ELECTROMAGNETIC INDUCTION POSITION DETECTION SENSOR

An electromagnetic induction position detection sensor includes a plurality of loop coils, each being an N-turn loop coil formed by winding a conductor N times (N is an integer equal to or greater than 2), and each coil turn having long side portions that are separated by a predetermined width and that are parallel to each other. The loop coils are arranged at predetermined intervals in a predetermined direction intersecting the long side portions of the loop coils. The width of at least one of the N turns of the Mth loop coil from the edge portion of the sensor in the predetermined direction (M is an integer equal to or greater than 2) is larger than the predetermined width, with the long side portion of this turn of the Mth loop coil arranged more outward than the long side portions of the other turns of the Mth loop coil. 1. An electromagnetic induction position detection sensor comprising:a plurality of loop coils, each of which is an N-turn loop coil formed by winding a conductor N times, wherein N is an integer equal to or greater than 2, and each coil turn having long side portions that are separated by a predetermined width and that are parallel to each other, the loop coils being arranged at predetermined intervals in a predetermined direction intersecting the long side portions of the loop coils, whereina width of at least one of the N turns of the Mth loop coil from an edge portion of the sensor in the predetermined direction, wherein M is an integer equal to or greater than 2, is larger than said predetermined width, with the long side portion of said turn of the Mth loop coil arranged more outward than the long side portions of the other turns of the Mth loop coil.2. The position detection sensor of claim 1 , whereinthe width of at least one of the N turns of the Mth loop coil from the edge portion of the sensor in the predetermined direction is larger than said predetermined width, with the long side portion of said turn of the Mth loop coil toward the ...

ASSEMBLY COMPRISING AT LEAST A FIRST MOTOR, A SECOND MOTOR AND AN ANGULAR POSITION SENSOR

An assembly includes at least a first motor () and a second motor () on which first targets () and second targets () being respectively mounted, the first targets () and the second targets () are respectively distributed angularly over the first motor () and over the second motor (), each first target () having a first angular aperture, each second target () having a second angular aperture, the assembly furthermore having an angular position sensor () positioned between the motors () and adapted to measure the angular position of the targets (). 110201323132310201213231312325102013235. An assembly comprising at least a first motor () and a second motor () on which identical first targets () and identical second targets () being respectively mounted , the first targets () and the second targets () are respectively distributed angularly over the first motor () and over the second motor () , respectively with a first angular spacing (β) and a second angular spacing (β) between two consecutive first targets () and two consecutive second targets () , each first target () having a first angular aperture (λ) , each second target () having a second angular aperture (λ) , the assembly furthermore having an angular position sensor () positioned between said motors ( , ) and adapted to measure the angular position of said targets ( , ) , said angular position sensor () comprising:{'b': 50', '13', '23, 'a printed circuit board () defining a detection window (F) of said first targets () and of said second targets (),'}{'b': 1', '1', '1', '13', '2', '2', '2', '23', '1', '1', '2', '2, 'at least a first set () of receiver windings (S, C) for detecting said first targets () and a second set () of receiver windings (S, C) for detecting said second targets () in said detection window (F), said receiver windings (S, C, S, C) extending angularly,'}{'b': 1', '2', '1', '2', '13', '23', '1', '2', '13', '23, 'each set of receiver windings (, ) having a sine receiver winding (S, S) adapted ...

INDUCTIVE POSITION SENSOR WITH INTEGRATED FAULT DETECTION

An integrated circuit is provided for use in a sensor system having a plurality of sensing coils arranged in a star configuration coupled to terminals of an integrated circuit, such that a first and a second terminal are connected external to the integrated circuit via a loop including a first and a second sensing coil in the plurality of sensing coils. The integrated circuit includes: sensing circuitry for evaluation of sense signals received from the sensing coils via said terminals; a current source and a current sink coupled to respectively a first and a second of said terminals, such that upon supply of current from the current source a current is established through the loop external to the integrated circuit and a detection signal is generated; and an evaluator for evaluating one of more detection signals to detect failure and/or weakness within said loop. 1. A sensor system comprising a plurality of sensing coils arranged in a star configuration on a first side of each sensing coil , each of the sensing coils having a second side coupled to terminals of an integrated circuit , such that a first and a second terminal are connected external to the integrated circuit via a loop including a first and a second sensing coil in the plurality of sensing coils , the integrated circuit including:sensing circuitry for evaluation of sense signals received from the sensing coils via said terminals;a current source and a current sink coupled to respectively a first and a second of said terminals, such that upon supply of current from the current source a current is established through the loop external to the integrated circuit and a detection signal is generated;an evaluator for evaluating one of more detection signals to detect failure and/or weakness within said loop.2. The sensor system as claimed in claim 1 , wherein the current source and the current sink are each coupled to said first and second terminal respectively.3. The sensor system as claimed in claim 1 , ...

STEERING WHEEL ANGLE SENSOR AND METHOD FOR FAULT DETECTING OF A STEERING WHEEL ANGLE SENSOR

A steering wheel angle sensor is described comprising a first part and a second part, wherein the first part and the second part are moveable relative to each other in rotational direction and the first part comprises at least one first signal generating means () generating a sine signal (x, x) in response to an angular position of the second part and at least one second signal generating means () generating a cosine signal (y, y) in response to the angular position of the second part. Such a steering wheel angle sensor should allow a simple fault detection. To this end fault detecting means () are provided, wherein the fault detecting means () form a sum of the square of the sine signal (x, x) and the square of the cosine signal (y, y) and generates a fault signal, if the sum is not within a predetermined range. 1. A steering wheel angle sensor comprising a first part and a second part , wherein the first part and the second part are movable relative to each other in rotational direction and the first part comprises at least one first signal generating means generating a sine signal (x , x) in response to an angular position of the second part and at least one second signal generating means generating a cosine signal (y , y) in response to the angular position of the second part , wherein fault detecting means are provided , wherein the fault detecting means form a sum of the square of the sine signal (x , x) and the square of the cosine signal (y , y) and generates a fault signal , if the sum is not within a predetermined range.2. The sensor according to claim 1 , wherein at least two first signal generating means and at least two second signal generating means are provided claim 1 , the first signal generating means producing at least a first sine signal (x) and a second sine signal (x) and the second signal generating means producing at least a first cosine signal (y) and a second cosine signal (y) claim 1 , and the fault detecting means form a first sum of the ...

METHOD FOR PROCESSING A MEASURED-VALUE SIGNAL DETERMINED IN AN ANALOG MANNER, A RESOLVER SYSTEM FOR IMPLEMENTING THE METHOD AND A METHOD FOR DETERMINING AN OUTPUT CURRENT OF A CONVERTER

In method for processing a measured-value signal determined in an analog manner and a resolver system for implementing the method, the measured-value signal being supplied to a delta-sigma modulator, which makes a bit stream, particularly a one-bit data stream, available on the output side, in particular, whose moving average corresponds to the measured-value signal, the bit stream being supplied to a first digital filter, which converts the bit stream into a stream of digital intermediate words, that is a multibit data stream, the first digital filter having three serially arranged differentiators, the bit stream being clocked at a clock frequency f, that is, at a clock-pulse period T=1/f, and therefore the stream of digital intermediate words being clocked, and thus updated, at a clock-pulse frequency f, that is, at a clock-pulse period T=1/f, the output signal of the first digital filter being supplied to a second digital filter, the second digital filter having as its output data-word stream the difference between a first and a second result data-word stream, the first and second result data-word stream being determined around a first and second time interval from the intermediate data-word stream, the first and second time interval being situated at a distance in time T, the first result data-word stream being determined as a time-discrete second derivation with time scale TD and the second result data-word stream being determined as a time-discrete second derivation with time scale TD. 1. A method for processing a measured-value signal detected by a sensor and determined in an analog manner , comprising:supplying the measured-value signal to a delta-sigma modulator;outputting a bit stream by the delta-sigma modulator;supplying the bit stream to a first digital filter;converting the bit stream, by the first digital filter, into an intermediate data-word stream of digital intermediate words, the bit stream being clocked and the stream of digital intermediate ...

DEVICE FOR MEASURING A MEASUREMENT VARIABLE

An apparatus for measuring a measured variable, wherein a first inductance and at least one measurement inductance are coupled, and wherein dithering is used to increase accuracy. 1. An apparatus for measuring a measured variable , comprising:a first inductance,at least one measurement inductance to sense the measured variable and coupled to the first inductance,a capacitance interconnected with the first inductance to form a parallel resonant circuit, andan electronic control unit,wherein the electronic control unit is connected directly to the parallel resonant circuit and is configured to excite the parallel resonant circuit into oscillation at an excitation frequency that is derived from a clock of the electronic control unit,wherein the electronic control unit has at least one analog-to-digital converter having a signal input connected directly to the at least one measurement inductance for picking up a signal,wherein the electronic control unit has a distortion signal generator having a distortion signal output, the distortion signal generator delivering a distortion signal at a distortion signal reference point,wherein the distortion signal output is coupled to the analog-to-digital converter exclusively by passive components,wherein the electronic control unit is configured to measure the signal at intervals, a number of measured values being picked up within each interval, andwherein the electronic control unit is configured to perform a frequency analysis of the measured values of a respective interval and to determine at least one characteristic value, indicating the measured variable, of the signal at an evaluation frequency.2. The apparatus as claimed in claim 1 ,wherein the measured values are spaced apart by respective time differences, these being consistent with an undersampling of the signal.3. The apparatus as claimed in claim 1 ,wherein the evaluation frequency is the excitation frequency.4. The apparatus as claimed in claim 1 ,wherein the ...

