatus

Magnetic flux generated when a current flows through a main circuit wiring serves as disturbance of a magnetic sensor, and accurate rotor position information is obtained. A motor drive apparatus controls an operation of a power conversion device outputting a current to an AC motor on the basis of a desired torque command value, and includes a main circuit wiring that is electrically connected to a switching element forming the power conversion device, and through which a DC current or an AC current is transmitted thereto, a magnetic sensor that detects a magnetic flux change of a sensor magnet attached to a rotor of the AC motor, and a controller that calculates a current command value which is output from the power conversion device to the motor on the basis of position information of the rotor detected by the magnetic sensor, in which the controller includes a magnetic flux error correction unit that detects or calculates a magnetic flux component generated by a current flowing through ...

Storage coil with a magnetic measuring tape and method for storing the magnetic measuring tape

Eine Aufbewahrungsspule weist einen Wickelkern (4) und einen ein ferromagnetisches Material aufweisenden Magnetmaßstabband (2), das mit einer Polteilung (12) mit voherrbestimmten Pollängen (6) magnetisiert ist, sowie einen Zwischenlagenband (3) auf, das mindestens die Breite und die Länge des Magnetmaßstabbands (2) hat und an das das Magnetmaßstabband (2) flächig angelegt ist, wobei das Magnetmaßstabband (2) zusammen mit dem Zwischenlagenband (3) auf den Wickelkern (4) in mehreren Windungen spiralartig aufgewickelt ist, so dass in Radialrichtung des Wickelkerns (4) Windung für Windung das Magnetmaßstabband (2) und das Zwischenlagenband (3) sich abwechseln, wobei das Zwischenlagenband (3) aus einem paramagnetischen Material ist und eine Dicke (5) hat, die gleich oder größer einer Minimaldicke ist, die derart bestimmt ist, dass die einzelnen Windungen des Magnetmaßstabbands (2) von dem Zwischenlagenband (3) derart voneinander magnetisch entkoppelt sind, dass im Abwickelzustand die Pollängen ...

Position measuring system and method for assembly

A method for mounting a substrate of a measurement graduation and a scanning head of a position measuring system on a first machine part and a second machine part. The method including fastening a substrate of a measurement graduation and a scanning head on first and second portions, respectively, of a mounting aid. The method including adjusting a location of the first portion relative to the second portion in a first degree of freedom that differs from a measurement direction in which a relative position of the first machine part relative to the second machine part is to be measured. The method including fastening the substrate and the scanning head on the first and second machine parts, respectively, at the mounting position. The method further including removing the mounting aid.

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.

Position encoder apparatus

A position encoder kit, including: a scale comprising a series of position features; and a readhead. The readhead includes a detector for receiving configuration information from a configuration item. The readhead is configured to operate in accordance with the configuration information. The readhead also includes a receiver interface via which the readhead can supply position information to a receiver.

Angle detection apparatus and position detection apparatus

An angle detection apparatus comprising a magnet rotor having a multi-pole segment magnet, and a magnetic sensor for detecting the direction of a magnetic flux generated from the multi-pole segment magnet; the multi-pole segment magnet having pluralities of magnetic poles along the rotation direction of the magnet rotor, the magnetic sensor comprising a magnetosensitive plane having pluralities of spin-valve, giant-magnetoresistive devices each having a pinned layer having a fixed magnetization direction and a free layer having a magnetization direction rotating in response to the magnetic flux direction; and the magnetic sensor being positioned relative to the magnet rotor, such that the magnetosensitive plane crosses the magnetic flux, with perpendicular magnetic flux density components having different amplitudes on the magnetosensitive plane.

Hysteresis-Compensating Interpolation Circuits in Optical Encoders

Disclosed are various embodiments of circuitry and methods to compensate for variations in hysteresis associated with the comparators of an interpolation circuit in a single track optical encoder. Such variations in hysteresis may be minimized or eliminated by providing appropriately configured resistor ladder circuits to condition the inputs to the comparators, or by programming or trimming resistors in positive feedback loops of the comparators. The single track optical encoder configurations disclosed herein permit very high resolution reflective optical encoders in small packages to be provided. Methods of making and using such optical encoders are also disclosed.

Rotation angle calculation apparatus and rotation angle calculation method

A control apparatus using a multipole resolver for calculating the rotation angle of a motor includes an acquisition unit, a learning unit, a calculation unit, and a correction unit. The acquisition unit acquires a detected angle θ detected by the multipole resolver. The learning unit learns the waveform of an error Errθ for each pole of the resolver. The calculation unit calculates a motor's rotational acceleration variation α. The correction unit compares the rotation speed variation α with a threshold value α0. Where α<α0, the correction unit performs a normal correction of calculating a corrected angle φ using an error Errθ of one mechanical period (in which the motor makes one full rotation) ago. In contrast, where α>α0, the correction unit performs a transition correction of calculating a corrected angle φ using an immediately preceding error Errθ.

Angle of rotation detection device

An angle of rotation detection device includes an electrical angle detector (resolver and R/D converter) having the electrical angle of 360° set smaller than the mechanical angle of 360°, and providing a two-phase encoder signal corresponding to the electrical angle of a rotor; a two-phase encoder counter counting a two-phase encoder signal, and providing a digital value corresponding to the electrical angle, and a multiplication factor detector detecting which position of the mechanical angle the electrical angle indicated by the signal output from the detector corresponds to, based on a change of the count value from the two-phase encoder counter. Thus, there can be provided an angle of rotation detection device that can identify the position of the mechanical angle while using the two-phase encoder output.

Angle-Measuring Device

An angle-measuring device includes a first group of components and a second group of components that are rotatable relative to each other about an axis. The first group includes a carrier element for enclosing a shaft and on which a graduation disk is secured, a connecting element, and a device for affixing the connecting element relative to the carrier element. The second group includes a sensor element for scanning the graduation disk. The carrier element and the connecting element are arranged such that the connecting element is able to be brought into operative connection with the carrier element so that torque is transmittable with positive locking between the connecting element and the carrier element about the axis. The connecting element is able to be brought into a positive-locking position by axial displacement by the device for affixing the connecting element, and is able to be prestressed radially against the shaft.

Method for Checking Plausability of Digital Measurement Signals

A method for checking plausibility of digital measurement signals, wherein the method comprises forming a trend function for a prescribed number of successive measurement values of the measurement signal, determining the differential values between the measurement values and the trend function if the leading digit of at least one differential value is equal to zero, multiplying all differential values by a factor so that the leading digits of all differential values are non-zero values, determining a deviation between the frequency distribution of the leading digits of the differential values and the frequency distribution in accordance with Benford's law, and generating a warning message if the deviation exceeds a threshold value.

Angular correction method for rotary encoder

[Object] To provide an angular correction method with which angular skip does not occur in determining an angle between angular graduations of a dial of a rotary encoder by interpolation calculation. [Solution Means] Angular correction data are obtained by a residual curve determining step (S 2 ) of determining a residual r i between a position computed from a model and an actually read position P i , and of fitting the residual r i to a polynomial f(x) which is a function of an angular graduation image number x to determine a residual curve, r=f(x), a slope computing step (S 4 ) of computing a tangential slope f′(x i ) of the residual curve; an angular skip computing step (S 5 ) of computing an angular graduation image position correction quantity C i from a residual r i and the slope f′(x i ), of determining a measured angle value θ 0 by using the correction quantity C i , of switching the combination of angular graduation images to a forward side and a backward side to determine measured angle values θ −1 and θ +1 , and of computing the angular skip quantity; an order determining step (S 7 ) of determining the order of the polynomial f(x) such that the angular skip quantity is minimized; and an angular correction data recording step (S 8 ) of recording the residual and the tangential slope.

Relative angle detection device, rotation angle detection device, relative angle detection method, and rotation angle detection method

Disclosed is a relative angle detection device for detecting a relative angle between a first rotary shaft and a second rotary shaft, the relative angle detection device being provided with a first magnetic field sensing unit which outputs a value according to a magnetic field of a magnet, a second magnetic field sensing unit which outputs a value according to the magnetic field of the magnet and outputs a value different from the output value of the first magnetic field sensing unit even if being placed in the same magnetic field as that of the first magnetic field sensing unit, a correction unit which corrects one output value out of the output value of the first magnetic field sensing unit and the output value of the second magnetic field sensing unit in accordance with an amplitude ratio between magnetic field components orthogonal to each other in the magnetic field of the magnet, and a computing unit which computes the relative angle between the first rotary shaft and the second rotary shaft on the basis of the one output value corrected by the correction unit and the other output value different from the one output value. Consequently, a technique capable of detecting the relative rotation angle with high accuracy is provided even if magnitudes of amplitudes of magnetic field components orthogonal to each other in the magnetically sensitive surface of the magnetic field sensing unit are different from each other.

Optical encoder

An optical encoder includes a light projecting portion, a light receiving portion, and a scale arranged between the light projecting portion and the light receiving portion. The scale includes a light guiding portion which allows light to transmit therethrough and has a light guiding function of guiding at least a part of the light projected by the light projecting portion in a direction vertical to thickness direction thereof through the light guiding portion. The light receiving portion receives the light guided by the scale and relatively moves with respect to the scale.

Technique for compensating for abnormal output of resolver for environmentally friendly vehicle

Disclosed is a technique for compensating for an abnormal output of a resolver. More specifically, a central processing unit (CPU) sets a current motor position angle before compensation θ n,ORG as a current motor position angle θ n and obtains a motor position change Δθ n [rad] between a current sampling [n] and a previous sampling [n−1] and a motor position change Δθ n-1 [rad] between the previous sampling [n−1] and a more previous sampling [n−2]. Subsequently, a variable A is calculated based on the above angles. The CPU determines whether to perform the compensation by comparing the calculated variable A and a calibration variable K and calculates a current motor position angle for compensation θ n [rad]. Finally, the CPU compensates for the absence of motor rotor position information with the calculated current motor position angle for compensation θ n [rad].

Encoder

An encoder ( 10 ) includes a sensor ( 1 ) configured to illuminate light on a single scale ( 100 ) to detect two phase signals having periods different from each other, an error signal generator ( 2 ) configured to arrange accumulated amounts of phase changes of the two phase signals when the scale ( 100 ) and the sensor ( 1 ) are relatively displaced from each other by a predetermined displacement so as to obtain two accumulated phase signals and to obtain a difference between the two accumulated phase signals so as to generate an error signal that is obtained by removing an accumulated phase component corresponding to the predetermined displacement, and an interpolation error detector ( 3 ) configured to average the error signal by using at least one of periods of the two phase signals so as to detect an interpolation error contained in at least one of the two phase signals.

Magnetic multi-turn absolute position detection device

The disclosure relates to a magnetic device for detecting the absolute position of an input shaft capable of rotating more than 360°, the device including a main magnetic sensor, a motion reducer, and a secondary magnetic sensor, wherein the main magnetic sensor is connected to a rotor, measures the rotation of the shaft for ranges of angles of less than 360°, and includes a main magnet, the motion reducer converts the rotation of the shaft into a reduced rotation, the maximum amplitude of which is equal to no more than 360°, and the secondary magnetic sensor measures the reduced rotation and includes a secondary magnet. According to the disclosure, the secondary magnet is arranged between the upper and lower planes of the main rotor, and the main magnet has P pairs of poles, where P is greater than 1.

Method for Supervising the Correct Function of a Periodically Modulated Sensor Controlling the Position of a Rotating System and Controller Device for Performing this Method

A method for supervising the correct function of a periodically modulated sensor controlling the position of a rotating system, includes the steps of a) determining a response {right arrow over (g i )}=(g ci ,g si ) of the periodically modulated sensor, b) determining the inverse K=W −1 of a 2×2 matrix W describing gains and rotations induced by a digital signal processing routine applied to the raw sensor data to extract the position data, c) determining the complex number m=m cos +im sin obtained by processing a raw sensor data value a i corresponding to a first position of the rotating system with the digital signal processing routine, d) calculating an estimate a′ i for the next raw sensor data value a i+1 based on the formula a′ i =g i K{right arrow over (m)}, where m → = ( m cos m sin ) , and e) comparing the estimate and the next raw sensor data and creating an alert if the result of this comparison exceeds a predetermined value.

Method and device for determining the absolute position of a movable body

In a method for determining absolute position of a mobile element in reference to two magneto-sensitive sensors, having a source of a magnetic field fastened to the element, a first sensor signal and a second sensor signal are measured with one magneto-sensitive sensor each. An amplitude ratio of the respective sensor signals and the off-set values about the respective zero point of the sensor signals are determined from the minimum and maximum values of the sensor signals, and from these values, scaled sensor signals are calculated that form a sum signal and a difference signal, which are scaled, with the determination of the minimum and the maximum values occurring by a relative movement of the element over a full range of motion, and an absolute position is calculated via the scaled sum signal and the scaled difference signal.