Systems and methods for correcting non-sinusoidal signals generated from non-circular couplers

A system including a non-circular coupler, a sensor, a memory module, and a processor module is provided. The sensor includes a transmitter coil adapted to be energized by a high frequency current source and at least two receiving coils. One of the receiver coils generate a sine-like function output signal and the other generates a cosine-like function output signal upon rotation of the coupler. The memory module is operable to compensate for non-sinusoidal output signals caused by a plurality of geometric errors and a gap between the coupler and the at least two receiving coils. The processor module configured to process the non-sinusoidal output signals from both the first and second receiver coils, determine an error in the non-sinusoidal output signals from both the first and second receiver coils, mathematically compensate the assembly to eliminate the error and generates an output signal representative of the rotational position of the coupler. 1. A sensor system comprising:a coupler;a sensor spaced apart from the coupler to form a gap, the sensor comprising a transmitter coil adapted to be energized by a high frequency current source and at least two receiving coils generating a non-sinusoidal output signals, one of the receiver coils generates a sine-like function upon rotation of the coupler and the other of the receiver coils generates a cosine-like function upon rotation of the coupler;a memory module operable to compensate for the non-sinusoidal output signal caused by a plurality of geometric errors and the gap between the coupler and the at least two receiving coils; compute an arctangent of the output signals from the first and second receiver coils;', 'correct at least one error of the plurality of geometric errors from an electrical angle of the arctangent;', 'apply a scaling factor at different operating points of the gap;', 'calculate a slope and an offset parameters that when added equal a value for each of the scaling factors at the different ...

DEVICES, SYSTEMS AND METHODS FOR DETERMINING AND COMPENSATING FOR OFFSET ERRORS ARISING IN INDUCTIVE SENSORS

Devices, systems, and method for detecting, determining and compensating for offset error arising in inductive position and torque sensors are described. In accordance with at least one embodiment, an offset coil can be configured for use within an inductive sensor and include a first trace and at least one second trace. The first trace and the at least one second trace may be drawn within a stator of an inductive sensor. The first trace and the at least one second trace may be drawn within the stator proximate to a pair of excitation coil connecting leads, drawn on a first plane within the stator, and on at least one plane substantially parallel to the first plane such that wherein an excitation coil flowing through the pair of excitation coil connecting leads induces an offset coil signal in the first trace and at least second trace. 1. An inductive sensor , comprising:a rotor; and an excitation coil electrically connected to an integrated circuit by excitation coil connecting leads;', 'a first receiver coil electrically connected to the integrated circuit by a first set of receiving coil connecting leads;', 'a second receiver coil electrically connected to the integrated circuit by a second set of receiving coil connecting leads; and', 'an offset coil pattern forming an offset coil electrically connected to the integrated circuit;, 'a stator comprising a first inductive coupling arises between the rotor and the excitation coil;', 'a second inductive coupling arises between the rotor and the first receiver coil;', 'a third inductive coupling arises between the rotor and the second receiver coil;', a first direct coupling arises between the first set of receiving coil connecting leads and the excitation coil;', 'a second direct coupling arises between the second set of receiving coil connecting leads and the excitation coil; and', 'an offset coupling arises between the offset coil pattern and the excitation coil connecting leads., 'wherein and within the asymmetric ...

Sensor Device For Measuring The Rotational Position Of An Element

A sensor device for measuring a rotational position of an element that is rotatable about an axis of rotation includes a pair of sensing elements. The sensing elements are shifted with respect to each other by at least 120 degrees about the axis of rotation. 1. A sensor device for measuring a rotational position of an element that is rotatable about an axis of rotation , comprising:a pair of sensing elements shifted with respect to each other by at least 120 degrees about the axis of rotation.2. The sensor device of claim 1 , wherein the sensing elements are each an electromagnetic sensing element.3. The sensor device of claim 2 , wherein the electromagnetic sensing element is an electromagnetic transducer.4. The sensor device of claim 3 , wherein the transducer has a sender member emitting a magnetic field and a pair of receiving members receiving the magnetic field.5. The sensor device of claim 1 , further comprising an arcuate carrier with an opening receiving the element perpendicular to the axis of rotation.6. The sensor device of claim 5 , wherein each of the sensing elements is arranged closer to an end of the arcuate carrier than to a central part of the arcuate carrier.7. The sensor device of claim 5 , wherein the arcuate carrier extends more than 180 degrees around the axis of rotation.8. The sensor device of claim 1 , wherein the sensing elements are arranged opposite to each other relative to the axis of rotation.9. The sensor device of claim 4 , wherein the sender members are connected to each other.10. The sensor device of claim 4 , wherein one of the receiving members of one of the pair of sensing elements is connected to one of the receiving members of the other of the pair of sensing elements.11. The sensor device of claim 4 , wherein the transducers are identical and each have a first receiving member and a second receiving member claim 4 , the first receiving member of one of the transducers is coupled with the second receiving member of the other ...

METHOD AND DEVICE FOR PROCESSING A SIGNAL

The present invention relates to the signal processing of signals with the simultaneous conversion of the operating time grid. To this end, a signal is detected or provided in a first time grid. After the difference quotient is calculated in the first time grid, the difference quotient is output in a second time grid in which the signal, in particular the difference quotient, is further processed. 1. A device for processing a signal , the device comprising:a detecting device, which is designed to detect a signal with a first sampling rate in a first time grid;a differentiating device, which is designed to differentiate the detected signal in the first time grid and output it in a second time grid; anda processing device, which is designed to process the differentiated signal in the second time grid,the time intervals in the first time grid being smaller than the time intervals in the second time grid.21. The device as claimed in claim 1 , the processing device comprising a PT element.3. The device as claimed in claim 1 , the differentiating device being designed to subtract a value of a signal detected by the detecting device from a value that has previously been detected by the detecting device claim 1 , and to divide the differences by the time interval of the two detected signals.4. The device as claimed in claim 1 , the differentiating device being designed to output the differentiated signal in the second time grid to the processing device.5. The device as claimed in claim 1 , the first sampling rate in the first time grid being variable.6. A drive system claim 1 , comprising:an electrical machine, which is coupled to a drive shaft;a rotational angle sensor, which is coupled to the drive shaft and is designed to provide a signal corresponding to the angular position of the drive shaft; and a detecting device, which is designed to detect a signal with a first sampling rate in a first time grid;', 'a differentiating device, which is designed to differentiate the ...

REDUNDANT ANGULAR POSITION SENSOR AND ASSOCIATED METHOD OF USE

A redundant angular position sensor comprising a first angular position sensor including a first excitation coil, a first sensing coil and a second sensing coil and a second angular position sensor. The second angular position sensor including a second excitation coil, a third sensing coil and a fourth sensing coil. Each of the first, second, third and fourth sensing coils comprising a respective clockwise winding portion and a respective counter-clockwise winding portion. The redundant angular position sensor further comprises a rotatable inductive coupling element positioned in overlying relation to the sensing coils and separated from the sensing coils by a gap, wherein the rotatable inductive coupling element comprises four, substantially evenly radially spaced, sector apertures.

RESOLVER-TO-DIGITAL CONVERTER

According to one aspect, a resolver-to-digital converter includes a first filter configured to receive a first delta-sigma modulated resolver input. A second filter is configured to receive a second delta-sigma modulated resolver input. A summing junction is configured to output a difference between a scaled output of the first filter and a scaled output of the second filter. A controller is configured to generate a controller output based on a product of a demodulator and an output of the summing junction. An integrator is configured to generate an estimated position based on the controller output. The resolver-to-digital converter also includes a compensator configured to generate a compensated estimated position based on the controller output and a compensation offset delay adjustment. 1. A resolver-to-digital converter comprising:a first filter configured to receive a first delta-sigma modulated resolver input;a second filter configured to receive a second delta-sigma modulated resolver input;a summing junction configured to output a difference between a scaled output of the first filter and a scaled output of the second filter;a controller configured to generate a controller output based on a product of a demodulator and an output of the summing junction;an integrator configured to generate an estimated position based on the controller output; anda compensator configured to generate a compensated estimated position based on the controller output and a compensation offset delay adjustment.2. The resolver-to-digital converter of claim 1 , wherein the compensator is further configured to add the estimated position to a product of the compensation offset delay adjustment and the controller output to generate the compensated estimated position.3. The resolver-to-digital converter of claim 1 , wherein the compensated estimated position is an estimated motor shaft position of a motor shaft in a motor control system.4. The resolver-to-digital converter of claim 1 , ...