Engine crank signal correction method and controller

An engine control module and method configured to correct an engine crank sensor signal for errors in an apparent location of a tooth edge on a crank wheel is provided. A correction factor is determined based on a first formula if a comparison of adjacent pulse intervals to predetermined thresholds indicates that a tooth edge appears to be abnormally late, and determined based on a second formula if a comparison of adjacent pulse intervals to other predetermined thresholds indicates that a tooth edge appears to be abnormally The correction factor is set to a null value if the correction factor is not determined based on the first formula or the second formula; and operating an engine based on the correction factor.

Techniques for calibrating a linear position sensor

Techniques are described for sensing a position of an object located within an enclosure over a position range. The techniques include generating an expected output signal of each of a plurality of magnetic field sensors disposed along an outer surface of the enclosure, receiving actual output signals from the sensors, wherein each actual output signal indicates a relative proximity of a magnetic target coupled to the object to the corresponding sensor. The techniques further include superimposing the expected output signal over the actual output signals, and iteratively shifting the expected output signal over position relative to the actual output signals and comparing the shifted expected output signal to the actual output signals, until the expected output signal compared to the actual output signals corresponds to a substantially minimized error parameter. The position of the object may then be determined based at least in part on the shifted expected output signal.

INTELLIGENT WIRE CONNECTORS

An intelligent wire connector carrying a microprocessor for transmitting information and/or sensing conditions proximate the wire connector wherein information from the microprocessor may be transmitted to a remote location in either a wireless mode or indirectly through an electrical wire, which is secured in the wire connector. 19.-. (canceled)10. The method of remotely obtaining dynamic information proximate an electrical wire connector comprising:placing a microprocessor in or on an electrically insulated housing of an electrical wire connector;forming an electrical junction within the electrical wire connector without interfering with the microprocessor;placing the wire connector with the microprocessor in an area where the wire connector may be concealed from view;using the microprocessor to sense conditions proximate the wire connector to obtain dynamic information; andusing the microprocessor to transmit the dynamic information to a remote location.11. The method of wherein the microprocessor is placed in the electrically insulated housing of a twist-on electrical wire connector and a set of electrical wires are twisted into electrical engagement in the twist-on wire connector.12. The method of including incorporating an environmental sensor in the twist-on electrical wire connector.13. The method of including the step of incorporating the environmental sensor in the microprocessor.14. The method of wherein the step of incorporating an environmental sensor includes incorporating one or all of a temperature sensor claim 12 , a pressure sensor or a moisture sensor.15. The method of including monitoring conditions proximate the twist-on electrical wire connector with one or more of a location sensor claim 11 , an environmental sensor or a motion sensor.16. The method of including incorporating a wireless transmitter into the microprocessor to transfer information to a remote location either on demand or in response to a condition proximate the wire connector.17 ...

Encoder

An encoder is configured for detection of rotational movement of a rotatable shaft in relation to a part of a machine, and a method is provided for generating a reference signal by an encoder. 1. An encoder for detection of rotational movement of a rotatable shaft in relation to a part of a machine , comprising:a scale device adapted to attach to a circumference of the shaft, the scale device having a width and a length and including a first magnetic scale pattern having a plurality of magnetic pole elements provided with a first predetermined division in a direction of the length adapted to generate a first magnetic field pattern at a first distance from a surface of the scale device, the scale device including at least one gap between ends of the first magnetic scale pattern; and a housing;', 'a first output terminal adapted to provide an encoder output signal indicative of a relative change in position between the signal generator and the scale device;', 'a second output terminal adapted to provide a reference signal indicative of a rotational position of the shaft;', 'a first magneto-electric transducer head having a first magneto-electric transducer adapted to generate a first electric signal in response to detection of the magnetic field pattern so that the first electric signal varies periodically in dependence on the first magnetic field pattern such that the variation exhibits a first wavelength that depends on the first predetermined division when the first magneto-electric transducer moves along the first magnetic scale pattern;', 'a second magneto-electric transducer head having a second magneto-electric transducer adapted to generate a second electric signal in response to detection of the first magnetic field pattern so that the second electric signal varies periodically in dependence on the first magnetic field pattern such that the variation exhibits the first wavelength dependent on the first predetermined division when the second magneto-electric ...

Steering-shaft-rotation-angle detection device

A steering-shaft-rotation-angle detection device that detects a rotation angle of a steering shaft that is rotated by operation of a steering wheel, includes an electric motor that assists steering of the steering wheel by a driver, a speed reduction mechanism that reduces speed of rotation of the electric motor and transmits the rotation to the steering shaft, a rotating body that is attached to a rotation shaft of the electric motor, a signal output unit that outputs a signal in accordance with rotation of the rotating body, and a controller that calculates a rotation angle of the rotating body on the basis of the output signal from the signal output unit and calculates, on the basis of this rotation angle and a speed reduction ratio of the speed reduction mechanism, a rotation angle of the steering shaft.

Encoder element and method for production thereof

A method for producing an encoder element having a base body and a magnetic plastics element includes providing the base body and mixing a plastics base material with a magnetic or magnetizable filler to form an injection-molding material. The method also includes spraying the injection-molding material onto the base body so that a material-bonding, direct connection is produced between the base body and the sprayed-on plastics element. The method also includes magnetizing the sprayed-on plastics element.

CALIBRATION SYSTEM FOR A PRESSURE-SENSITIVE CATHETER

A calibration apparatus includes a fixture, which is coupled to accept a probe so that a distal tip of the probe presses against a point in the fixture and produces first measurements indicative of a deformation of the distal tip relative to a distal end of the probe, in response to pressure exerted on the distal tip. A sensing device is coupled to the fixture and is configured to produce second measurements of a mechanical force exerted by the distal tip against the point. A calibration processor is configured to receive the first measurements from the probe, to receive the second measurements from the sensing device and to compute, based on the first and second measurements, one or more calibration coefficients for assessing the pressure as a function of the first measurements. 1. A calibration apparatus , comprising:a fixture, which is coupled to accept a probe so that a distal tip of the probe presses against a point in the fixture and produces first measurements indicative of a deformation of the distal tip relative to a distal end of the probe, in response to pressure exerted on the distal tip;a sensing device, which is coupled to the fixture and is configured to produce second measurements of a mechanical force exerted by the distal tip against the point; anda calibration processor, which is configured to receive the first measurements from the probe, to receive the second measurements from the sensing device and to compute, based on the first and second measurements, one or more calibration coefficients for assessing the pressure as a function of the first measurements.2. The apparatus according to claim 1 , wherein the fixture is coupled to cause the probe to press against the point at one or more predefined angles claim 1 , and wherein the calibration processor is configured to compute the calibration coefficients as a function of the predefined angles.3. The apparatus according to claim 2 , and comprising a dome covering the fixture claim 2 , the dome ...

Sensor Array Noise Reduction

Sensor array noise reduction is provided. Techniques involve systems and methods for reducing sensor array noise by estimating an instantaneous frequency of a coherent noise signal in a logging system. The instantaneous frequency may be estimated based on a rotation of an electric motor in the logging system, or may estimated by applying suitable signal processing algorithms on measurements in the logging system. A virtual measurement may be computer using the instantaneous frequency. The virtual measurement may be demodulated to obtain a baseband signal, and noise may be removed from the baseband signal to obtain a denoised signal. 1. A system , comprising:one or more processors; and estimate an instantaneous frequency based on a coherent noise measurement;', 'generate a virtual measurement based on the instantaneous frequency;', 'demodulate the virtual measurement to obtain a baseband signal; and', 'remove noise from the baseband signal to obtain a denoised signal., 'a non-transitory tangible computer-readable memory coupled to the one or more processors and having executable computer code stored thereon, the code comprising a set of instructions that causes one or more processors to perform the following2. The system of claim 1 , wherein the instructions further causes one or more processors to estimate the instantaneous frequency based on a rotational frequency of an electrical motor in the system.3. The system of claim 2 , wherein the instructions causes one or more processors to estimate the instantaneous frequency based on the rotational frequency of the electrical motor by measuring the revolution speed of the electrical motor using one or more encoders claim 2 , proximity sensors claim 2 , or combinations thereof.4. The system of claim 1 , wherein the instructions further causes one or more processors to estimate the instantaneous frequency based on a variation of an electromagnetic field induced by a rotation of an electrical motor in the system.5. The ...

POSITION DETECTION DEVICE AND POSITION DETECTION METHOD

There is provided a position detection device to suppress an influence of a signal distortion due to a processing error, an assembly error of a sensor, or the like. The position detection device includes: a waveform correction unit that corrects waveforms of a first signal and a second signal, the first signal being detected from a first track provided on a moving body and having a scale of predetermined cycles, and the second signal being detected from a second track provided on the moving body and having a scale of cycles less than the predetermined cycles; and a position calculation unit that calculates a position of the moving body on the basis of the corrected first signal and second signal. 1. A position detection device comprising:a waveform correction unit that corrects waveforms of a first signal and a second signal, the first signal being detected from a first track provided on a moving body and having a scale of predetermined cycles, and the second signal being detected from a second track provided on the moving body and having a scale of cycles less than the predetermined cycles; anda position calculation unit that calculates a position of the moving body on a basis of the corrected first signal and second signal.2. The position detection device according to claim 1 , wherein the first signal includes two sinusoidal waves having a phase difference of 90° therebetween claim 1 , and the second signal includes two sinusoidal waves having a phase difference of 90° therebetween.3. The position detection device according to claim 2 , wherein the position calculation unit calculates the position of the moving body from a difference between a first value and a second value claim 2 , the first value being obtained by calculating arctangent2 of the two sinusoidal waves of the first signal claim 2 , and the second value being obtained by calculating arctangent2 of the two sinusoidal waves of the second signal.4. The position detection device according to claim 1 , ...

Angle measuring device and method for operating an angle measuring device

An angle measuring device includes first and second component groups and a bearing. The first component group includes a scale element having a first graduation. The second component group has a first modular unit, including a position sensor, and a second modular unit, including first, second, and third position transducers, and a compensation coupling. The first and second modular units are connected in a torsionally stiff but axially and radially flexible manner. The angle measuring device is operable in first and second modes. In the first mode, the first graduation is scannable by the position sensor to determine a first angular position. In the second mode, the first graduation or a further graduation situated on the scale element is scannable by the position transducers to determine further angular positions. A corrected relative angular position is determinable based on the first angular position and the further angular positions.

CONTAMINATION AND DEFECT RESISTANT OPTICAL ENCODER CONFIGURATION FOR PROVIDING DISPLACEMENT SIGNALS

An optical encoder configuration comprises a scale, an illumination source, and a photodetector configuration. The illumination source is configured to output structured illumination to the scale. The scale extends along a measuring axis direction and is configured to output scale light that forms a detector fringe pattern comprising periodic high and low intensity bands that extend over a relatively longer dimension along the measuring axis direction and are relatively narrow and periodic along a detected fringe motion direction transverse to the measuring axis direction. The high and low intensity bands move along the detected fringe motion direction transverse to the measuring axis direction as the scale grating displaces along the measuring axis direction. The photodetector configuration is configured to detect a displacement of the high and low intensity bands along the detected fringe motion direction and provide respective spatial phase displacement signals that are indicative of the scale displacement. 1. A contamination and defect resistant optical encoder configuration for providing displacement signals , comprising:{'sub': 'SF', 'a scale that extends along a measuring axis direction, the scale comprising a scale grating comprising grating bars arranged in a scale plane that is nominally parallel to the measuring axis direction, wherein the grating bars are narrow along the measuring axis direction and elongated along a grating bar direction transverse to the measuring axis direction, and are arranged periodically at a scale pitch Palong the measuring axis direction;'}an illumination source comprising a light source that outputs light, and a structured illumination generating portion configured to input the light and output structured illumination to an illumination region at the scale plane where the structured illumination comprises an illumination fringe pattern comprising fringes that are narrow along the measuring axis direction and elongated along an ...

Servo motor controller

To provide a servo motor controller allowing to eliminate the risk of abnormal driving in a servo motor caused due to the inability to detect abnormality prior to establishment of absolute position. A device is configured to control a servo motor of an industrial machine. The device includes a position detection part configured to detect a position of the servo motor, a magnetic pole detection part configured to detect a magnetic pole position of the servo motor, and a pole position calculation part configured to, at least in initial calculation, obtain the magnetic pole position detected by the magnetic pole detection part as an initial magnetic pole position, prior to establishment of absolute position, and in the following calculation, incrementally obtain the magnetic pole position on the basis of data of the position detected by the position detection part and a magnetic pole interval of the motor.

CONTAMINATION AND DEFECT RESISTANT OPTICAL ENCODER CONFIGURATION FOR PROVIDING DISPLACEMENT SIGNALS

An optical encoder configuration comprises a scale, an illumination source, and a photodetector configuration. The illumination source is configured to output structured illumination to the scale. The scale extends along a measuring axis direction and is configured to output scale light that forms a detector fringe pattern comprising periodic high and low intensity bands that extend over a relatively longer dimension along the measuring axis direction and are relatively narrow and periodic along a detected fringe motion direction transverse to the measuring axis direction. The high and low intensity bands move along the detected fringe motion direction transverse to the measuring axis direction as the scale grating displaces along the measuring axis direction. The photodetector configuration is configured to detect a displacement of the high and low intensity bands along the detected fringe motion direction and provide respective spatial phase displacement signals that are indicative of the scale displacement. 1. A contamination and defect resistant optical encoder configuration for providing displacement signals , comprising:{'sub': 'SF', 'a scale that extends along a measuring axis direction, the scale comprising a scale grating comprising scale grating bars arranged in a scale plane that is nominally parallel to the measuring axis direction, wherein the scale grating bars are narrow along the measuring axis direction and elongated along a scale grating bar direction transverse to the measuring axis direction, and are arranged periodically at a scale pitch Palong the measuring axis direction;'}an illumination source comprising a light source that outputs light, and a structured illumination generating portion configured to input the light and output structured illumination along a source light path SOLP to an illumination region at the scale plane where the structured illumination comprises an illumination fringe pattern comprising fringes that are narrow along ...