Rotational Angle Sensor

A rotational angle sensor includes a stator element and rotor element. The stator element has a stator transmitting coil, circuit board, and at least two identically configured stator receiving coils angularly offset from each other on the circuit board. The rotor element is mounted rotatably about a rotation axis relative to the stator element, and has a rotor receiving coil and rotor transmitting coil electrically connected to each other. The rotor receiving coil is inductively coupled to the stator transmitting coil such that an electromagnetic field produced by the stator transmitting coil induces a current in the rotor receiving coil that flows through the rotor transmitting coil and causes the rotor transmitting coil produces a further electromagnetic field. The stator receiving coils are inductively coupled to the rotor transmitting coil in a manner configured with reference to a rotational angle between the stator element and the rotor element so that the further electromagnetic field induces at least two angle-dependent alternating voltages in the stator receiving coils. Each stator receiving coil is formed from a plurality of radial conductors and circumferential conductors that are arranged in two levels of the circuit board such that, for each stator receiving coil, at least two oppositely directed partial windings are formed from the radial conductors circumferential conductors. The radial conductors extend radially from an inner end to an outer end and are arranged on the circuit board in sets of two at least partially overlapping conductors with opposite current directions. Each circumferential conductor extends circumferentially, connects two inner ends or two outer ends of respective radial conductors, and has a via providing a change between the levels of the circuit board. 1. A rotational angle sensor , comprising: a stator transmitting coil;', 'a printed circuit board having two planes; and', each of the at least two stator receiving coils is ...

RESOLVER CORRECTION DEVICE AND METHOD OF CORRECTING THE SAME

To provide a correction method of resolver correction device and resolver correction device that can reduce rotation angle (the rotation speed) detection error caused by resolver. An excitation signal supply circuit supplies an excitation signal of an excitation frequency to the resolver during a normal operation, for supplying the excitation signals of a plurality of frequencies including the excitation frequency to the first phase shifter or the second phase shifter during a calibration operation. A shift amount searching circuit searches the first shift amount setting value for each frequency of the excitation signal such that the first shift amount becomes 45 degrees, and the second shift amount setting value for each frequency of the excitation signal such that the second shift amount becomes 135 degrees, while referring to the detection result of the phase difference detection circuit during the calibration operation, and stores in the correction table. 1. A resolver correction device comprising:a first phase shifter for outputting a first phase signal by shifting a phase of a first detection signal is one of quadrature detection signals of the resolver by a first shift amount in accordance with a first shift amount setting value;a second phase shifter for outputting a second phase signal by shifting a phase of a second detection signal is the other of the quadrature detection signals by a second shift amount in accordance with a second shift amount setting value;an add circuit for outputting a third phase signal by adding the first phase signal and the second phase signal;an excitation signal supply circuit for supplying an excitation signal of an excitation frequency to the resolver during a normal operation, for supplying the excitation signals of a plurality of frequencies including the excitation frequency to the first phase shifter or the second phase shifter during a calibration operation;a phase difference detection circuit detecting a rotation angle ...

TIME CAPTURE BASED RESOLVER TO DIGITAL CONVERTER

A resolver to digital converter system comprises a resolver and a controller. The resolver has a reference winding attached to a rotor, and first and second output windings attached to a stator and coupled to the reference winding. The reference winding is configured to be driven with a reference AC signal having a known frequency and induces first and second output signals from the first and second output windings in response to the reference AC signal. The controller circuit is configured to compare the first and second output signals to first and second linear signals respectively, ascertain first and second time intervals between first and second determined start time points and first and second stop time points where magnitudes of the first and second output signals are substantially equal to magnitudes of the first and second linear signals, respectfully. The controller circuit is further configured to calculate a rotating angle of the resolver based on the first and second time intervals. 1. A resolver to digital converter system , comprising:a resolver comprising a reference winding attached to a rotor, and first and second output windings attached to a stator and coupled to the reference winding, wherein the reference winding is configured to be driven with a reference AC signal having a known frequency and induce first and second output signals from the first and second output windings, respectively, in response to the reference AC signal; anda controller circuit configured to compare the first and second output signals to first and second linear signals, respectively, ascertain first and second time intervals between first and second determined start time points and first and second stop time points, respectively, where magnitudes of the first and second output signals are substantially equal to magnitudes of the first and second linear signals, respectively; wherein the controller circuit is further configured to calculate a rotating angle of the ...

ELECTROMAGNETIC INDUCTION TYPE ENCODER

An electromagnetic induction type encoder, wherein a detection head has a transmitter coil configured to generate magnetic flux, wherein a scale has a plurality of connection coils arrayed in a measurement axis direction, are configured to be electromagnetically coupled with magnetic flux generated by the transmitter coil and generate magnetic flux that fluctuates in a predetermined spatial period in the measurement axis direction, wherein the detection head has a receiver coil having a plurality of coils arrayed in the measurement axis direction on a predetermined face of the detection head and are configured to be electromagnetically coupled with the magnetic flux generated by the plurality of connection coils and detect a phase of the magnetic flux, wherein a current direction of one of the plurality of coils is opposite to a current direction of another coil of the plurality of coils next to each other. 1. An electromagnetic induction type encoder comprising:a detection head that has a rectangular shape; anda scale that has a rectangular shape,wherein the detection head faces with the scale and is configured to relatively move with respect to the scale in a measurement axis direction,wherein the detection head has a transmitter coil configured to generate magnetic flux,wherein the scale has a plurality of connection coils that are arrayed in the measurement axis direction, are configured to be electromagnetically coupled with the magnetic flux generated by the transmitter coil and generate magnetic flux that fluctuates in a predetermined spatial period in the measurement axis direction,wherein the detection head has a receiver coil having a plurality of coils that are arrayed in the measurement axis direction on a predetermined face of the detection head and are configured to be electromagnetically coupled with the magnetic flux generated by the plurality of connection coils and detect a phase of the magnetic flux,wherein the plurality of coils are formed so ...

Method for Processing a Measured-Value Signal Representing a Value Determined in Analog Form for the Output Current of a Converter and Device for Carrying Out the Method

A method for processing a measured-value signal representing a value, determined in analog form, for the output current of a converter, and device for carrying out the method, the measured-value signals acquired by a sensor, especially including a shunt resistor, being supplied to a respective processing channel that has at least one delta-sigma modulator. 117-. (canceled)18. A device for processing a measured-value signal representing a value , determined in analog form , for an output current of a converter , comprising:a sensor;at least one delta-sigma modulator; andfirst and second digital filters; wherein:the sensor (a) acquires the measured-value signal and (b) supplies the measured-value signal to the at least one delta-sigma modulator;the at least one delta-sigma modulator supplies a bit stream to the first digital filter;{'sub': S', 'S', 'S, 'the first digital filter (a) converts the bit stream into a stream of digital intermediate words and (b) supplies an output signal to the second digital filter, wherein the first digital filter includes a number of serially disposed accumulators, the bit stream and the stream of digital intermediate words being clocked with a clock frequency fand a clock period T−1/f;'}the second digital filter determines a difference between a first and a second result data-word stream such that the difference is output as output data-word stream;{'b': '1', 'the first and second result data-word streams are determined from the intermediate data-word stream over a first and a second time interval, the first and second time intervals having time duration T;'}{'sub': 'D', 'the first result data-word stream is determined from the intermediate data-word stream as a time-discrete differential of the order (n−1), with time duration T;'}{'sub': 'D', 'the second result data-word stream is determined from the intermediate data-word stream as a time-discrete differential of the order (n−1), with time duration T; and'}{'b': '1', 'sub': 'D', 'T is ...

POSITION SENSOR, POSITION MEASURING DEVICE AND METHOD FOR THE OPERATION THEREOF

A position signal generator for an electronic position measuring device is disclosed. In an embodiment, the position signal generator includes a signal generation device for generating a periodic magnetic signal, and an electric power supply device for supplying the signal generation device with electric energy. The position of the position signal generator is determined via the position measuring device. 1. A position measuring device for detecting a position of a position signal generator that can be moved along a measuring path , wherein the position measuring device comprises at least a first conductor loop that is arranged along the measuring path for detecting a magnetic signal , generated by the position signal generator , wherein the first conductor loop is embodied such that a magnetic coupling between a signal generation device of the position signal generator and the first conductor loop changes in dependence on the position of the position signal generator , and wherein it comprises an evaluation unit for detecting the position in dependence on a first signal , generated by the magnetic signal in the first conductor loop , wherein said position measuring device comprises at least one induction coil and is configured to generate , by means of said at least one induction coil , an induction field for supplying said position signal generator with energy.2. The position measuring device according to claim 1 , wherein furthermore a second conductor loop claim 1 , arranged at least sectionally along the measuring path claim 1 , is provided for detecting the magnetic signal generated by the position signal generator claim 1 , wherein the evaluation unit is designed for detecting the position in dependence on the first signal and a second signal generated by the magnetic signal in the second conductor loop claim 1 , and wherein preferably at least one segment of the first conductor loop is essentially approximately sine-shaped claim 1 , relative to a reference ...

INDUCTIVE SENSOR FOR MEASURING THE POSITION OF A SHAFT OF A VEHICLE

An inductive sensor for measuring the position of a shaft of a vehicle in a first direction (X) and a second direction (Y), from a target mounted on the shaft. The sensor () includes a printed circuit board () including at least one first receiving coil (), at least one second receiving coil () and at least one transmitting coil () surrounding the first receiving coil and the second receiving coil. The first receiving coil and the second receiving coil each include a plurality of N portions (A, B, C, A, B, C) that are electrically connected to one another and are disposed side by side on the printed circuit in the second direction, each portion extending on the printed circuit in the first direction in such a way as to determine the position of the target both in the first direction and in the second direction. 11114112021212324222324232422231424142324232323242424212323232424242114. An inductive sensor for measuring the position of a drive shaft () of a vehicle in a first direction (X) and a second direction (Y) , perpendicular to the first direction (X) , from a target () mounted on said shaft () , said sensor () comprising a printed circuit board () , said printed circuit board () comprising at least one first receiving coil () , at least one second receiving coil () and at least one transmitting coil () surrounding the first receiving coil () and the second receiving coil () and being configured in such a way as to generate an electrical voltage , the first receiving coil () and the second receiving coil () being arranged in such a way that the electrical voltage generated by the transmitting coil () generates a sine signal (SIN) in the first receiving coil () during detection of the target () and a cosine signal (COS) in the second receiving coil () during detection of the target () , wherein the first receiving coil () and the second receiving coil () each comprise a plurality of N portions (A , B , C , A , B , C) that are electrically connected to one another ...