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.

CONTROL DEVICE FOR AN ELECTRIC MACHINE, METHOD FOR CONTROLLING SAID ELECTRIC MACHINE, AND MOTOR CONTROLLER

The present invention discloses a control device for an electric machine comprising a sensor interface designed to receive a sensor signal from a position sensor of the electric machine, wherein the position sensor is designed to detect the rotor position of the electric machine, a signal generator designed to generate a beat signal that corresponds to the sensor signal with a signal frequency increased by a beat frequency, a summation unit designed to form a sum signal from the sum of the beat signal with the sensor signal, and a correction unit designed to calculate a correction value for the sensor signal on the basis of a minimum of the sum signal. The present invention further discloses a corresponding method and a corresponding motor controller. 112. A control device () for an electric machine () , the control device comprising:{'b': 3', '4', '5', '2', '5', '2, 'a sensor interface () designed to receive a sensor signal () from a position sensor () of the electric machine (), wherein the position sensor () is designed to detect the rotor position of the electric machine ();'}{'b': 6', '7', '4', '4', '23', '8, 'a signal generator () designed to generate a beat signal () on the basis of the sensor signal (), said beat signal corresponding to the sensor signal () with a signal frequency () increased by a beat frequency ();'}{'b': 9', '10', '7', '4, 'a summation unit () designed to form a sum signal () from the sum of the beat signal () with the sensor signal ();'}{'b': 11', '12', '4', '20', '21', '10, '-a correction unit () designed to calculate a correction value () for the sensor signal () on the basis of a minimum (, ) of the sum signal ().'}2. The control device according to claim 1 ,{'b': 4', '13', '14, 'wherein the sensor signal () comprises a sine signal () and a cosine signal ();'}{'b': 6', '16', '13', '17', '14, 'wherein the signal generator () is designed to generate a sine beat signal () for the sine signal () and a cosine beat signal () for the cosine ...

ANGLE SENSOR, A BEARING UNIT, ELECTRICAL MOTOR, A CONTROL SYSTEM AND ERROR-CHECK SYSTEM

An angle sensor is provided for determining an absolute angle signal of a first part rotated with respect to a second part. The angle sensor comprises a first grating ring for generating a first signal representative of a relative position of a first sensor along a corresponding ring segment of the first grating ring. The angle sensor further comprises a second grating ring for generating a second signal representative of a relative position of a second sensor along the corresponding ring segment of the second grating ring. The first plurality and the second plurality are co-prime numbers and a difference between the first plurality and the second plurality being larger than 1. The angle sensor also comprises a calculator configured for calculating the absolute angle signal using a first linear combination of the first signal and the second signal. 1. An angle sensor for determining an absolute angle signal of a first part rotated with respect to a second part , the angle sensor comprising:a first grating ring being constituted of a first plurality of first grating elements being arranged adjacent to each other constituting ring segments, each first grating element interacting with a first sensor for generating a first signal representative of a relative position of the first sensor along the corresponding ring segment of the first grating ring,a second grating ring being constituted of a second plurality of second grating elements being arranged adjacent to each other constituting ring segments, each second grating element interacting with a second sensor for generating a second signal representative of a relative position of the second sensor along the corresponding ring segment of the second grating ring, the first grating ring and the second grating ring being configured to rotate the same rotation angle as the first part is rotated with respect to the second part, the first plurality and the second plurality being co-prime numbers and a difference between the ...

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.

Optical position-measuring device

In an optical position-measuring device for acquiring the rotational angle between two objects that are rotationally moveable relative to each other, a grating measuring standard rotating about an axis of rotation is arranged as a reflection grating. Position information both about an azimuthal rotary movement about the axis of rotation and about a radial displacement of the grating measuring standard is able to be obtained. At least one detection unit is used for scanning the rotating grating measuring standard in order to determine the azimuthal rotational angle as well as a radial displacement of the grating measuring standard. The neutral pivot points of the scanning of the grating measuring standard for the determination of the rotational angle and the displacement are situated in the same plane, with this plane being situated in parallel with the grating measuring standard. The neutral pivot point denotes the particular location about which the grating measuring standard or the detection unit is able to be tilted without a position offset.

METHOD AND APPARATUS FOR MONITORING A RESOLVER

A resolver disposed to monitor a rotatable member is described, along with an associated method for evaluating an output signal therefrom. The method for monitoring the resolver includes supplying an excitation signal to the resolver, and monitoring, at an oversampling rate, first and second output signals from the resolver. An oversampling routine is executed to determine averages of the first and second output signals from the resolver. A demodulation angle error is determined based upon the first and second output signals from the resolver, and provided as feedback. A position of the resolver is also determined based upon the first and second output signals from the resolver. 1. A method for evaluating a resolver disposed to monitor a rotatable member of a device , the method comprising:supplying an excitation signal to the resolver;monitoring, at an oversampling rate, first and second output signals from the resolver, wherein the oversampling rate is greater than a baseline sampling rate;executing an oversampling routine to determine averages of the first and second output signals from the resolver;determining a demodulation angle error based upon the averages of the first and second output signals from the resolver; anddetermining a position of the resolver based upon the averages of the first and second output signals from the resolver.2. The method of claim 1 , further comprising detecting a fault associated with the resolver based upon the monitoring of the first and second output signals from the resolver at the oversampling rate.3. The method of claim 1 , wherein executing the oversampling routine comprises:capturing a plurality of first states associated with the first output signal at the oversampling rate, and capturing a plurality of second states associated with the second output signal at the oversampling rate;separating the plurality of first states into a plurality of first subsets, and separating the plurality of second states into a plurality of ...

SENSOR DEVICE FOR CAPTURING THE ROTATIONAL POSITION OF A ROTATING SHAFT WITH ULTRASONICALLY WELDED ENCODER MAGNETS

A sensor device may be utilized to detect an angular position of a rotating shaft that is rotatably supported in a housing. The sensor device may include a transducer magnet that is attached to a supporting part that is connected to the rotating shaft. The supporting part may be joined to the transducer magnet by an ultrasonic weld. The ultrasonic weld may be bonded and shape-locking. The supporting part may be configured as a sonotrode during creation of the ultrasonic weld. Further, an exterior of the supporting part, which can be a supporting rod, may comprise cross knurling or longitudinal knurling. 116.-. (canceled)17. A sensor device for detecting an angular position of a rotating shaft that is rotatably supported in a housing , the sensor device comprising a transducer magnet that is attached to a supporting part that is connected to the rotating shaft , wherein the supporting part is joined to the transducer magnet via an ultrasonic weld.18. The sensor device of wherein the ultrasonic weld is bonded and shape-locking.19. The sensor device of wherein the supporting part is configured as a sonotrode during creation of the ultrasonic weld.20. The sensor device of wherein the supporting part is a supporting rod.21. The sensor device of wherein the transducer magnet is ring-shaped and encloses the supporting rod.22. The sensor device of wherein an exterior of the supporting part comprises knurling.23. The sensor device of wherein the knurling is cross knurling.24. The sensor device of wherein the knurling is longitudinal knurling.25. An electromechanical power steering system for a motor vehicle claim 17 , the electromechanical power steering system comprising the sensor device of .26. The electromechanical power steering system of wherein the rotating shaft is a steering shaft of the electromechanical power steering system.27. The electromechanical power steering system of wherein the rotating shaft is a rotor shaft of an electric motor.28. A method for ...

METHOD AND DEVICE FOR MONITORING THE TRACK SIGNALS OF A POSITION CHANGE SENSOR

In a method and device for monitoring the track signals of a position change sensor, a resource-optimized diagnosis of errors of track signals of a position change sensor is performed. 112-. (canceled)13. A method for monitoring track signals of a position change sensor , comprising:cyclically sampling the track signals of the position change sensor using a chronological sequence; andevaluating sampling values obtained in the sampling step;wherein the sequence includes time periods, each time period including more than four sampling times set apart temporally from each other at regular intervals, and each time period corresponding to a respective temporal spacing.14. The method according to claim 13 , wherein the method is performed with the aid of an encoder signal diagnostic device.15. The method according to claim 13 , wherein the sequence includes a succession of sampling times.16. The method according to claim 13 , wherein each time period is uniquely corresponds to a respective spacing.17. The method according to claim 13 , wherein the temporal spacing corresponding to a first one of the time periods is less than the temporal spacing corresponding to a second one of the time periods occurring later within the sequence.18. The method according to claim 17 , wherein the temporal spacing corresponding to a time period of the sequence directly following a preceding time period of the sequence is twice as large as the temporal spacing correspinding to the preceding time period.19. The method according to claim 13 , wherein the spacing corresponding to a temporally-first time period of the sequence corresponds to a fifth of a period length of a maximum permissible frequency of output signals of the position change sensor or less claim 13 , and/or the spacing corresponding to a temporally-last time period of the sequence corresponds to a fifth of a period length of a limiting signal frequency or less.20. The method according to claim 13 , further comprising further ...

METHOD FOR MOUNTING A SENSOR BEARING UNIT, AND SENSOR BEARING UNIT ADAPTED TO SUCH A METHOD

A method for mounting a sensor bearing unit providing a bearing and an impulse ring provided with a target holder and with a target mounted on an axial portion of the target holder. The method including measuring an eccentricity Ebetween the target and the axial portion of the target holder, measuring an eccentricity Ebetween a groove made in the bore of an inner ring of the bearing and the bore, introducing the target holder inside the groove, turning the target holder inside the groove to an angular position in which the eccentricity Ebetween the target and the bore of the inner ring is less than or equal to a predetermined value which is lower than the sum of the eccentricities Eand E, and securing the target holder inside the groove of the inner ring at the angular position. 1. A sensor bearing unit , comprising:an outer ring;an inner ring, when viewed in cross section, having a bore therethrough formed, in part, by a radially innermost axially extending inner ring surface, the inner ring and the outer ring being configured for relative rotation therebetween around a rotation axis;a plurality of rolling elements disposed between the outer ring and the inner ring; and a target; and', 'a target holder, when viewed in cross section, having a radially innermost axial target holder portion, the target being positioned on the target holder;, 'an impulse ring, comprisingwherein the inner ring, when viewed in cross section, further defines a cylindrical groove which extends radially outwardly from the radially innermost axially extending surface of the inner ring, the cylindrical groove having a greater diameter than a portion of the bore formed by the radially extending innermost axially extending surface, the cylindrical groove being configured for mounting the radially innermost axial target holding portion thereby fastening the impulse ring to the inner ring.2. The sensor bearing unit of claim 1 , wherein the target is mounted on an inner cylindrical surface of a ...

SYSTEM AND METHOD FOR MONITORING ANALOG FRONT-END (AFE) CIRCUITRY OF AN INDUCTIVE POSITION SENSOR

A system and method for monitoring analog front-end (AFE) circuitry of an inductive position sensor. A redundant AFE channel is provided and alternatively utilized with a sine AFE channel or a cosine AFE channel of the AFE circuitry to obtain a voltage difference that may result in a detection angle error at the electronic control unit (ECU) of the inductive position sensor. 1. A method for monitoring analog front-end (AFE) circuitry of an inductive position sensor , the method comprising:establishing a redundant analog front-end (AFE) channel having an output coupled to a redundant AFE channel buffer in AFE circuitry of an inductive position sensor, the AFE circuitry further comprising a sine signal AFE channel, a cosine signal AFE channel, a sine AFE channel buffer coupled to the output of the sine signal AFE channel and a cosine AFE channel buffer coupled to the output of the cosine signal AFE channel;alternately selecting a sine output signal or a cosine output signal from a receiver coil of the inductive position sensor; when the sine output signal is selected, obtaining a voltage difference as a difference between an output voltage of the sine AFE channel buffer and an output voltage of the redundant AFE channel buffer;', 'when the cosine output signal is selected, obtaining the voltage difference as the difference between an output voltage of the cosine AFE channel buffer and an output voltage of the redundant AFE channel buffer; and, 'processing the sine output signal through the redundant AFE channel and the redundant AFE channel buffer when the sine output signal is selected or processing the cosine output signal through the redundant AFE channel and the redundant AFE channel buffer when the cosine output signal is selected;'}signaling a fault condition if the voltage difference is greater than a predetermined threshold voltage.2. The method of claim 1 , wherein the voltage difference equates to an angular error at an electronic control unit (ECU) coupled ...

METHOD FOR DETERMINING THE POSITION OF A MOTOR VEHICLE CRANKSHAFT

A method for determining the position of a motor-vehicle crankshaft with a rotating target wheel including markers distributed uniformly over its periphery and a signature, and a sensor sending an electrical signal with edges that appear during the passage of a marker or of the signature before the sensor, including: determining detection time of an edge; determining detection time and computing time difference between estimation and determination; determining angular error; determining presence of an abnormal edge when the angular error exceeds a threshold and storing the associated marker number in a first error list; when the signature passes, copying the first error list to the second if it does not exist; adjusting an occurrence counter depending on the error list; and if the errors are not transient, correcting edges with marker numbers in memory in the second error list, then sending a crankshaft position signal depending on the signal. 1. A method for determining the position of a motor-vehicle crankshaft equipped with a rotating target wheel comprising markers distributed uniformly over a periphery of the target wheel and a signature , and a sensor configured to send an electrical signal comprising a succession of edges that appear during the passage of a marker or of the signature in front of the sensor , the method comprising:on each edge of the rotating target wheel up to the edge corresponding to the signature,the time of detection of an edge is determined (1) then the time of detection of the next edge is estimated depending on the speed of rotation of the crankshaft and the history of the previous edges,the time of detection of the next edge is determined (2) then the time difference between the estimation of the time of detection of the next edge and the determination of the time of detection of the next edge is computed,an angular error is determined (3) depending on the determination of the time of detection of the next edge and on the time ...

Rotation detection device

A rotation detection device includes a first mold IC, a second mold IC, and a housing. The first mold IC and the second mold IC are each housed in a point-symmetrical position with respect to a reference point in the housing. The housing includes a connector having (i) a first terminal electrically connected to the first mold IC, (ii) a second terminal electrically connected to the second mold IC, and (iii) a GND terminal that is electrically connected to both of the first and second mold ICs. The connector is arranged at a position corresponding to the reference point on the housing.

Magnetic Field Sensor With Shared Path Amplifier And Analog-To-Digital-Converter

Methods and apparatus for processing a signal comprise at least one circuit configured to generate a measured signal during a measured time period and a reference signal during a reference time period. Also included is at least one dual- or multi-path analog-to-digital converter comprising at least a first processing circuit configured to process the measured signal, at least a second processing circuit configured to process the reference signal, and a third processing circuit configured to process both the measured signal and the reference signal. 1. A magnetic field sensor comprising:at least one magnetic field sensing element configured to generate a measured magnetic field signal responsive to an external magnetic field and to generate a reference magnetic field signal responsive to a reference magnetic field; anda signal path comprising an amplifier and an analog-to-digital converter for processing the measured magnetic field signal to generate a sensor output signal indicative of the external magnetic field during a measured time period and for processing the reference magnetic field signal to generate a diagnostic signal indicative of whether a fault is present during a non-overlapping reference time period.2. The magnetic field sensor of further comprising a reference coil proximate to the at least one magnetic field sensing element claim 1 , wherein the reference coil is configured to carry a reference current to generate the reference magnetic field.3. The magnetic field sensor of wherein the at least one magnetic field sensing element is configurable to generate the measured magnetic field signal during the measured time period and to generate the reference magnetic field signal during the non-overlapping reference time period.4. The magnetic field sensor of further comprising an analog-to-digital converter responsive to the measured magnetic field signal to generate a digital measured magnetic field signal and responsive to the reference magnetic field ...

METHOD OF MANUFACTURING ROTARY SCALE, ROTARY SCALE, ROTARY ENCODER, DRIVING APPARATUS, IMAGE PICKUP APPARATUS AND ROBOT APPARATUS

A method of manufacturing a rotary scale to be fixed to a rotating shaft of a rotating member includes a first step of forming, on a scale substrate, a scale pattern and a mark indicating an outer shape of the rotating shaft positioned such that a center axis of the rotating shaft coincides with a center axis of the scale pattern, a second step of cutting a first area of the scale substrate including the mark and having a first width, and a third step of cutting a second area including the mark that remains after the cutting of the first area, having a length in a circumferential direction of the scale substrate shorter than that in the first area and having a second width narrower than the first width. 1. A rotary scale to be fixed to a rotating shaft of a rotating member , the rotary scale comprising:a scale pattern; anda protrusion formed by cutting a first area of the rotary scale that includes a mark indicating an outer shape of the rotating shaft positioned such that a center axis of the rotating shaft coincides with a center axis of the scale pattern and that has a first width and then cutting a second area, the second area including the mark that remains after the cutting of the first area, having a length in a circumferential direction of the rotary scale shorter than that in the first area and having a second width narrower than the first width.2. The rotary scale according to claim 1 , wherein the protrusion is provided at least three locations in the circumferential direction.3. The rotary scale according to claim 1 , wherein the protrusion is provided more inside than the scale pattern.4. The rotary scale according to claim 1 , wherein the protrusion is provided more outside than the scale pattern.5. The rotary scale according to claim 1 , wherein the protrusion has a taper shape formed by cutting the first area.6. A rotary encoder comprising:a rotary scale to be fixed to a rotating shaft of a rotating member; anda detector configured to detect light ...

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 , ...

Incremental Encoder Position Interpolation

An interpolated position of an incremental encoder is provided. A first signal and a second signal having a quadrature relationship are received from the incremental encoder. A coarse position of the incremental encoder at a first time is produced using the quadrature relationship between the first signal and the second signal. An arcsine or arccosine value based on the first signal at the first time is determined using a lookup table and a fine position of the incremental encoder is calculated using the determined value. The interpolated position of the incremental encoder, based on both the coarse position and the fine position, is then provided. 1. A method to provide an interpolated position of an incremental encoder , the method comprising:receiving a first signal from the incremental encoder;producing a coarse position of the incremental encoder based on the first signal;retrieving a lookup value from a lookup table based on the first signal;calculating a fine position of the incremental encoder using the lookup value; andproviding the interpolated position of the incremental encoder based on both the coarse position and the fine position.2. The method of claim 1 , wherein the lookup table stores values based on an arcsine or an arccosine of a value of the lookup address claim 1 , wherein the value of the lookup address is interpreted as a number between 0 and 1.3. The method of claim 1 , further comprising:receiving a second signal from the incremental encoder, the first signal and the second signal having a quadrature relationship; andproducing the coarse position of the incremental encoder using the quadrature relationship between the first signal and the second signal.4. The method of claim 1 , further comprising:establishing a first zero-crossing value for the first signal;obtaining a digital value of the first signal at a first time;ascertaining a quadrant of the first signal at the first time;computing a lookup address based on a difference between the ...

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.

Rotation detection apparatus, motor control apparatus, motor driven apparatus, method of correcting rotation detection apparatus, and non-transitory computer-readable storage medium storing correction program

The rotation detection apparatus includes a rotatable member rotatable with rotation of a motor and having multiple pattern element portions in its rotational direction, a signal outputter to output a detection signal changing in response to rotation of the pattern element portions, and a memory storing correction values each provided for each of the pattern element portions and used to perform correction of an error in a relation between rotational positions of the rotatable member and the change of the detection signal. A corrector performs the correction with reference to a reference position of the rotatable member in an origin state where a driven member driven by the motor is located at its origin position and by using each of the correction values for each change of the detection signal when the rotatable member is rotated from the reference position.

BUILDING BLOCK FOR A MECHANICAL CONSTRUCTION

The invention provides a building block for a mechanical construction. The invention further provides a bearing and a method of producing the building block. The building block provides a first printed material printed via an additive manufacturing process on or at least partially embedded in a second material. The first printed material is printed in a pattern configured and constructed for cooperating with a sensor for providing position information of the building block relative to the sensor. The sensor may be a magnetic sensor or an optical sensor. The first printed material may include magnetic particles. The method of producing the building block may include a step of adding the first printed material to the second material via the additive manufacturing process under the influence of a predefined magnetic field. 1100230280290330350100230280290330350. A building block ( , , , , , ) for a mechanical construction , the building block ( , , , , , ) comprising:a first printed material printed via an additive manufacturing process on or at least partially embedded in a second material, whereinthe first printed material is printed in a pattern configured and constructed for cooperating with a sensor for providing position information of the building block relative to the sensor, whereinthe pattern of the first printed material comprises a first pattern for providing a first signal to the sensor and a second pattern different from the first pattern for providing a second signal to the sensor different from the first signal.2. The building block according to claim 1 , wherein at least a part of the building block is constituted of the second material being second printed material printed via an additive manufacturing process.3. The building block according to claim 1 , wherein the first printed material:comprises magnetic particles for cooperating with a magnetic sensor, orconstitutes a reflective pattern for cooperating with an optical sensor, orconstitutes a ...

Magnetic encoder

To provide a magnetic encoder in which a base material has a ring-shaped body portion into which a rotation axis is inserted when a magnetic drum is mounted on a rotation axis, and an engagement convex portion provided so as to project over a whole circumference of an outer periphery of the body portion. The body portion has a centering track provided in a part of the outer periphery of the body portion over the whole circumference as a reference of circular runout tolerance on an outer periphery of a magnet. The engagement convex portion has a constricted portion projecting from the outer periphery of the body portion, and a cylindrical portion extending in an axial direction of the body portion from a tip end of the constricted portion. The magnet surrounds the engagement convex portion so as to wrap around to a gap between the cylindrical portion and the body portion, and exposes the centering track without covering the centering track.

MEASURING SYSTEM AND DRIVE SYSTEM

A measuring system and drive system with a measuring system, a magnet, a transmitter, and a magnetic field sensor. The magnetic field sensor is arranged between the magnet and the transmitter. The transmitter has a number of segments made of a magnetically conductive material, each segment having a wing shape with a web edge that is radially directed outwards, each web edge being diagonally designed towards the rotational direction, and that each web edge is distanced from the magnetic field sensor by an air gap. 1. A measuring system comprising:a magnet;a transmitter rotating about an axis in a rotational direction;a magnetic field sensor arranged between the magnet and the transmitter, the transmitter having a plurality of segments made of a magnetically conductive material, at least two of the plurality of segments having a wing shape with a web edge that is radially directed outwards, each web edge being arranged diagonally towards the rotational direction, and each web edge arranged at a distance from the magnetic field sensor by an air gap.2. The measuring system according to claim 1 , wherein the mass of the segments is distributed in a rotationally symmetric manner.3. The measuring system according to claim 1 , wherein the segments are arranged on a hub.4. The measuring system according to claim 3 , wherein the segments and the hub are designed in one piece.5. The measuring system according to claim 3 , wherein the segments and the hub are made of grey cast iron.6. The measuring system according to claim 1 , wherein the magnetic field sensor has a first sensor element for the measurement of a magnetic field component in a first spatial direction claim 1 , a second sensor element for the measurement of a magnetic field component in a second spatial direction claim 1 , and a third sensor element for the measurement of a magnetic field component in a third spatial direction.7. The measuring system according to claim 1 , wherein the segments generate an air flow ...

Sensor Housing for a Wheel Sensor Device, Wheel Sensor Device and Connecting Component Thereof

A sensor housing for a wheel-sensor device for a vehicle includes a first receiving aperture, a second receiving aperture, a first rotational-speed sensor, a rotary transducer, and a second rotational-speed sensor. The first sensor is configured to be inserted into the first aperture, and the sensor housing with the inserted first sensor is configured to be mounted on the vehicle. The rotary transducer is configured to co-rotate with a vehicle wheel and to trigger a change in a first physical quantity. The second sensor is configured to be inserted adjacent to the first sensor in the first aperture or in the second aperture, and the sensor housing, with the inserted first and second sensors, is configured to be mounted on the vehicle. The rotary transducer co-rotating with the rotating wheel triggers the change in the first physical quantity and a change in a second physical quantity.

DUTY CYCLE OF AN OUTPUT SIGNAL OF A MAGNETIC FIELD SENSOR TO DETECT SPEED AND DIRECTION OF ANGULAR ROTATION OF A ROTATING MAGNETIC STRUCTURE OR A FAULT

In one aspect, an integrated circuit (IC) includes a magnetic field sensor to detect speed and direction of angular rotation of a rotating magnetic structure. The magnetic field sensor includes at least two magnetic field sensing elements configured to sense changes in a magnetic field caused by rotation of the magnetic structure. The IC also includes an output port configured to provide an output signal of the magnetic field sensor. A duty cycle percentage of the output signal indicates the speed and the direction or indicates a fault. 1. An integrated circuit (IC) comprising: 'at least two magnetic field sensing elements configured to sense changes in a magnetic field caused by rotation of the magnetic structure;', 'a magnetic field sensor to detect speed and direction of angular rotation of a rotating magnetic structure, the magnetic field sensor comprisingan output port configured to provide an output signal of the magnetic field sensor, a duty cycle percentage of the output signal indicating the speed and the direction or indicating a fault.2. The IC of claim 1 , wherein the duty cycle percentage of the output voltage being within a first duty cycle percentage range indicating the magnetic structure rotating in a first direction.3. The IC of claim 2 , wherein the duty cycle percentage of the output voltage being within a second duty cycle percentage range indicating the magnetic structure rotating in a second direction opposite the first direction.4. The IC of claim 3 , wherein the duty cycle percentage of the output voltage being below the first duty cycle percentage range indicating one or more faults.5. The IC of claim 3 , wherein the duty cycle percentage of the output voltage being above the second duty cycle percentage range indicating one or more faults.6. The IC of claim 3 , wherein the duty cycle percentage of the output voltage being above the first duty cycle percentage range and being below the second duty cycle percentage range indicating one or ...