INTERCONNECTED INVERTER AND METHOD OF MANUFACTURING INTERCONNECTED INVERTER

A system of an interconnected inverter includes an inverter that converts DC power from a DC power supply into AC power and provides AC power to an AC power line, an RDC that converts a voltage value obtained by a voltage sensor into electrical angle information that shows a phase angle of an output voltage, the voltage sensor obtaining a voltage value of an output voltage from the inverter to a power grid, and an ECU that controls the inverter to provide an alternating current in synchronization with an alternating current that flows through the AC power line by using timing at which an angle shown in the electrical angle information given from the RDC attains to a prescribed angle. Extra cost for diversion can be reduced. 1. An interconnected inverter comprising:an inverter circuit that converts DC power from a DC power supply into AC power and provides AC power to an AC power line;a resolver digital converter that converts a voltage value obtained by a voltage sensor into electrical angle information that shows a phase angle of an output voltage from the inverter circuit to the AC power line, the voltage sensor obtaining the voltage value of the output voltage; anda control unit that controls the inverter circuit to provide an alternating current in synchronization with an alternating current that flows through the AC power line by using timing at which an angle shown in the electrical angle information given from the resolver digital converter attains to a prescribed angle.2. The interconnected inverter according to claim 1 , whereinthe inverter circuit, the resolver digital converter, and the control unit are diverted from a system for driving a motor.3. The interconnected inverter according to claim 2 , whereinthe system for driving a motor is a vehicle.4. The interconnected inverter according to claim 1 , whereinthe AC power line is a three-phase AC power line.5. The interconnected inverter according to claim 1 , whereinthe control unit controls the inverter ...

RESOLVER CONVERTER AND MOTOR CONTROL DEVICE

A resolver converter includes a tracking loop circuit that calculates an angle θ from a resolver output signal, a control and diagnosis circuit that controls the tracking loop circuit and diagnoses based on the resolver output signal, wherein the control and diagnosis circuit, by operating the tracking loop circuit as a direct digital synthesizer (DDS), synchronously detects a noise signal superimposed on the resolver output signal. 1. A resolver converter comprising:{'b': '0', 'a tracking loop circuit that calculates an angle from a resolver output signal; and'}a control and diagnosis circuit that controls the tracking loop circuit and diagnoses based on the resolver output signal,wherein the control and diagnosis circuit, by operating the tracking loop circuit as a direct digital synthesizer (DDS), synchronously detects a noise signal superimposed on the resolver output signal.2. The resolver converter according to claim 1 , first and second multipliers;', 'a subtractor that subtracts an output of the second multiplier from an output of the first multiplier;', 'a comparator coupled to the subtractor;', 'a synchronous detection circuit coupled to the comparator;', 'a proportional and integral (PI) control circuit coupled to the synchronous detection circuit;', 'a phase accumulator and DDS circuit coupled to the PI control circuit;', 'a first low-pass filter coupled to the first multiplier;', 'a second low-pass filter coupled to the second multiplier;', 'an amplifier coupled to the first and second low-pass filters; and', 'an analog-to-digital converter (ADC) coupled to the amplifier,, 'wherein the tracking loop circuit comprising the phase accumulator and DDS circuit operates as a phase accumulator,', 'the first multiplier multiplies a first signal including a SIN θ of the resolver output signal by a COS wave outputted from the phase accumulator and DDS circuit, and', 'the second multiplier multiplies a second signal including a COS θ of the resolver output signal ...

WINDOW-ENABLED TIME-TO-DIGITAL CONVERTER AND METHOD OF DETECTING PHASE OF A REFERENCE SIGNAL

A window-enabled TDC and method of detecting phase of a reference signal. One embodiment of the window-enabled TDC includes: (1) a window generator configured to receive a reference signal and a clock signal, and (2) a TDC circuit coupled to the window generator and configured to be enabled based on the reference signal and disabled based on the clock signal.

AIR SPRING HEIGHT MEASUREMENT ARRANGEMENT

The subject invention relates to an air spring height measurement arrangement comprising a magnetic field transmitting arrangement () and a magnetic field receiving arrangement (). The magnetic field transmitting arrangement is adapted to adopt a first state and a second state with regard to the magnetic field receiving arrangement. One of the magnetic field transmitting arrangement () and the magnetic field receiving arrangement () comprises a first coil () and a second coil and the other comprises a third coil (). A first central axis () of the first coil and a second central axis () of the second coil enclose a first angle () and, in the first state, a third central axis () of the third coil () and the first central axis enclose a second angle (), which first and second angle cannot be 0°. 1. An air spring height measurement arrangement , comprisinga magnetic field transmitting arrangement; anda magnetic field receiving arrangement;wherein the magnetic field transmitting arrangement is adapted to adopt a first state and a second state with regard to the magnetic field receiving arrangement;wherein one of the magnetic field transmitting arrangement and the magnetic field receiving arrangement comprises a first coil and a second coil;wherein the other one of the magnetic field transmitting arrangement and the magnetic field receiving arrangement comprises a third coil;wherein a first central axis of the first coil and a second central axis of the second coil enclose a first angle which is unequal to 0°; andwherein, in the first state, a third central axis of the third coil and the first central axis enclose a second angle which is unequal to 0°.2. The air spring height measurement arrangement according to claim 1 ,wherein the magnetic field transmitting arrangement comprises a magnetic field receiving unit and the magnetic field receiving arrangement comprises a magnetic field transmitting unit;wherein the magnetic field transmitting arrangement is adapted to ...

SENSOR COIL OPTIMIZATION

In some embodiments, optimizing a coil design is provided. In particular, a method of providing an optimized position locating sensor coil design includes receiving a coil design, the coil design including geometric positions of a transmit coil and geometric positions of receive coils; linearizing one or more of the receive coils; and offset compensating the one or more of the receive coils. The linearization determines a geometric correction array for adjusting the geometric position of one of the receive coils. The offset correction includes determining a geometric shift to shift the geometric position of the one of the receive coils. 1. A method of providing an optimized position locating sensor coil design , comprising:receiving a coil design, the coil design including geometric positions of a transmit coil and geometric positions of receive coils;linearizing one or more of the receive coils; andoffset compensating the one or more of the receive coils.2. The method of claim 1 , wherein the receive coils include a sine receive coil and a cosine receive coil.3. The method of claim 1 , wherein linearizing the receive coils includessimulating a function of one of the receive coils as a function of target position;determining a difference between the function and an ideal function of the one of the receive coils;converting the difference to a geometric variation; andapplying a geometric variation to the geometric position of the receive coil.4. The method of claim 3 , wherein the function is a sine function.5. The method of claim 3 , wherein the function is a cosine function.6. The method of claim 3 , wherein the geometric variation is an array given by a geometric variation over the receive coil.7. The method of claim 1 , wherein offset compensating the receive coils includesdetermining a simulated offset of one of the receive coils in the absence of a target;determining an offset adjustment; andadjusting the one of the receive coils according to the offset ...

A/D CONVERSION CIRCUIT

An A/D conversion circuit converts an analog signal into numerical data. The A/D conversion circuit includes: a pulse delay circuit that includes an odd number of delay units connected in series, and inverting and delaying a pulse signal, and that changes the numeral number of the delay units which the pulse signal passes through in accordance with a value of the analog signal; latch circuits that synchronize the pulse signal with sampling clocks, and latch the pulse signal; encoders that set a position of the pulse signal to the numerical data by circulating encode values periodically set in order from an initial value to a final value to synchronously sample the encode values; subtractors that calculate each of differences between a previous value and a current value; and an adder that adds subtraction results. The encode values are set to be shifted between at least two encoders. 1. An A/D conversion circuit configured to convert an analog signal into numerical data , the ND conversion circuit comprising: [ are connected in series, and', 'are configured to invert and delay a pulse signal, and, 'includes a plurality of delay units that'}, 'is configured to change a numerical number of the delay units which the pulse signal passes through in accordance with a value of the analog signal;, 'a pulse delay circuit that'} synchronize the pulse signal delayed by the pulse delay circuits with a plurality of sampling clocks, and', 'latch the pulse signal;, 'a plurality of latch circuits configured to'}a plurality of encoders each of which is configured to set a position of the pulse signal to the numerical data by circulating encode values periodically set in order from an initial value to a final value to synchronously sample the encode values based on the pulse signal latched by the plurality of latch circuits and the plurality of sampling clocks;a plurality of subtractors configured to calculate each of differences between a previous value corresponding to the numerical ...