Method for counting revolutions of a wheel

The invention relates to a method for counting revolutions of a wheel (6) to which a target (7) is attached, the counting method comprising the step of: generating an oscillating signal representing the presence or the absence of the target (7); comparing an amplitude of the signal with a voltage threshold in order to obtain pulses (19); and detecting the presence of the target (7) or the absence of the target on the basis of the number of pulses obtained. The method also comprises a step of detecting a disruption which is implemented as feedback and which consists in acquiring differential pulse values each equal to a difference between two numbers of pulses obtained during two consecutive detection intervals, and in detecting a disruption upon identifying an erroneous sequence of consecutive differential pulses. A consumption meter and a computer program corresponding to the method and means for storing such a program are also claimed.

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.

MAGNETIC FIELD SENSOR ARRANGEMENT AND METHOD FOR PROCESSING A MAGNETIC FIELD SENSOR OUTPUT SIGNAL

A magnetic field sensor arrangement includes a magnetic field sensor element configured to provide a sensor output signal responsive to a magnetic field, wherein the sensor output signal is representative of a magnetic field amplitude; a processing module configured to provide a processed sensor output signal representative of the sensor output signal; a switching level calculation module configured to calculate a switching level, (1) during a power up mode, based on a default switching level, and (2) during a running mode, based on the processed sensor output signal; a comparator module configured to compare the processed sensor output signal with the switching level, and to provide a comparator output signal based on the comparison; and a storage module configured to store the default switching level, provide the default switching level during the power up mode, and update the default switching level during the running mode. 1. A magnetic field sensor arrangement , comprising:a magnetic field sensor element configured to provide a sensor output signal responsive to a magnetic field, wherein the sensor output signal is representative of a magnetic field amplitude,a processing module configured to process the sensor output signal and to provide a processed sensor output signal which is representative of the sensor output signal,a switching level calculation module configured to determine a first switching level, during a power up mode, based on a default switching level, and determine, during a running mode, a second switching level based on the processed sensor output signal;a comparator module configured to receive the first switching level and the second switching level, compare the processed sensor output signal with the first switching level during the power up mode, compare the processed sensor output signal with the second switching level during the running mode, and to provide a comparator output signal based on each comparison; and store the default ...

Hall Sensor and Method for Operation of Such a Sensor

A Hall sensor has a Hall sensor element, which has multiple connection points spaced apart from one another. A supply source serves for feeding an exciter current into the Hall sensor element and is connected to a first and a second connection point of the Hall sensor element. The Hall sensor has a first and a second comparison device. The first comparison device has a first input connected to a third connection point of the Hall sensor element, a second input connected to a reference signal generator for an upper reference value signal, and an output for a first comparison signal. The second comparison device has a third input connected to the third connection point, a fourth input connected to a reference signal generator for a lower reference value signal, and an output for a second comparison signal. The outputs are connected to an evaluation device for generating an error signal as a function of the first and second comparison signal. 1. A method for operation of a Hall sensor , which has the following steps:a) providing a Hall sensor, which has a Hall sensor element having multiple connection points spaced apart from one another, and providing a current supply source or voltage supply source, which has supply connectors for output of a supply current or a supply voltage,b) connecting a first connection point of the Hall sensor element to a first supply connector and connecting a second connection point of the Hall sensor element to a second supply connector, so as to apply the supply voltage to the Hall sensor element or to conduct the supply current through the Hall sensor element,characterized by the following further steps:c) providing a lower reference value and an upper reference value for a voltage applied at a third connection point of the Hall sensor element,d) detecting a first voltage value for this voltage,e) comparing the first voltage value with the lower reference value and the upper reference value,f) generating an error signal as a function of ...

Magnetic Field Sensor And Method Having Reduced False Switching

A magnetic field sensor includes a substrate first and second magnetic field sensing elements, comprising first and second magnetoresistance elements, respectively. The first and second magnetic field sensing elements are responsive to the magnet. At or more positions of the magnet relative to the first and second magnetic field sensing elements while the magnet is stopped moving, at least one of the first magnetic field sensing element or the second magnetic field sensing element is in saturation in response to the magnet. The magnetic field sensor also includes a third magnetic field sensing element proximate to the first and second magnetoresistance elements, the third magnetic field sensing element operable to generate a third magnetic field sensing element signal responsive to the magnet, wherein, at the one or more positions while the magnet is stopped moving, the third magnetic field sensing element is not in saturation in response to the magnet or saturates at a higher magnetic field than the first and second magnetic field sensing elements in response to the magnet.

Magnetic Encoder Calibration

A method for calibrating a position measurement system includes receiving measurement data from the position measurement system and determining that the measurement data includes periodic distortion data. The position measurement system includes a nonius track and a master track. The method also includes modifying the measurement data by decomposing the periodic distortion data into periodic components and removing the periodic components from the measurement data.

DEVICE FOR DETECTING POSITION OF ROTOR, AND MOTOR COMPRISING SAME

The present invention provides a rotor position detection device including a sensor having a first chip and a second chip which are aligned with a first line and detect a change in magnetic flux in a sensing magnet, wherein the sensor has the first line which is inclined with respect to a second line passing through any one of the first chip and the second chip in a radial direction of the sensing magnet. Accordingly, the present invention provides an advantageous effect of detecting a rotational direction and a precise rotational angle of the motor by utilizing one sensor. 1. A rotor position detection device comprising a sensor including a first chip and a second chip which are aligned with a first line and detect a change in magnetic flux in a sensing magnet ,wherein the sensor has the first line which is inclined with respect to a second line passing through any one of the first chip and the second chip in a radial direction of the sensing magnet,wherein the sensing magnet include a main magnet and a sub-magnet disposed outside of the main magnet,wherein N-pole split magnets and S-pole split magnets in the sub-magnet are alternately disposed in a circumferential direction,wherein a distance between the first chip and the second chip in a circumferential direction of the sensing magnet is smaller than a width of the split magnet in the circumferential direction of the sensing magnet,wherein the width of the split magnet is set with respect to a center of the sub magnet in the radial direction of the sensing magnet,wherein the first chip and the second chip are aligned on one split magnet, andwherein the sensor includes a first chip and a second chip in one body thereof.2. The rotor position detection device of claim 1 , wherein the sub-magnet has seventy-two split magnets claim 1 , and the main magnet has six split magnets.3. (canceled)4. (canceled)5. The rotor position detection device of claim 1 , wherein the first chip and the second chip are spaced the same ...

IN-VEHICLE ELECTRONIC CONTROL UNIT

An in-vehicle electronic control unit (ECU) for correcting an error introduced to a sensor output signal as a result of amplification is provided. An output voltage of first and second voltage generators and after-amplification voltages of such output voltages are respectively A/D converted for input into a linear function. A microcomputer adjusts the output voltage of the first and second voltage generators which are amplified by the amplification circuit so that the output signals of the first and second voltage generators are adjusted to increase a voltage difference between the two. The increased voltage difference allows accurate identification of the linear function and removal of the error that is introduced to the sensor output signal during the course of processing by the amplification circuit. 1. An in-vehicle electronic control unit (ECU) comprising:a signal process circuit that receives and processes a sensor output signal from a sensor;a multi-channel A/D converter that performs an A/D conversion of the sensor output signal that has been processed by the signal process circuit;a microcomputer that processes an A/D conversion value that is derived from the A/D conversion of the sensor output signal by the multi-channel A/D converter;a first voltage generator and a second voltage generator that switch an output voltage according to an instruction from the microcomputer; andan input signal switcher that switches the sensor output signal for input into the signal process circuit according to an instruction from the microcomputer, the sensor output signal for input is either (i) the sensor output signal from the sensor or (ii) a first output signal generated by the first voltage generator or a second output signal generated by the second voltage generator, wherein(A) the signal process circuit divides the sensor output signal that is input to the ECU into a first signal and a second signal, the first signal is input into a first input terminal of the multi- ...

Correction apparatus and method for angle sensor, and angle sensor

A correction apparatus for an angle sensor includes a correction information generator for generating correction information, and a correction processing unit for performing correction processing in the course of generation of a detected angle value by an angle detector. Details of the correction processing are determined on the basis of the correction information. The correction information generator includes an error estimate generation unit and a correction information determination unit. The error estimate generation unit generates, on the basis of a first signal and a second signal, an error estimate containing a variable component that varies depending on an ideal angle estimate. The correction information determination unit determines the correction information on the basis of the error estimate.

Position Measuring System

A position measuring system includes a first portion and a second portion, which can be moved relative to the first portion. The first portion has a material measure having a multiplicity of markings that are each able to assume two different values. A number m of directly successive markings codes a respective explicit absolute position along the material measure, and a number m−1 of directly successive markings does not code an explicit absolute position. The second portion has a scanning device having a number k of individual sensors for scanning a number n of directly successive markings. The scanning device is functionally connected to an evaluation device in order to ascertain the position of the second portion relative to the first portion. The condition n>m is satisfied, and the evaluation device is configured to recognize a scanning error in the scanning device.

Systems and methods for detecting magnetic turn counter errors with redundancy

Systems and methods for detecting magnetic turn counter errors with redundancy are provided. In one aspect, a magnetic field turn sensor system includes a magnetic field angle sensor having a sine bridge and a cosine bridge and first to third comparators configured to compare the outputs from the sine and cosine bridges. The system further includes a processor configured to receive outputs from each of the first to third comparators, determine that a combination of the outputs from the first to third comparators corresponds to an invalid state, and indicate a fault in response to determining that the combination of the outputs from the first to third comparators corresponds to the invalid state.

Synchronization of an internal combustion engine

A current source sensor delivers detection information in the form of an intermediate signal by selectively applying a low-level or high-level current to a communication bus depending on the passage of a mobile target, the sensor including a sensitive portion detecting the passage of a of the mobile target, an electronic module controlling and shape signals coming from the sensitive portion, an embedded intelligence module designed, inter alia, to receive information from another sensor through a first signal present on the communication bus, the first signal being the sum of the abovementioned intermediate signal generated by the sensor and of another intermediate signal generated by the other sensor, wherein the embedded intelligence module is adapted to modify a first low level and a first high level of the intermediate signal, respectively, into a second low level and into a second high level depending on a the first signal.

SYSTEMS AND METHODS FOR DETECTING MAGNETIC TURN COUNTER ERRORS

Systems and methods for detecting magnetic turn counter errors are provided herein. In one aspect, there is provided a magnetic field turn sensor system including: a magnetic field angle sensor, a signal processing path configured to receive an output from the magnetic field angle sensor and generate an angle measurement based on the output, a turn count path configured to process the output from the magnetic field angle sensor and output a quadrant measurement based on the output and a processor. The processor is configured to: receive the angle measurement from the signal processing path and the quadrant measurement from the turn count path, determine that the angle measurement deviates from the expected transition angle by more than a threshold value, and indicate a fault in response to determining that the angle measurement deviates from the expected transition angle by more than the threshold value. 1. A magnetic field turn sensor system , comprising:a magnetic field angle sensor;a signal processing path configured to receive an output from the magnetic field angle sensor and generate an angle measurement based on the output;a turn count path configured to process the output from the magnetic field angle sensor and output a quadrant measurement based on the output; and{'claim-text': ['receive the quadrant measurement from the turn count path,', 'determine that the quadrant measurement is indicative of a transition between quadrants,', 'obtain an expected transition angle at which the quadrant measurement is indicative of the transition between quadrants,', 'receive the angle measurement from the signal processing path,', 'determine that the angle measurement deviates from the expected transition angle by more than a threshold value, and', 'indicate a fault in response to determining that the angle measurement deviates from the expected transition angle by more than the threshold value.'], '#text': 'a processor configured to:'}2. The system of claim 1 , wherein ...

Incremental Encoder Position Interpolation

An interpolated position of an incremental encoder is provided. A first signal and a second signal having a quadrature relationship are received from the incremental encoder. A coarse position of the incremental encoder at a first time is produced using the quadrature relationship between the first signal and the second signal. An arcsine or arccosine value based on the first signal at the first time is determined using a lookup table and a fine position of the incremental encoder is calculated using the determined value. The interpolated position of the incremental encoder, based on both the coarse position and the fine position, is then provided. 1. A method to provide an interpolated position of an incremental encoder , the method comprising:receiving a first signal from the incremental encoder;producing a coarse position of the incremental encoder and a lookup address based on the first signal;retrieving a lookup value representing an arcsine or an arccosine of a value of the lookup address from a lookup table;calculating a fine position of the incremental encoder using the lookup value; andproviding the interpolated position of the incremental encoder based on both the coarse position and the fine position.2. The method of claim 1 , further comprising:receiving a second signal from the incremental encoder, the first signal and the second signal having a quadrature relationship; andproducing the coarse position of the incremental encoder using the quadrature relationship between the first signal and the second signal.3. The method of claim 1 , further comprising:establishing a first zero-crossing value for the first signal;obtaining a digital value of the first signal at a first time;ascertaining a quadrant of the first signal at the first time;computing a lookup address based on a difference between the digital value and the first zero-crossing value;using the lookup address to retrieve the lookup value from the lookup table; andcalculating the fine position ...

RESOLVER AND MOTOR

A resolver includes a resolver rotor fixed to a rotating shaft, and a resolver stator disposed around the resolver rotor. The resolver stator includes an annular stator core having a plurality of salient poles which protrudes radially inward and which is disposed at regular intervals in a circumferential direction. The resolver rotor has an outer peripheral surface defined by an outer radius Rm(φ) which is obtained by blending, with respect to a first function Gp(φ) where an air gap between the resolver rotor and the salient poles is proportional to a sine wave (sin φ) related to an angle φ of the resolver rotor, a second function Gip(φ) where the inverse of the air gap is proportional to the sine wave (sin φ), at a predetermined ratio α. 1. A resolver comprising:a resolver rotor fixed to a rotating shaft; anda resolver stator disposed around the resolver rotor,wherein:the resolver stator includes an annular stator core which has a plurality of salient poles protruding radially inward and which is disposed at regular intervals in a circumferential direction; andthe resolver rotor has an outer peripheral surface defined by an outer radius obtained by blending, with respect to a first function where an air gap between the resolver rotor and the salient poles is proportional to a sine wave related to an angle of the resolver rotor, a second function where an inverse of the air gap is proportional to the sine wave, at a predetermined ratio.2. The resolver according to claim 1 , wherein the ratio is set greater than zero claim 1 , and is set to a greater value as a modulation factor representing a variable amplitude of an output signal from the resolver with respect to an average value of the output signal becomes smaller.3. The resolver according to claim 1 , wherein the ratio is set to a value not less than 0.2 and not more than 1.0.5. The resolver according to claim 1 , wherein the resolver has an axial double angle of 1.6. A motor comprising:a housing;{'claim-ref': ...

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.

CONTROLLING OPERATION OF A TECHNICAL SYSTEM

A system, a control unit, and a method for controlling operation of a technical system are provided. The technical system includes a plurality of sensors. The method includes receiving first sensor data from a first sensor of the plurality of sensors. The method includes detecting a first sensor anomaly based on failure of the first sensor to generate the first sensor data. The failure of the first sensor includes generation of anomalous first sensor data. The method also includes validating the first sensor anomaly based on a comparison between the first sensor data and a virtual first sensor data. Thereafter, a control command is generated to the technical system by replacing the virtual first sensor data in lieu of the first sensor data when the first sensor anomaly is validated. 1. A method for controlling operation of a technical system comprising a plurality of sensors , the method comprising:receiving first sensor data from a first sensor of the plurality of sensors;detecting a first sensor anomaly based on failure of the first sensor to generate the first sensor data, wherein failure of the first sensor comprises generation of anomalous first sensor data;validating the first sensor anomaly based on a comparison between the first sensor data and virtual first sensor data; andgenerating a control command to the technical system, the generating of the control command comprising replacing the virtual first sensor data in lieu of the first sensor data when the first sensor anomaly is validated.2. The method of claim 1 , further comprising:generating a system model of the technical system based on a multi-physics probability model, wherein the system model comprises virtual sensor data for each sensor of the plurality of sensors, and wherein the virtual sensor data comprises the virtual first sensor data;updating the system model with sensor data from the plurality of sensors to reflect a current state of the technical system; andeffecting change in the sensor ...

Rotation sensing apparatus

A rotation sensing apparatus includes a detected part, a sensor unit, and a rotation information calculation circuit. The sensor unit includes a first sensor disposed opposite to a first pattern portion, a second sensor disposed opposite to a second pattern portion, a third sensor disposed to be spaced apart from the first sensor in the rotation direction and opposite to the first pattern portion, and a fourth sensor disposed to be spaced apart from the second sensor in the rotation direction and opposite to the second pattern portion. The rotation information calculation circuit is configured to sense the rotation direction, in response to a differential signal, generated based on the first oscillation signal and the second oscillation signal, and an oscillation signal corresponding to maximum and minimum frequencies, from among the first oscillation signal, the second oscillation signal, the third oscillation signal, and the fourth oscillation signal.

METHOD FOR AUTOMATICALLY CALIBRATING A CAMSHAFT SENSOR IN ORDER TO CORRECT A GAP JUMP

A method for automatic calibration of a camshaft sensor for a motor vehicle. The sensor includes a processing module configured to generate, from a raw signal indicative of the variations in a magnetic field which are caused by the rotation of a toothed target and measured by a cell, an output signal indicative of the moments at which the teeth pass past the cell. The calibration method makes it possible, for each tooth, to determine a switching threshold not only as a function of a local minimum and of a local maximum for the tooth during the preceding revolution of the target, but also as a function of a corrective value calculated from a local maximum and/or a local minimum of the raw signal during the passage of a preceding tooth past the cell during a new revolution. 1. A method for automatic calibration of a camshaft sensor for a motor vehicle engine , [{'b': 1', '2', '3, 'a toothed target comprising at least two teeth (D, D, D),'}, 'a measurement cell configured to supply a raw signal indicative of variations in a magnetic field which are induced by a rotation (R) of the target, and', {'b': 1', '2', '3, 'a processing module configured to supply, from the raw signal, an output signal indicative of moments at which the teeth (D, D, D) of the target pass past the cell,'}], 'said sensor comprising{'sub': '1', 'claim-text': [{'sub': j,n', 'j, 'determining a local minimum (m) of the raw signal as a space preceding said tooth (D) passes past the cell,'}, {'sub': j,N', 'j, 'determining a local maximum (M) of the raw signal as said tooth (D) passes past the cell,'}, {'sub': j,N', 'j,N−1', 'j,N', 'j, 'calculating a switching threshold (S) for generating the output signal as a function of a local minimum (m) and of a local maximum (M) which are determined for said tooth (D) in a preceding revolution (N−1) of the target,'}], 'said method comprising, for each new revolution (N) of the target and for each tooth (D){'sub': j,N', 'k,N', 'k,N', 'k', 'k,N−1', 'k, 'wherein the ...

MAGNETIC POSITION DETECTION DEVICE AND MAGNETIC POSITION DETECTION METHOD

A magnetized scale () in which magnetic pole pairs each formed of a first magnetic portion () and a second magnetic portion () having different magnetic properties are arranged with a period of a magnetic pole pair width λ, and a magnetosensitive device () in which n magnetosensitive elements (to ) are arranged with a magnetosensitive element pitch P so that λ=nP may be established are arranged so as to be opposed to each other with a predetermined air gap therebetween. Output values output from the n magnetosensitive elements (to ) in parallel are analyzed to calculate a relative position between the magnetosensitive device () and the magnetized scale () as a position detection resolution of λ/n. 1. A magnetic position detection device , comprising:{'b': 2', '2, 'a magnetized scale in which magnetic pole pairs each having a width λ and each being formed of a first magnetic portion having a width λ and a second magnetic portion having the width λ, which have different magnetic properties, are arranged at equal pitches of a period of the magnetic pole pair width λ;'}a magnetosensitive device arranged so as to be opposed to the magnetized scale with a predetermined air gap therebetween, the magnetosensitive device being configured to move relatively in a direction of arrangement of the magnetized scale within a magnetic field formed by the magnetized scale while maintaining the air gap, and to measure a change of the magnetic field due to the relative movement with use of magnetosensitive elements; anda position calculation circuit configured to analyze an output value of the magnetosensitive device, to thereby calculate a relative position between the magnetosensitive device and the magnetized scale,wherein the magnetosensitive device comprises, as the magnetosensitive elements, a first magnetosensitive element group in which n first magnetosensitive elements, where n is a natural number of 2 or more, are arranged at equal magnetosensitive element pitches P so that ...

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 ...

POSITION MEASURING DEVICE AND METHOD FOR OPERATING A POSITION MEASURING DEVICE

A position measuring device includes: a first graduation carrier having a measuring graduation; a scanning unit, which is arranged so as to allow movement in a measuring direction relative to the measuring graduation in order to generate position-dependent scanning signals by scanning the measuring graduation; a signal processing unit for processing the scanning signals into positional signals; and a signal interface via which the positional signals are able to be output to subsequent electronics. At least one correction unit is provided in the signal processing unit by which at least one signal error of at least one scanning signal is able to be corrected. A monitoring unit is arranged to detect the reaching of a limit value of the signal error, and a correction unit triggering the event is able to be deactivated subsequently. 1. A position measuring device , comprising:a graduation carrier including a measuring graduation;a scanning unit, the graduation carrier and the scanning unit being movable in a measuring direction relative to each other, the scanning unit adapted to generate position-dependent scanning signals by scanning the measuring graduation;a signal processing unit adapted to process the scanning signals into positional signals;a signal interface adapted to output the positional signals to subsequent electronics;at least one correction unit provided in the signal processing unit adapted to correct at least one signal error of at least one scanning signal; anda monitoring unit adapted to detect the signal error reaching a first limit value and to subsequently deactivate a corresponding correction unit.2. The position measuring device according to claim 1 , wherein the monitoring unit is adapted to deactivate the corresponding correction unit by switching off the corresponding correction unit claim 1 , so that the scanning signal is output as the positional signal.3. The position measuring device according to claim 1 , wherein the monitoring unit is ...

Rotation Angle Detector and Torque Sensor

A rotation angle detector includes: a multipolar magnet ring magnetized multipolarly along a circumferential direction, at least one magnetic sensor group including three magnetic sensors being placed along the circumferential direction of the multipolar magnet ring, and outputting angle information in association with the rotation of the multipolar magnet ring, the respective pieces of the angle information having a phase difference therebetween of 120 degrees in an electrical angle, and an arithmetic unit configured to calculate a rotation angle of the multipolar magnet ring based on the angle information outputted from the three magnetic sensors included in the magnetic sensor group. 110.-. (canceled)11. A rotation angle detector comprising:a multipolar magnet ring magnetized multipolarly along a circumferential direction;at least one magnetic sensor group including N (N is a natural number of 3 or higher, except 4) magnetic sensors being placed along the circumferential direction of the multipolar magnet ring, and outputting angle information in association with the rotation of the multipolar magnet ring, the respective pieces of the angle information output from the N magnetic sensors having a phase difference therebetween of 360/N degrees in an electrical angle; andan arithmetic unit configured to calculate an average value of the angle information outputted from the N magnetic sensors included in the magnetic sensor group, and to calculate a rotation angle of the multipolar magnet ring based on the calculated average value, whereinthe arithmetic unit is configured to offset the phase difference of the angle information outputted from the N magnetic sensors included in the magnetic sensor group, to calculate a total value of the angle information after offsetting, and to obtain the average value by dividing the calculated total value by N.12. A rotation angle detector comprising:a multipolar magnet ring magnetized multipolarly along a circumferential direction ...

METHOD AND A SYSTEM FOR DETERMINING THE ANGULAR POSITION OF A ROTARY ELEMENT, AND A BEARING INCLUDING SUCH A SYSTEM

This method determines an angular position of a rotary element rotating with respect to a stationary element where a magnetic ring rotatably fastened with the rotary element is arranged with respect to a set of N regularly distributed sensors, with N≧3. Each sensor is suitable for issuing a unitary electric signal representative of a magnetic field generated by the magnetic ring. In this method, one computes a first sum of the signals issued by all N sensors and compares this sum to a first reference value. If the first sum equals the first reference value, one uses the signals of all N sensors to compute a signal representative of an instantaneous value of an angle representative of the angular position of the rotary element. If the first sum does not equal the first reference value, a series of defined steps to optionally obtain the instantaneous value are provided. 1154. A method for determining an angular position of a rotary element rotating with respect to a stationary element in a system where a magnetic ring rotatably fastened to the rotary element is arranged with respect to a set of N sensors (C-C) , with N larger than or equal to 3 , each sensor being suitable for issuing a unitary electric signal (U1(t)-U5(t)) representative of a magnetic field generated by the magnetic ring and the sensors being regularly distributed around a rotation axis (X) of the magnetic ring , wherein the method comprises the steps of:{'b': 1', '5, 'a) computing a sum (S(t)) of the signals (U1(t)-U5(t)) issued by all N sensors (C-C),'}{'b': '1', 'b) comparing the sum of step a) to a first reference value (R),'}c) if the sum of step a) equals the first reference value, using the signals of all N sensors to compute a signal (T(t)) representative of an instantaneous value of an angle (θ(t)) representative of the angular position of the rotary element,d) if the sum of step a) does not equal the first reference value, selecting a subset of P sensors amongst the N sensors, with P ...