Semiconductor Device

In a semiconductor device, a sine wave signal is input to a first input part and a cosine wave signal is input to a second input part. A multiplexer alternately selects one of the sine wave signal and the cosine wave signal. An analog to digital converter converts the output signal of the multiplexer into a digital value. A switching circuit is coupled between at least one of the first and second input parts and the multiplexer. The switching circuit is configured to be able to invert the input sine wave signal or the input cosine wave signal, in order to reduce the angle detection error due to the non-linearity error of the A/D converter. 1. A semiconductor device comprising:a first input part to which a first signal indicating the sine of an angle to be detected is input;a second input part to which a second signal indicating the cosine of the angle is input;a multiplexer for selecting one of the first and second signals;an analog to digital converter for converting the output signal of the multiplexer into a digital value; anda switching circuit coupled between at least one of the first and second input parts and the multiplexer,wherein the switching circuit is configured to be able to invert the input first or second signal.2. The semiconductor device according to claim 1 , further comprising:an angle operation circuit for calculating the angle based on the first and second signals converted into digital values by the analog to digital converter; anda switch control circuit for controlling the switching of the switching circuit based on the angle calculated by the angle operation circuit.3. The semiconductor device according to claim 2 ,wherein the first signal is a signal obtained by modulating an excitation signal, which is input to a resolver, by the sine of the angle,wherein the second signal is a signal obtained by modulating the excitation signal by the cosine of the angle, andwherein the switch control circuit is configured to invert the input first or ...

BRUSHLESS LINEAR ROTARY TRANSFORMER

A brushless linear rotary transformer apparatus for determining angular position and velocity of a rotor includes a rotor, a stator, a primary coil winding, pairs of secondary coil windings, bearings, an excitation power supply, and a signal receiving and processing system. The primary coil winding is wrapped around a hollow cylinder body on one end of the stator. One end of the rotor shaft is arranged in the hollow cylinder body. Another ends of the rotor shaft and the stator are connected by a bearing. Pairs of secondary coil windings are embedded in the stator and on the inner side of the stator. An alternating magnetic field is produced by the excitation power supply through the primary coil winding, and the induced electromotive forces at the ends of the secondary coil windings are associated with the angular position of the rotor. The signal receiving and processing system samples and processes the signals from the secondary coil winding, and outputs the parameters concerning the angular position, the angular velocity, and the rotation number of the rotor. The brushless linear rotary transformer has the advantages of simple and reliable structure, which can be applied to measure the angular displacement and the angular velocity in multiple turns. 1123456732121254226341741. A brushless linear rotary transformer apparatus for determining angular position and angular velocity of a rotor , said apparatus compromising a rotor () , a stator () , a primary coil winding () , pairs secondary coil windings () , a bearing () , an excitation power supply () , and a signal receiving and processing system (); the primary coil winding () being wrapped around a hollow cylinder body on one end of the stator (); one end of the shaft the rotor () being arranged in the hollow cylinder body on the end of the stator (); another ends of the saft of the rotor () and the stator () being connected by the bearing (); pairs secondary coil windings () being embedded in the stator () and ...

POSITION SENSOR, POSITION MEASURING DEVICE AND METHOD FOR THE OPERATION THEREOF

A position signal generator for an electronic position measuring device is disclosed. In an embodiment, the position signal generator includes a signal generation device for generating a periodic magnetic signal, and an electric power supply device for supplying the signal generation device with electric energy. The position of the position signal generator is determined via the position measuring device. 1. A position signal generator for an electronic position measuring device , the position signal generator comprising:a signal generation device to generate a periodic magnetic signal; andan electric power supply device to supply the signal generation device with electric power.2. The position signal generator of claim 1 , wherein the electric power supply device includes at least one energy storage.3. The position signal generator of claim 1 , wherein the electric power supply device includes at least one energy converter claim 1 , embodied to convert at least one of mechanical energy claim 1 , thermal energy claim 1 , radiation energy and energy tapped from at least one of a magnetic and electric field claim 1 , into electric power.4110. The position signal generator of claim 1 , wherein the signal generation device () comprises at least one oscillator.5. The position signal generator of claim 1 , wherein the periodic signal has a frequency component in the range of approximately one kilohertz to approximately 200 kilohertz.6. A position measuring device for detecting a position of a position signal generator claim 1 , movable along a measuring path comprising:at least one conductor loop, arranged along the measuring path, to detect a magnetic signal generated by the position signal generator, the at least one conductor loop being embodied such that a magnetic coupling between a signal generation device of the position signal generator and the at least one conductor loop is configured to change in dependence on the position of the position signal generator; andan ...

Systems and methods for correcting non-sinusoidal signals generated from non-circular couplers

A system including a non-circular coupler, a sensor, a memory module, and a processor module is provided. The sensor includes a transmitter coil adapted to be energized by a high frequency current source and at least two receiving coils. One of the receiver coils generate a sine-like function output signal and the other generates a cosine-like function output signal upon rotation of the coupler. The memory module is operable to compensate for non-sinusoidal output signals caused by a plurality of geometric errors and a gap between the coupler and the at least two receiving coils. The processor module configured to process the non-sinusoidal output signals from both the first and second receiver coils, determine an error in the non-sinusoidal output signals from both the first and second receiver coils, mathematically compensate the assembly to eliminate the error and generates an output signal representative of the rotational position of the coupler. 1. A sensor system comprising:a coupler;a sensor having a transmitter coil and at least two receiving coils generating a non-sinusoidal output signals, one of the receiver coils generates a sine-like function upon rotation of the coupler and the other of the receiver coils generates a cosine-like function upon rotation of the coupler; and compute an arctangent of the output signals from the first and second receiver coils;', 'correct at least one error of a plurality of geometric errors from an electrical angle of the arctangent; and', 'generate a corrected output signal representative of the rotational position of the coupler., 'a processor module configured to process the non-sinusoidal output signal from both the first and second receiver coils, the processor module configured to2. The sensor system of claim 1 , wherein the sensor is spaced apart from the coupler to form a gap.3. The sensor system of claim 2 , wherein the gap is a dynamically changing airgap.4. The sensor system of claim 2 , further comprising:a ...

METHOD AND APPARATUS FOR OPERATING A RESOLVER, AND RESOLVER DEVICE

The invention relates to an apparatus () for operating a resolver (), which has at least one receiver winding () or at least one excitation winding (), which are/can be associated with a rotatably mounted shaft (), in particular a rotor shaft of an electric motor, said apparatus also having a device () which determines an angular position of the shaft () as a function of an induced voltage detected by the excitation winding () by means of a desired excitation signal (SES) with a predeterminable frequency and amplitude and by the receiver winding (). According to the invention, means () for limiting an electrical voltage on the excitation winding () are associated with the excitation winding (), wherein the means () limit the voltage only above a maximum normal voltage in only one current direction. 1713425. An apparatus () for operating a resolver () , which has at least one receiver winding ( , ) or at least one excitation winding () , which are/can be associated with a rotatably mounted shaft () , said apparatus also having{'b': 9', '5', '2', '3', '4, 'a device () which determines an angular position of the shaft () as a function of an induced voltage generated by the excitation winding () by means of a desired excitation signal (SES) with a predetermined frequency and amplitude and detected by the receiver winding (, ), and'}{'b': 10', '2', '10, 'means () for limiting an electrical voltage on the excitation winding (), wherein the means () limits the voltage only above a maximum normal voltage in only one current direction.'}210111211. The apparatus according to claim 1 , wherein the means () comprises a Zener diode () and a diode () connected in series with the Zener diode ().311122. The apparatus according to claim 1 , wherein the Zener diode () and the diode () are connected in parallel to the excitation winding ().4132. The apparatus according to claim 1 , further comprising an evaluation device () associated with the excitation winding () claim 1 , said ...

PLANAR LINEAR INDUCTIVE POSITION SENSOR HAVING EDGE EFFECT COMPENSATION

A planar linear inductive position sensor is formed on a substrate and includes at least one oscillating coil, a first sensing coil having opposing edges extending beyond opposing edges of the oscillating coil along a linear axis along which a linear position of a conductive object is to be sensed, and a second sensing coil having opposing edges extending beyond opposing edges of the oscillating coil along the linear axis. The first and second sensing coils have geometries selected such that equal opposing magnetic fields are induced in the first and second sensing coils in the presence of a magnetic field generated by the oscillating coil when no conductive target is proximate to the first and second sensing coils and unequal opposing magnetic fields are induced in the first and second sensing coils when the conductive target is proximate to the first and second sensing coils, a difference in the unequal opposing magnetic fields induced in the first and second sensing coils correlated to the position of the conductive target. 1. A planar linear inductive position sensor comprising:a substrate;at least one oscillating coil;a first sensing coil having opposing edges extending beyond opposing edges of the oscillating coil along a linear axis along which a linear position of a conductive object is to be sensed;a second sensing coil having opposing edges extending beyond opposing edges of the oscillating coil along the linear axis;the first and second sensing coils having geometries selected such that equal opposing magnetic fields are induced in the first and second sensing coils in the presence of a magnetic field generated by the oscillating coil when no conductive target is proximate to the first and second sensing coils and unequal opposing magnetic fields are induced in the first and second sensing coils when the conductive target is proximate to the first and second sensing coils, a difference in the unequal opposing magnetic fields induced in the first and ...