GENERATING TIMING SIGNALS

The invention relates generating timing signals registering the passage of a component past a sensor. The invention relates particularly to the generation of timing signals in real time for health monitoring of a mechanical system, for example for detecting excessive distortion or vibration of rotor blades in a turbine. In a disclosed arrangement, a method is provided in which a the sensor is configured to output a signal that is dependent on a separation between a component and the sensor, and the method comprises: performing a first passage event integral of an output from the sensor over at least a portion of a first passage event of a reference component past the sensor; performing a second passage event integral of an output from the sensor over at least a portion of a second passage event of a component to be measured past the sensor, the second passage event occurring after the first passage event; and generating a timing signal when the second passage event integral is equal to a predetermined fraction of the first passage event integral. By integrating the signal, short noise pulses will not cause timing errors. Optionally, only a part of the received signal will be integrated, e.g. portions of the signal which are above the average value of the signal in a preceding period of time. 1. An apparatus for generating a timing signal for registering a passage of a component past a sensor , comprising:the sensor, wherein the sensor is configured to output a signal that is dependent on a separation between a component and the sensor; anda timing signal generation device, wherein the timing signal generation device is configured to:perform a first passage event integral, defined as an integral of an output from the sensor over at least a portion of a first passage event of a reference component past the sensor;perform a second passage event integral, defined as an integral of an output from the sensor over at least a portion of a second passage event of a component ...

SENSOR MAGNET AND MOTOR

An annular sensor magnet to be fixed to a motor shaft by a press-fit includes an annular portion having magnetic poles alternately formed in an outer peripheral portion. The annular sensor magnet also includes a fixing portion extending from an inner peripheral portion of the annular portion toward a center to support and fix the motor shaft having been press-fit, and a stress reducing portion for reducing stress caused in a contact portion of the fixing portion that contacts the motor shaft when the motor shaft is press-fit onto the fixing portion. The sensor magnet includes a bonded magnet in which a magnetic material is dispersed in a plastic material. 1. An annular sensor magnet to be fixed to a motor shaft by a press-fit , the sensor magnet comprising:an annular portion having magnetic poles alternately formed in an outer peripheral portion thereof;a fixing portion extending from an inner peripheral portion of the annular portion toward the center thereof to support and fix the motor shaft having been press-fit; anda stress reducing portion for reducing a stress caused in a contact portion of the fixing portion that contacts the motor shaft when the motor shaft is press-fit onto the fixing portion,wherein the sensor magnet comprises a bonded magnet in which a magnetic material is dispersed in a plastic material.2. The sensor magnet according to claim 1 , wherein the fixing portion includes a plurality of arms extending from the inner peripheral portion of the annular portion toward the center.3. The sensor magnet according to claim 2 , wherein the arms include a tip having disposed thereon the contact portion that contacts the motor shaft.4. The sensor magnet according to claim 2 , wherein the stress reducing portion comprises an arc area between fixed ends of the plurality of arms.5. The sensor magnet according to claim 4 , wherein the arc area includes a central portion with a radial thickness greater than a radial thickness of both end portions thereof.6. ...

Information processing system, information processing device, workpiece position identifying method, and workpiece position identifying program

An information processing system for identifying a position of a workpiece conveyed on a conveyor is provided. A counter measures a movement amount of a conveyor a plurality of times at intervals shorter than a cycle of communication with a controller, and transmits measured movement amounts and respective measurement timings to the controller. The controller receives a position of a workpiece measured from an image obtained by imaging the workpiece and an imaging timing, identifies measurement timings relatively close to the imaging timing from among measurement timings, and identifies a reference movement amount associated with the measurement timing, identifies a reference position of the workpiece at the imaging timing based on the position of the workpiece within the image, and adds a difference between the current movement amount of the conveyor and the reference movement amount to the reference position to calculate a current position of the workpiece.

Dynamometer control device

An input-side control device includes a first input signal generation unit for generating a first input signal on the basis of the deviation between an engine torque command signal and an input-side shaft torque detection signal; a second input signal generation unit for generating a second input signal on the basis of an input-side speed detection signal weighted according to a prescribed weighting signal; and a torque command signal generation unit for generating a torque command signal on the basis of the first and second input signals. If the value of a filtered signal obtained from the input-side speed detection signal is less than a prescribed threshold, the second input signal generation unit makes the value of the weighting signal lower than if the value of the filtered signal were greater than or equal to the threshold.

Ripple minimization by proper as/ts magnet arrangement in electric power assisted steering apparatus

A power steering apparatus assists steering of a vehicle by conferring torque generated by an electric motor to a steering mechanism. The apparatus includes a steering column with linked upper and lower steering shafts. An angle sensor (AS) includes a gear and magnet to measure the steering shaft angle. A torque sensor (TS) measures the relative shift angle between the upper and lower steering shaft and includes a multi-pole ring magnet and a magnetic flux conductor. The TS and AS are arranged such that the AS magnet influences the TS measurement creating a steering shaft angle depending error signal. The steering mechanism is arranged such that a zero crossing of an envelope curve of the error signal is given for the neutral position of the steering apparatus or a range of the steering position in which the steering angle is less than a threshold angle limit.

System and Method for Measuring Rotation Speed and Direction of Tappets (Lifters) of an Engine Valve Train

A method of measuring direction of rotation of a tappet of an engine valve train. Two opposing notches are machined or otherwise formed in the outer surface of the tappet. Two sensors proximate the outer surface of the tappet are operable to detect the change in distance resulting from the notches as the tappet rotates. There is a predetermined difference angle of separation between the arc distance between the notches and the arc distance between the sensors. Each sensor outputs a square wave output having pulses whose width represents detection of the notches by the sensor. The location of the pulses of the two square wave outputs is compared to determine direction of rotation of the tappet. 1. A method of measuring direction of rotation of a tappet of an engine valve train , comprising:providing two opposing notches in the outer surface of the tappet;providing two sensors proximate the outer surface of the tappet, operable to detect the change in distance resulting from the notches as the tappet rotates;wherein there is a predetermined difference angle of separation between the arc distance between the notches and the arc distance between the sensors;receiving a square wave output from each of the sensors, each square wave output having pulses whose width represents detection of the notches by the sensor; andcomparing the location of the pulses of the two square wave outputs to determine direction of rotation of the tappet.2. The method of claim 1 , wherein the sensors are eddy current sensors.3. The method of claim 1 , wherein the arc distance between the sensors is in a range of 150 to 170 degrees.4. The method of claim 1 , wherein the arc width of the notches is greater than the difference angle of separation.5. The method of claim 1 , further comprising determining the speed of rotation from either the distance between pulses or pulse width.6. The method of claim 1 , further comprising determining the rate of change of direction of rotation.7. The method of ...

COORDINATE MEASURING DEVICE COMPRISING AN OPTICAL SENSOR AND A CORRESPONDING METHOD

A coordinate measuring device () having at least one controlled axis (A X Y Z), a receptacle () rotationally drivable about an axis of rotation (A), an angle sensor (), and a measuring assembly (). The coordinate measuring device () moves the measuring assembly () relative to the gearwheel component () in a direction of the at least one controlled axis (A X Y Z). The measuring assembly () has an optical, contactlessly operating sensor () configured as a measuring sensor and arranged on the measuring assembly () to emit a light beam (LS) in the direction of the gearwheel component (). The angle sensor () supplies a rotational-angle-specific signal (sA) as a function of the rotational position of the receptacle () relative to the axis of rotation (A), and the measuring sensor is operable in an active state by the rotational-angle-specific signal (sA). 1. A coordinate measuring device comprising:at least one controlled axis defining an axis of rotation;a receptacle adapted to receive a gearwheel component to be measured, wherein the receptacle is rotationally drivable about the axis of rotation;an angle sensor; anda measuring assembly;wherein the coordinate measuring device is adapted to move the measuring assembly relative to the gearwheel component in a direction of the at least one controlled axis;the measuring assembly comprises an optical, contactlessly operating sensor configured as a measuring sensor and arranged on the measuring assembly to emit a light beam along an optical axis in a direction of an object plane of the gearwheel component when the gearwheel component is received by the receptacle;the angle sensor is adapted to supply a rotational-angle-specific signal based on a rotational position of the receptacle relative to the axis of rotation; andthe measuring sensor is activatable into an active state by the rotational-angle-specific signal.2. The coordinate measuring device according to claim 1 , wherein the active state includes an active measuring ...

PHASE INTERPOLATION CIRCUIT

Methods and systems are described for receiving a control step input at a binary-to-thermometer decoder and responsively generating bits of a thermometer codeword representative of the control step input, providing the bits of the thermometer codeword to a plurality of differential pairs comprising a first transistor and a second transistor, each differential pair configurable for one of directing current to an in-phase (I) common node or directing current to a quadrature phase (Q) common node and switching between directing current to the I common node and the Q common node, and forming an output signal based on current drawn through the I and Q common nodes, the output signal having an intermediate phase with respect to a first and a second reference signal. 1. An apparatus comprising:a binary-to-thermometer decoder configured to receive a control step input and to responsively generate a thermometer codeword representative of the control step input; a first subset of differential pairs having the first transistor connected to the I common node and the second transistor connected to the Q common node, each differential pair in the first subset configured to control the I and Q control signals; and', 'a second subset of differential pairs, the second subset of differential pairs comprising (i) differential pairs having the first transistor connected to the I common node and the second transistor disconnected from the Q common node to control only the I control signal and (ii) differential pairs having the first transistor disconnected from the I common node and the second transistor connected to the Q common node to control only the Q control signal; and, 'a plurality of differential pairs configured to generate in-phase (I) and quadrature phase (Q) control signals by drawing respective currents through I and Q common nodes, each differential pair comprising a first transistor and a second transistor connected to a corresponding current source of a plurality of ...

EMOJI COMMANDED ACTION

A system and method for receiving and executing emoji based commands in messaging applications. The system and method may include processes such as identifying emojis in a message, determining one or more action based on the emoji, and completing the determined actions. 1. (canceled)2. A system , comprisingone or more hardware processors; and receiving a message in a messaging application comprising a string of user inputs including at least one emoji, wherein the emoji is utilized to identify a corresponding emoji-based command to be executed on behalf of a sender of the message;', 'identifying the sender of the message;', 'generating a warning to be provided to an account associated with the identified sender of the message; and', 'causing, in response to receiving an indication for cancellation, termination of the emoji-based command to be executed on behalf of the sender of the message., 'a memory storing computer-executable instructions, that in response to execution by the one or more hardware processors, causes the system to perform operations comprising3. The system of claim 2 , wherein the utilizing the emoji to identify the corresponding emoji-based command comprises:parsing the received message to identify the emoji; anddetermining that the emoji is linked to the corresponding emoji-based command in a command table of a database.4. The system of claim 2 , wherein the emoji-based command includes a monetary transfer between the sender of the message and a recipient of the message.5. The system of claim 4 , wherein the warning is generated when the monetary transfer amount exceeds a threshold amount.6. The system of claim 2 , wherein a communication platform for the account associated with the identified sender of the message is different from the messaging application.7. The system of claim 6 , the indication for cancellation is received as a message sent via the communication platform for the account associated with the identified sender of the message.8. ...

MAGNETIC ANGULAR POSITION SENSOR

A magnetic angular position sensor system is described herein, which includes a shaft rotatable around a rotation axis, the shaft having a soft magnetic shaft end portion. The system further includes a sensor chip spaced apart from the shaft end portion in an axial direction and defining a sensor plane, which is substantially perpendicular to the rotation axis. At least four magnetic field sensor elements are integrated in the sensor chip, with two of the magnetic field sensor elements being spaced apart from each other and are sensitive to magnetic field components in a first direction and wherein two of the magnetic field sensor elements are spaced apart from each other and are only sensitive to magnetic field components in a second direction, whereby the first and the second direction are mutually non-parallel and the first and the second direction being perpendicular to the rotation axis. 1. A magnetic angular position sensor system , comprising:a shaft rotatable around a rotation axis, the shaft having a soft magnetic shaft end portion;a sensor chip spaced apart from the shaft end portion in an axial direction and defining a sensor plane, which is substantially perpendicular to the rotation axis;at least four magnetic field sensor elements integrated in the sensor chip, a first and a second magnetic field sensor element of the at least four magnetic field sensor elements being spaced apart from each other and sensitive to magnetic field components in a first direction, a third and a fourth magnetic field sensor element of the at least four magnetic field sensor elements being spaced apart from each other and sensitive to magnetic field components in a second direction, wherein the first and the second directions are mutually non-parallel and the first and the second directions are perpendicular to the rotation axis;a magnetic field source that magnetizes the shaft end portion, the shaft end portion being formed such that a magnetic field in the sensor plane, ...

MAGNETIC SENSOR FOR SYSTEM-LEVEL DIAGNOSTICS

A magnetic sensor may detect a system-level error, associated with a sensor system that includes the magnetic sensor, based on one or more physical parameters as determined at the magnetic sensor. The magnetic sensor may provide an indication of the system-level error in an output signal. The one or more physical parameters may include a temperature at the magnetic sensor, a temperature drift of the magnetic sensor, a supply voltage at the magnetic sensor, an amount of humidity at the magnetic sensor, or an amount of pressure at the magnetic sensor. 1. A magnetic sensor , comprising: detect a system-level error, associated with a sensor system that includes the magnetic sensor, based on one or more physical parameters as determined at the magnetic sensor; and', 'provide an indication of the system-level error in an output signal., 'one or more sensor components to2. The magnetic sensor of claim 1 , wherein the one or more physical parameters include a temperature at the magnetic sensor.3. The magnetic sensor of claim 1 , wherein the one or more physical parameters include a temperature drift of the magnetic sensor.4. The magnetic sensor of claim 1 , wherein the one or more physical parameters include a supply voltage at the magnetic sensor.5. The magnetic sensor of claim 1 , wherein the one or more physical parameters include an amount of humidity at the magnetic sensor.6. The magnetic sensor of claim 1 , wherein the one or more physical parameters include an amount of pressure at the magnetic sensor.7. The magnetic sensor of claim 1 , wherein the system-level error is detected based on determining that at least one physical parameter claim 1 , of the one or more physical parameters claim 1 , is greater than a maximum threshold associated with the at least one physical parameter.8. The magnetic sensor of claim 1 , wherein the system-level error is detected based on determining that at least one physical parameter claim 1 , of the one or more physical parameters ...

System for Judging Abnormal State

Provided is a highly reliable abnormal state determination system that can prevent erroneous determination even in a case where a determination condition for determining an abnormal state in measurement using a sensor cannot be changed. Provided is an abnormal state determination system including: an abnormal state determination unit configured to determine an abnormal state by using a detection signal based on a signal output from a sensor ; and a specific processing unit configured to, when a predetermined condition is satisfied, perform control processing for adjusting strength of the detection signal before the detection signal is input to the abnormal state determination unit 1. An abnormal state determination system , comprising:an abnormal state determination unit configured to determine an abnormal state by using a detection signal based on a signal output from a sensor; anda specific processing unit configured to, when a predetermined condition is satisfied, perform control processing for adjusting strength of the detection signal before the detection signal is input to the abnormal state determination unit.2. The abnormal state determination system according to claim 1 , whereina signal that periodically changes is output from the sensor, andwhen a value of the detection signal based on the signal that periodically changes exceeds a predetermined range, the specific processing unit performs the control processing for adjusting the strength of the detection signal.3. The abnormal state determination system according to claim 2 , whereinthe sensor is a magnetic sensor placed to have a predetermined space from a scale having a magnetic pattern, and the sensor outputs signals of a sine wave and a cosine wave due to relative movement between the sensor and the scale, andthe specific processing unit calculates a radius of a Lissajous circle formed by the sine wave and the cosine wave in the detection signal and, when the radius exceeds the predetermined range, ...

Inductive position determination

A device for inductive positioning comprises a coil, an element for influencing a magnetic field in the area of the coil, a signal generator for providing a digital signal and a delay element with an input and an output, wherein the delay element is designed on the basis of the coil and a delay period between a signal edge at the input and a corresponding signal edge at the output is dependent on the inductance of the coil. The device further comprises a comparator to provide a digital differential impulse, whose length is dependent on a time difference of corresponding signal edges at the input and the output of the delay element, an integrator to provide a voltage depending on the length of the differential impulse and an evaluator to determine the position of the coil in reference to the coil based the voltage.

ANGLE DETECTOR, AC-ROTATING-MACHINE CONTROLLER, AND ELECTRIC POWER STEERING APPARATUS

An angle detector including; a magnet being mounted on a rotation axle and that has a first track magnetized in P pole-pairs and second track magnetized in Q pole-pairs, a first hole device group that senses magnetic flux from the first track, a second hole device group that senses magnetic flux from the second track, a first detection unit that outputs an M-step absolute angular signal through division of one electric-angle rotation into M sections, a second detection unit that outputs an N-step relative angular signal through division of each of the M divided sections into N sections, an angle calculation unit that divides the one electric-angle rotation into [M×N] sections and calculates an [M×N]-step electric angular signal, based on the absolute angular signal and the relative angular signal, and an angle correction unit that outputs a correction angle supplemented so as to smooth the electric angular signal. 18-. (canceled)9. An angle detector that can detect , as one electric-angle rotation corresponding to a one-period electric angle , a mechanical-angle range of one section out of sections obtained by dividing one mechanical-angle rotation corresponding to one rotation of a rotation axle into P sections (P is a natural number) , the angle detector comprising:a magnet that is fixed on the rotation axle and has a first track including magnets magnetized in P pole-pairs and a second track including magnets magnetized in Q pole-pairs (Q is a positive even number the same as or larger than 2P);a first hole device group that is disposed so as to face the magnet and that senses magnetic flux from the first track and then outputs a first hole signal;a second hole device group that is disposed so as to face the magnet and that senses magnetic flux from the second track and then outputs a second hole signal;a first detector that outputs an M-step absolute angular signal corresponding to M angle sections obtained by dividing the one electric-angle rotation into M ...

Encoder and data transmission method

An encoder that receives, from a control device, a request signal for requesting position data and transmits a response signal including the position data to the control device by serial communication, at a predetermined communication cycle, includes: a response signal generating unit configured to generate a response signal including the position data and associated data associated with the position data; and a transmitting unit configured to transmit the generated response signal. The transmitting unit is configured to transmit the associated data prior to transmission of the position data when transmitting the response signal.

CAGE POSITION DETECTION DEVICE

Provided is an apparatus configured to detect a car position by performing threshold processing on a voltage caused by an AC magnetic response through use of an identification plate in which a slit pattern is formed and a plurality of coils, the apparatus including a circuit configuration capable of switching between a normal operation for detecting the car position based on an on/off detection operation using the plurality of coils and a self-diagnosis operation capable of verifying the on/off detection operation irrespective of the presence or absence of the identification plate with a car in a stopped state by forcedly applying a magnetic field to the coils. 1. A car position detector , which is configured to detect a stop position when a car of an elevator is stopped on each landing floor , the car position detector comprising:an identification plate, which is to be provided in a hoistway on each landing floor, and is configured as a metal plate having a slit pattern formed of a plurality of slits in an ascending/descending direction of the car;a sensor, which is to be provided on a car side, and includes a plurality of coils formed of N coils each being configured to output a voltage value due to an AC magnetic response by being opposed to a part of the slit pattern and generate an output value corresponding to a part of the slit pattern of the identification plate, the plurality of coils each being formed of an exciting coil and a differential type detection coil, the sensor being configured to output voltage values obtained through detection by the differential type detection coils;a signal processor configured to perform threshold processing on the output values obtained from the respective differential type detection coils to generate detection coil output; anda test coil configured to be supplied with an exciting current flowing through the exciting coil, to thereby apply a magnetic field corresponding to an amplitude of the exciting current to the ...

METHOD OF DETERMINING SUB-DIVISIONAL ERROR

A method of determining the sub-divisional error of an encoder apparatus that is configured to measure the position of relatively moveable parts of an apparatus on which an inspection device for inspecting an artefact is mounted. The method includes causing the inspection device to obtain measurements which includes relatively moving the relatively moveable parts of the apparatus, and using the measurements to determine the encoder apparatus' sub-divisional error. 1. A method of determining the sub-divisional error of an encoder apparatus that is configured to measure the position of relatively moveable parts of an apparatus on which an inspection device is mounted , the method comprising:causing the inspection device to inspect a feature which comprises relatively moving the relatively moveable parts of the apparatus; andusing measurements obtained during inspection of the feature to determine the encoder apparatus' sub-divisional error.2. A method as claimed in claim 1 , further comprising determining at least one error map for correcting for the encoder apparatus' sub-divisional error.3. A method as claimed in claim 2 , in which the at least one error map comprises a look-up table or function.4. A method as claimed in claim 2 , in which the error map describes the form of the sub-divisional error claim 2 , and in which the description varies along the encoder apparatus' measurement range.5. A method as claimed in claim 1 , comprising determining the encoder apparatus' sub-divisional error based on properties of a periodic variation in the measurements at at least one predetermined spatial frequency.6. A method as claimed in claim 5 , in which the properties comprise the amplitude and phase offset of the variations at the at least one predetermined spatial frequency.7. A method as claimed in in which the at least one predetermined spatial frequency corresponds to the encoder apparatus' scale or signal period claim 5 , and optionally harmonics thereof.8. A method ...

METHOD FOR MEASURING THE ROTATION SPEED OF A VEHICLE WHEEL

A method for measuring the rotation speed of a wheel including the steps of: acquiring an analogue measurement signal (Sma) generated by a magnetic tachometer and containing a useful signal the frequency of which is representative of the rotation speed of the wheel; digitizing in real-time the analogue measurement signal (Sma) in order to obtain a time-dependent digital measurement signal (Smnt); calculating a Fourier transform of the time-dependent digital measurement signal (Smnt) in order to obtain a frequency-dependent digital measurement signal (Smnf); and carrying out a frequency analysis in order to identify by a search for peaks a useful spectral line () so as to obtain the frequency of the useful signal and therefore the rotation speed of the wheel. 1. A method for measuring the rotation speed of a vehicle wheel including the steps of:acquiring an analogue measurement signal (Sma) generated by a magnetic tachometer and containing a useful signal the frequency of which is representative of the rotation speed of the wheel;digitizing in real-time the analogue measurement signal (Sma) in order to obtain a time-dependent digital measurement signal (Smnt);calculating a Fourier transform of the time-dependent digital measurement signal (Smnt) in an observation window in order to obtain a frequency-dependent digital measurement signal (Smnf); and{'b': 15', '16, 'carrying out a frequency analysis on the frequency-dependent digital measurement signal so as to identify by a search for peaks a useful spectral line (; ) and to determine the frequency of the useful spectral line in order to obtain the frequency of the useful signal and therefore the rotation speed of the wheel.'}2. The method according to claim 1 , wherein the frequency analysis includes implementing adaptive filtering.315161516. The method according to claim 2 , wherein the adaptive filtering consists in adapting the position of a spectral analysis window (Fas) in which the useful spectral line (; ) is ...

APPARATUS AND METHOD FOR COMPENSATING FOR POSITION ERROR OF RESOLVER

An apparatus for compensating for a position error of a resolver has a controller which is configured to: receive position information of a rotor of a motor, which is detected by the resolver, to measure a first position error, convert the first position error to a second position error at an electrical angular velocity of 0, and to store the second position error; receive a current electrical angular velocity and the second position error, convert the second position error to a third position error at the current electrical angular velocity, and compensate for the third position error; and perform determination of false position error compensation when a magnitude of a ripple at an electrical angular velocity, which is measured after the third position error has been compensated for, is equal to or greater than a reference magnitude. 1. An apparatus for compensating for a position error of a resolver , the apparatus comprising a controller which is configured to:receive position information of a rotor of a motor, which is detected by the resolver, to measure a first position error, convert the first position error to a second position error at an electrical angular velocity of 0, and to store the second position error;receive a current electrical angular velocity and the second position error, convert the second position error to a third position error at the current electrical angular velocity, and compensate for the third position error; andperform determination of false position error compensation when a magnitude of a ripple at an electrical angular velocity, which is measured after the third position error has been compensated for, is equal to or greater than a reference magnitude.2. The apparatus of claim 1 , wherein the controller is further configured to:receive the position information of the rotor of the motor, which is detected by the resolver, to measure a fourth position error;determine an electrical angular velocity of the fourth position error; ...

Sensor Ring

A sensor ring is provided for a magnetic measuring transducer of an ABS system consisting of at least two annularly arranged functional elements. The first functional element is formed as a ferromagnetic annular disc element with a flat upper side and a flat underside with a multiplicity of openings. The second functional element, as a non-ferromagnetic element, has either been applied on the upper side and/or the underside of the annular disc element and/or has been introduced into the openings, as an annular disc element. The sensor ring is protected from contamination or damage by the non-ferromagnetic covering. The covering may also be produced by encapsulation or filling, wherein the openings in the sensor ring can be filled with plastic and also the side faces can be coated with plastic.

MOTOR DRIVE CONTROL DEVICE, ELECTRIC POWER STEERING DEVICE, AND VEHICLE

To provide a motor drive control device, an electric power steering device, and a vehicle which can individually diagnose abnormalities of magnetic detection elements, designed in a multisystem configuration to include at least two systems, for each system. A motor drive control device includes two systems of first and second rotation information detection function units. The first and second rotation information detection function units include first and second rotation position information detection units and first and second rotation information detection units. The first and second rotation information detection units individually diagnose their own abnormalities based on first and second motor rotation position signals detected by the first and second rotation position information detection units. 1. A motor drive control device comprising:an annular or disk-shaped magnet placed on a motor rotating shaft of an electric motor to be rotatable in synchronism with the motor rotating shaft and includes at least two different magnetic poles arranged alternately in a circumferential direction;at least two systems of rotation information detection function units each including a rotation position information detection unit configured to detect a magnetic flux of the magnet which changes depending on a rotation position of the motor rotating shaft as rotation position information, a motor rotation angle calculation unit configured to calculate a motor rotation angle based on the rotation position information detected by the rotation position information detection unit, a rotation position information diagnosis unit configured to diagnose an abnormality of the rotation position information detected by the rotation position information detection unit, and a rotation change amount measurement unit configured to measure an amount of change in the rotation position of the electric motor; anda motor drive control unit configured to control driving of the electric motor based ...