INDUCTIVE POSITION DETECTOR

An inductive position detector with a first and second body, at least one of said bodies being displaceable relative to the other along a measurement path wherein said first body comprises one or more antenna windings forming a first arrangement of windings and said second body comprises a passive resonant circuit incorporating one or more target windings in series with a capacitor; said circuit covering at least in part said first arrangement; characterized in that said first body comprises an additional winding arrangement disposed along at least part of said measurement path; said additional winding arrangement being spaced from said first arrangement of windings; and said second body comprises an additional winding arrangement covering at least in part said additional winding arrangement of said first body. 122-. (canceled)23. An inductive position detector with a first and a second body which are displaceable relative to one another along a measurement pathwherein said first body comprises:at least first and second antenna winding arrangements, each of said antenna winding arrangements defining a plurality of adjacent receive winding loops extending in the direction of the measurement path,and wherein said second body comprises:a passive resonant circuit incorporating at least first and second target winding arrangements in series with a capacitor, said second target winding arrangement defining a plurality of adjacent winding loops extending in the direction of the measurement path; said first and second antenna winding arrangements and said first and second target winding arrangements both being spaced apart orthogonally of said measurement path so as to be separate, and said first and second bodies being disposed so that first and second target winding arrangements cover at least a part of first and second antenna winding arrangements respectively;wherein said first antenna winding arrangement further includes a transmit winding,the receive winding loops of ...

BRUSHLESS RESOLVER AND ROTATION-ANGLE DETECTION DEVICE

A brushless resolver includes a rotor having a one-phase excitation coil and a stator having two-phase detection coils. The rotor is mounted to a shaft of a motor to detect a rotation angle of the motor. An induction coil is located around the shaft. The induction coil is connected to the excitation coil. Electromotive force induced in the induction coil by a change of magnetic flux of the motor, which passes through the shaft, is used as an excitation signal supplied to the excitation coil. 14-. (canceled)5. A brushless resolver for detecting a rotation angle of a motor , comprising:a stator having two-phase detection coils;a rotor having a one-phase excitation coil, the rotor being to be mounted to a shaft of the motor; andan induction coil connected to the excitation coil and to be located around the shaft, the induction coil inducing electromotive force in response to a change of magnetic flux of the motor, the magnetic flux passing through the shaft, and the electromotive force being supplied to the excitation coil as an excitation signal.6. The brushless resolver according to claim 5 , wherein the magnetic flux of the motor is a leakage flux of the motor.7. The brushless resolver according to claim 5 , wherein the induction coil is wound around a winding frame formed on the rotor as a single unit.8. A rotation-angle detection device comprising:a brushless resolver that includes: a stator having two-phase detection coils; a rotor having a one-phase excitation coil, the rotor being to be mounted to a shaft of the motor; and an induction coil connected to the excitation coil and to be located around the shaft, the induction coil inducing electromotive force in response to a change of magnetic flux of the motor, the magnetic flux passing through the shaft, and the electromotive force being supplied to the excitation coil as an excitation signal;an excitation-signal-component extraction circuit that extracts an excitation signal component from output signals of the ...

METHOD FOR PROCESSING A MEASURED-VALUE SIGNAL DETERMINED IN AN ANALOG MANNER, A RESOLVER SYSTEM FOR IMPLEMENTING THE METHOD AND A METHOD FOR DETERMINING AN OUTPUT CURRENT OF A CONVERTER

In method for processing a measured-value signal determined in an analog manner and a resolver system for implementing the method, the measured-value signal being supplied to a delta-sigma modulator, which makes a bit stream, particularly a one-bit data stream, available on the output side, in particular, whose moving average corresponds to the measured-value signal, the bit stream being supplied to a first digital filter, which converts the bit stream into a stream of digital intermediate words, that is a multibit data stream, the first digital filter having three serially arranged differentiators, the bit stream being clocked at a clock frequency f, that is, at a clock-pulse period T=1/f, and therefore the stream of digital intermediate words being clocked, and thus updated, at a clock-pulse frequency f, that is, at a clock-pulse period T=1/f, the output signal of the first digital filter being supplied to a second digital filter, the second digital filter having as its output data-word stream the difference between a first and a second result data-word stream, the first and second result data-word stream being determined around a first and second time interval from the intermediate data-word stream, the first and second time interval being situated at a distance in time T the first result data-word stream being determined as a time-discrete second derivation with time scale TD and the second result data-word stream being determined as a time-discrete second derivation with time scale TD. 118-. (canceled)19. A method for processing a measured-value signal determined in an analog manner , comprising:supplying the measured-value signal to a delta-sigma modulator, which makes a bit stream available on an output side;supplying the bit stream to a first digital filter, the first digital filter having a number n of serially arranged accumulators, n being a whole number and equal to at least 1;converting the bit stream, by the first digital filter, into a stream of ...

RESOLVER

Disclosed is a resolver, which includes a stator having at least one excitation coil and at least one output coil, and a rotor disposed at a center space in the stator with a predetermined gap from the stator, the rotor rotating based on a rotary shaft to change a gap permeance with respect to the stator, wherein the stator includes a back yoke having a ring-shaped body, and a plurality of teeth formed at an inner circumference of the back yoke so that the excitation coil and the output coil are wound thereon, wherein the rotor includes a ring-shaped body having a center hole into which the rotary shaft is inserted, and a plurality of salient poles formed at an outer circumference of the ring-shaped body. 1. A resolver , comprising a stator having at least one excitation coil and at least one output coil , and a rotor disposed at a center space in the stator with a predetermined gap from the stator , the rotor rotating based on a rotary shaft to change a gap permeance with respect to the stator ,wherein the stator includes a back yoke having a ring-shaped body, and a plurality of teeth formed at an inner circumference of the back yoke so that the excitation coil and the output coil are wound thereon,wherein the rotor includes a ring-shaped body having a center hole into which the rotary shaft is inserted, and a plurality of salient poles formed at an outer circumference of the ring-shaped body, and {'br': None, 'i': Wb≥', 'Wr, '0.66×\u2003\u2003Equation 1'}, 'wherein the back yoke of the stator and the salient pole of the rotor have a relation satisfying Equation 1 belowwhere Wb represents a width of the back yoke, and Wr represents a width of the salient pole, which is a distance from a peak point of the salient pole to the center hole.2. The resolver according to claim 1 , wherein the back yoke of the stator and the salient pole of the rotor have a relation satisfying Equation 2 below:{'br': None, 'i': Wr≤Wb≤', 'Wr, '0.66×8×\u2003\u2003Equation 2'}where Wb ...

Semiconductor Device

In a semiconductor device, a sine wave signal is input to a first input part and a cosine wave signal is input to a second input part. A multiplexer alternately selects one of the sine wave signal and the cosine wave signal. An analog to digital converter converts the output signal of the multiplexer into a digital value. A switching circuit is coupled between at least one of the first and second input parts and the multiplexer. The switching circuit is configured to be able to invert the input sine wave signal or the input cosine wave signal, in order to reduce the angle detection error due to the non-linearity error of the A/D converter. 13- (canceled)4. A semiconductor , device comprising:a first input part to which a first signal indicating the sine of an angle to be detected is input;a second input part to which a second signal indicating the cosine of hte angle input;a multiplexer for selecting one of the first and second signals;an analog to digital converter for converting the output signal of the multiplexer into a digital value; anda switching circuit coupled between at least one of the first and second input parts and the multiplexer,wherein the switching circuit is configured to be able to invert the input first or second signal, an angle operation circuit for calculating the angle based on the first and second signals converted into digital values by the analog to digital converter, and', 'a switch control circuit for controlling the switching of the switching circuit based on the angle calculated by the angle operation circuit,, 'wherein the semiconductor device further comprises'}wherein the first signal is a signal obtained by modulating an excitation signal, which is input to a resolver, by the sine of the angle,wherein the second signal is a signal obtained by modulating the excitation signal by the -cosine of the angle,wherein the switch control circuit is configured to invert the input first or second signal in such, a way that the first and ...

STATOR OF RESOLVER AND THE RESOLVER

A stator of a resolver has an annular core having teeth, an insulator that covers a part of the core, windings wound around the teeth with the insulator interposed therebetween, and a cover that covers the windings and connecting wires that are extensions of the windings. The insulator has winding parts, a connecting wire part, a barrier wall and a plurality of island parts, and a positioning projection part is formed on the island parts. The cover is formed by cover sections arranged along the circumference thereof, each of the cover sections has a protrusion part that is to be welded and fixed to one of the island parts. Each of the cover sections is positioned with a positioning recess of the protrusion part being fitted onto the positioning projection part and a side wall thereof being interposed between the barrier wall and the positioning projection part. 1. A stator of a resolver , comprising:a core having an annular shape and a plurality of teeth protruded from an inner circumferential surface or an outer circumferential surface of the core along a circumference thereof;an insulator that has an annular shape and covers a part of the core;windings wound around the teeth with the insulator interposed therebetween; anda cover that covers the windings and connecting wires that are extensions of the windings,wherein the insulator comprises winding parts around each of which the windings are wound, a connecting wire part having an annular shape and on which the connecting wires are disposed, a barrier wall provided on a side of the connecting wire part opposite to the winding parts, a plurality of island parts formed along a circumference thereof on a side of the barrier wall opposite to the connecting wire part, and a positioning projection part being formed on each of the island parts,the cover is formed by a plurality of cover sections arranged along a circumference thereof,each of the cover sections has a protrusion part that corresponds to one of the island ...

Motor control system and semiconductor device

A motor control system includes a first MCU and a second MCU. The first MCU includes an error detection unit, a resolver digital converter, and a first PWM generation unit. The resolver digital converter includes an encoder unit, which generates encoder pulses based on angle information and outputs the encoder pulses to the second MCU. The error detection unit outputs an error signal to the second MCU, when an error is detected in the first MCU. The first MCU controls the resolver digital converter to operate using a backup clock supplied from the second MCU.

ELECTROMAGNETIC INDUCTION SENSOR, OVERLAY MEMBER FOR ELECTROMAGNETIC INDUCTION SENSOR, AND MANUFACTURING METHOD OF ELECTROMAGNETIC INDUCTION SENSOR

Disclosed herein is an electromagnetic induction sensor that is used with a position indicator and includes coils for electromagnetic coupling with the position indicator. The electromagnetic induction sensor includes: a sensor board main body that includes an insulating substrate and a surface sheet attached to a side of a first surface of the insulating substrate, on which side a position is indicated by the position indicator; at least part of conductors forming the coils being formed on a second surface of the insulating substrate opposite from the first surface; and an overlay member that includes a magnetic powder material layer and is adhered to the side of the second surface of the sensor board main body. 1. An electromagnetic induction sensor that is used with a position indicator and that includes coils for electromagnetic coupling with the position indicator , the electromagnetic induction sensor comprising:a sensor board including the coils; andan overlay member that includes a magnetic powder material layer, the magnetic powder material layer defining a layer surface and a thickness direction that extends perpendicularly to the layer surface,wherein a magnetization direction of magnetic powder in the magnetic powder material layer extends along the layer surface and perpendicularly to the thickness direction of the magnetic powder material layer.2. The electromagnetic induction sensor according to claim 1 , wherein the overlay member includes the magnetic powder material layer and a shield material formed of a metal layer claim 1 , and the magnetic powder material layer is arranged closer to the sensor board than the metal layer.3. The electromagnetic induction sensor according to claim 1 , whereinthe overlay member further includes an insulator, one surface thereof being applied with an adhesive, and another surface thereof being applied with the magnetic powder to form the magnetic powder material layer, andsaid adhesive of the overlay member is ...

Movement Apparatus with Decoupled Position Controllers

The disclosure relates to a method for operating a movement apparatus having a first assembly and a second assembly. The first assembly includes a base and several permanent-magnet arrangements that are connected to the base via actuators such that they move as a whole relative to the base in at least one degree of freedom by the assigned actuator, the second assembly including a base and a permanent-magnet arrangement arranged firmly relative to the base. Position controllers are provided, each with a controlled variable and with a correcting variable. The controlled variable is one of six possible degrees of freedom with regard to a relative position between the first and second assembly. The correcting variable represents a force or a torque that has been assigned to the degree of freedom. Desired positions of the actuators are computed from the correcting variables and the actuators are set accordingly. 1. A method for operating a movement apparatus having a first assembly and a second assembly , the first assembly including a first base and several first permanent-magnet arrangements , the first permanent-magnet arrangements being connected to the first base via respectively assigned actuators such that they are each configured to move as a whole relative to the first base in at least one degree of freedom by the respectively assigned actuator , the second assembly including a second base and a second permanent-magnet arrangement , the second permanent-magnet arrangement being arranged firmly relative to the second base , the method comprising:providing at least two position controllers, each with a single scalar controlled variable and with a single scalar correcting variable, the single scalar controlled variable being, in each instance, one of six possible degrees of freedom with regard to a relative position between the first assembly and the second assembly, the single scalar correcting variable representing one of (i) a force and (ii) a torque that has ...

Sensing apparatus and method

There is described a position sensor comprising at least one planar substrate having formed thereon a magnetic field generator which comprises conductive tracks formed on at least two planes defined by the at least one planar substrate. An intermediate coupling element is operable to move relative to the at least one planar substrate along a measurement direction transverse to the planar substrate, the detector detects the position of the intermediate coupling element in a magnetic field generated by the magnetic field generator. The position sensor has particular application in man-machine interfaces such as push buttons and rotary switches.

Sensing apparatus and method

There is described a sensor comprising an excitation winding, a signal generator operable to generate an excitation signal and arranged to apply the generated excitation signal to the excitation winding, a sensor winding electromagnetically coupled to the excitation winding and a signal processor operable to process a periodic electric signal generated in the sensor winding when the excitation signal is applied to the excitation winding by the signal generator to determine a value of a sensed parameter. The excitation signal comprises a periodic carrier signal having a first frequency modulated by a periodic modulation signal having a second frequency, the first frequency being greater than the second frequency. In this way, the sensor is well suited to using digital processing techniques both to generate the excitation signal and to process the signal induced in the sensor windings. In an embodiment, the sensor is used to detect the relative position of two members. In other embodiments, the sensor is used to detect environmental factors such as temperature and humidity.

Modulated field position sensor

信号処理回路

【課題】外部からの信号を用いて、位置センサから十分な出力が得られるように、位置センサに適した励磁信号を作成することができる信号処理処理回路を提供すること。 【解決手段】励磁コイル２１と検出コイル２４，２５を有するセンサ部２０に励磁信号Ｐ４を供給し、センサ部２０から出力される検出信号Ｐ５，Ｐ６を取得する回路部３０に、外部から供給される正弦波信号Ｐｉｎをトリガ検出して矩形波信号Ｐ２とするトリガ検出回路３８と、基準クロックを発生する基準クロック発生器３１と、基準クロック及び矩形波信号Ｐ２に基づき、正弦波信号Ｐｉｎと同期するとともに同じ周波数である励磁信号波形を作成するための波形データを作成するロジック回路１５と、波形データに基づき励磁コイル２１に供給する励磁信号Ｐ４を作成するＤ／Ａコンバータ３５とを設ける。 【選択図】 図１

Digital position detector

내용 없음. No content.

传感器装置及方法

本发明描述了一种传感器，该传感器包括：激励线圈；信号发生器，它可操作地产生激励信号和设置成给激励线圈施加产生的激励信号；传感器线圈，它电磁耦合到激励线圈；和信号处理器，在由信号发生器将激励信号施加于激励线圈时，该信号处理器可操作地处理在传感器线圈中产生的周期电信号，从而确定被读出的参数的值。激励信号包括被具有第二频率的周期调制信号调制的具有第一频率的周期载波信号，第一频率高于第二频率。通过这种方式，该传感器很好地适用于使用数字处理技术，从而产生激励信号和处理在传感器线圈中感应的信号。在一个实施例中，该传感器用于检测两个部件的相对位置。在另一实施例中，该传感器用于检测诸如温度和湿度之类的环境因素。

Digital angle detection method

Sensing apparatus and method

본 발명은 위치와 같은 파라미터를 감지하는 감지장치에 관한 것으로서, 코일(7, 9)과 같은 여기권선과, 여긴신호를 발생시킬 수 있고 발생된 여기신호를 여기권선에 인가하도록 정렬된 신호발생기(41, 42, 43)와, 신호발생기에 의해 여기권선에 인가되는 여기신호에 응답하여 감지기에 의해서 측정되는 파라미터의 값을 나타내는 주기적긴 전기신호가 발생되도록, 여기권선에 전자기적으로 결합될 수 있는 감지코일(11)과, 및 측정되는 파라미터값을 결정하기 위해 감지기권선에 발생된 주기적 전기신호를 처리하는 신호처리기(108)를 포함하며, 상기 신호처리기는 여기신호의 주파수와 약간 다른 주파수를 갖는 제 2 신호(f1)을 발생시키도록 정렬되고, 또한 제 2 신호와 감지코일로부터 수신된 신호를 합성하여 여기신호의 주파수와 제 2 신호의 주파수 차와 동일한 주파수 성분(f0-f1)을 갖는 제 3 신호를 생성하도록 정렬되며, 그 다음에 신호처리기는 제 3 신호의 위상으로부터 파라미터를 결정하는 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensing device for sensing a parameter such as a position. The present invention relates to an excitation winding such as coils 7 and 9 and a signal generator arranged to generate an excitation signal and to apply the generated excitation signal to the excitation winding ( 41, 42, and 43), and in response to an excitation signal applied to the excitation winding by a signal generator, it can be electromagnetically coupled to the excitation winding so that a periodic long electrical signal is generated which indicates the value of the parameter measured by the detector. A sensing coil 11 and a signal processor 108 for processing the periodic electrical signal generated in the sensor winding to determine the measured parameter value, the signal processor having a frequency slightly different from the frequency of the excitation signal. Arranged to generate the second signal f1, and also synthesized from the signal received from the second signal and the sensing coil, the frequency difference between the frequency of the excitation signal and the second signal; Arranged to produce a third signal having the same frequency component f0-f1, and then the signal processor is to determine a parameter from the phase of the third signal.

Software type resolver-digital converter

본 발명은 짐벌 시스템에서 짐벌 장착 계기(16)의 회전 각도( )를 연산하기 위한 소프트웨어 이용 리졸버 - 디지탈 변환기(RDC)(80)에 관한 것이다. 이 RDC(80)는 상기 짐벌 시스템(32) 내의 리졸버(32)로부터 수신된 파라메터 신호를 이용해서 짐벌 장착 계기의 회전 각도를 연산한다. 파라메터 신호는 리졸버의 기준 신호와 함께 멀티플렉서(60)로 입력된 후 멀티플렉스된다. 이어서 이 신호는 아날로그-디지탈 변환기(38)로 입력된 후에 디지탈 형태로 변환된다. 이후에 이 디지탈 신호가 짐벌 시스템과 연관된 처리기(36)로 입력된다. 이 처리기는 다수의 시스템 연산을 행하는 것 외에 시스템 동작 향상을 위한 처리를 위해 수신된 디지탈 신호를 필터링하고 회전 각도( )에 대한 값을 연산하며 상기 연산된 값을 시스템 회로(31)로 출력하도록 적절한 소프트웨어를 통해 프로그램되어 있다. 본 발명은 변환기(80)가 종래의 시스템 프로세서(36)에서 구성되는 것처럼 리졸버 - 디지탈 변환기의 하드웨어 부품(40, 42, 44)을 별도로 설치할 필요가 없다. 따라서 본 발명을 시스템 구성에 필요한 가격 및 회로 가판의 공간을 절약할 수 있다. The present invention is a rotation angle of the gimbal mounting instrument 16 in the gimbal system ( Software-enabled resolver-to-digital converter (RDC) 80 for computing < RTI ID = 0.0 > The RDC 80 calculates the rotation angle of the gimbal mounted instrument using the parameter signal received from the resolver 32 in the gimbal system 32. The parameter signal is input to the multiplexer 60 together with the reference signal of the resolver and then multiplexed. This signal is then input to analog-to-digital converter 38 and then converted to digital form. This digital signal is then input to processor 36 associated with the gimbal system. In addition to performing a number of system operations, this processor filters the received digital signal for processing to improve system operation. Is programmed via appropriate software to calculate a value for the < RTI ID = 0.0 > The present invention eliminates the need for separate installation of the hardware components 40, 42, 44 of the resolver-digital converter as the converter 80 is configured in a conventional system processor 36. Therefore, the present invention can save the cost and space of the circuit board required for the system configuration.

Device for transmission to the distance of the angle of the shaft turn

FIELD: electrical equipment. SUBSTANCE: invention relates to the field of automation. Device for transferring the rotation angle of the shaft comprises a receiving unit, a transmitting unit, a receiving shaft, a transmitting shaft, a power unit. Power supply unit is configured to provide two equal, but opposite in sign, DC supply voltages with a common zero wire. Transmitting unit is provided with a transmitting potentiometer whose engine is mechanically connected to the transmitting shaft and the receiving unit is equipped with a motorized potentiometer whose engine is mechanically connected to the receiving shaft. Device is equipped with a reducer, a reversing motor and an operational amplifier. Outputs of the operational amplifier are connected to the power supply. EFFECT: technical result of the invention consists in reducing the energy consumption of the device due to a sharp decrease in energy consumption during the stationary state of the shafts, reducing the interference created by the device. 1 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 654 123 C1 (51) МПК G08C 19/38 (2006.01) H03M 1/66 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК G08C 19/38 (2006.01); H03M 1/64 (2006.01) (21)(22) Заявка: 2017125642, 17.07.2017 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Иванов Николай Григорьевич (RU), Воропай Сергей Александрович (RU) Дата регистрации: 16.05.2018 310 985 C1, 20.11.2007. SU 1777207 A1, 19.05.1986. US 4,754,259 A, 28.06.1988. US 2,296,436 A, 22.09.1946. (45) Опубликовано: 16.05.2018 Бюл. № 14 2 6 5 4 1 2 3 R U (54) Устройство для передачи на расстояние угла поворота вала (57) Реферат: Изобретение относится к области автоматики. постоянных напряжения питания с общим Технический результат изобретения заключается нулевым проводом. Передающий блок снабжен в снижении потребляемой устройством передающим потенциометром, движок которого электроэнергии за счет ...

Method for compensating output of resolver-digital converter

본 발명은 레졸버-디지털 변환기의 출력신호에 포함되어 있는 왜곡신호를 제거하는 레졸버-디지털 변환기의 출력 보상 방법에 관한 것으로, 회전자의 위치 측정값을 입력받는 단계; 상기 회전자의 위치 측정값과 상기 회전자의 각속도에 따라 비선형 상태 변수를 추정하여 상기 회전자의 위치 추정값을 연산하는 단계; 및 상기 회전자의 위치 측정값과 상기 위치 추정값을 비선형 상태 방정식을 이용하여 상기 회전자의 위치 측정값을 보정하는 단계를 포함하는 것을 특징으로 한다.

Resolver signal conversion device and method

在旋转变压器信号转换装置及其方法中，将来自旋转变压器的正弦波输出放大并进行模拟－数字转换后，通过带通滤波器，将具有以励磁信号的频率为中心频率的、规定频带的频率成分取出，与基于所述励磁信号的参考信号同步进行采样，根据该采样的信号作成检测角度信号的正弦值。同样，根据来自旋转变压器的余弦波输出作成检测角度信号的余弦值，根据检测角度信号的正弦值和余弦值计算出检测角度。借助于此，消除输入的旋转变压器信号受到马达产生的磁场和PWM驱动引起的开关噪声等造成的干扰噪声的影响，因为运算处理不具有频率相关性，因此降低了检测角度的误差。

Method and circuit for signal detection of capacity type position measuring transducer

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

Phase Modulated Digital Position Detector

내용 없음

Assembly and method for determining angular position

借助于电感传感器（1）来确定旋转物体的当前角位置的一种装置和一种方法。在使用移相器（9，10，11）和符号确定单元（12，13）的情况下从传感器的一次绕组（2）的激励信号（17）和在传感器的两个二次绕组（3，4）中所感应的电压中导出三个另外的信号。总共6个信号在使用采样和保持抽样单元（14）的情况下被抽样并且被提供给用于分析的处理器（15），该处理器由此计算出旋转机器的在抽样时间的当前角位置。

Rotation angle sensor

转角传感器(10)包括具有至少两个线圈(20)的定子元件(12)、相对于定子元件(12)能转动支承的转子元件(14)，实施所述定子元件用于与转角有关地不同程度地与所述至少两个线圈(20)中的每一个感应耦合，并且包括分析处理单元(22)，用于确定所述转子元件(14)和所述定子元件(12)之间的转角。所述至少两个线圈(20)在星形接点(30)中连接在一起，其中，实施所述分析处理元件(22)用于给所述至少两个线圈(20)中的每一个供给多相交流电压的单个交流电压，并且其中，实施所述分析处理元件(22)用于求得所述星形接点(30)的电势的量值和/或相位，并且由此确定所述转角。

Phase detection circuit, resolver / digital converter using the same, and control system

Absolute position detection device and its error correction method

이 발명은 한 사이클 내에 하나이상의 사인 및 코사인파를 발생하는 사인 및 코사인파 발생부와, 그 사인 및 코사인파 발생부에 의해 발생한 입력사인 및 코사인파를 디지탈값으로 변환시키는 아날로그/디지탈 변환부를 구성하는 절대위치 검출장치에 관한 것이다. 연산부를 사용하여 그 아날로그/디지탈 변환부에서 그 디지탈 값에 의해 오프셋, 진폭 및 위상에러를 포함하는 에러(errors)의 보정을 산출한다. 이 장치에서 연산부는 그 에러보정 전 또는 에러보정시에 행한 연산과 그 아날로그/디지탈 변환부에서의 디지탈 값에 의해 구한 위상각에서 하나의 위상각에 대하여 연산함으로써, 하드웨어에 보정회로를 추가함이 없이 염가의 신뢰도가 높은 절대위치 검출장치를 얻을 수 있다.

Detector

A time-domain voltage comparator for analog digital converter

본 발명은 아날로그 디지털 변환기에 관한 것으로서 더욱 상세하게는 전압차이를 시간차이로 변환하는 아날로그 디지털 변환기의 시간영역 전압 비교기에 관한 것이다. 이를 위해 본 발명은 아날로그-디지털 변환기에 사용되는 전압 비교기에 있어서, 적어도 하나 이상의 시간 지연 단이 직렬로 접속되어 전압을 시간 정보로 변환하는 제1 전압-시간 변환기와, 적어도 하나 이상의 시간 지연 단이 직렬로 접속되어 전압을 시간 정보로 변환하는 제2 전압-시간 변환기 및, 상기 제1 전압-시간 변환기와 제2 전압-시간 변환기에서 출력되는 시간의 차이를 판별하는 위상 비교기를 포함하여 구성된다. 아날로그 디지털 변환기, 시간 지연단, 위상 검출기 The present invention relates to an analog-to-digital converter, and more particularly, to a time domain voltage comparator of an analog-to-digital converter for converting a voltage difference into a time difference. To this end, the present invention provides a voltage comparator for an analog-to-digital converter, wherein at least one time delay stage is connected in series to convert a voltage into time information, and at least one time delay stage is provided. And a second voltage-time converter connected in series to convert voltage into time information, and a phase comparator for discriminating a time difference output from the first voltage-time converter and the second voltage-time converter. Analog-to-Digital Converters, Time Delay Stages, Phase Detectors

Position sensor

The invention relates to a position sensor having several sensor elements arranged lying behind one another and a position pick-up interacting with these. For obtaining error-free measurement results, it is provided that the sensor elements (2-5) are constructed as primary coils (6-9) fed at different phase angle and that the position pick-up (10) exhibits a secondary coil (11) changing its position to the primary coils (6-9) with the position to be sensed, the phase angle of a voltage induced in the secondary coil (11) being a measure of the position assumed. <IMAGE>

Resolver digital converter and position detecting apparatus

레졸버 디지털 변환장치 및 위치 측정 장치를 제공한다. 본 레졸버 디지털 변환장치는 레졸버에서 출력되는 신호의 오프셋 오차 및 크기 오차를 보상하는 오차 보상부를 포함한다. 이에 따라, 레졸버 디지털 변환장치는 레졸버 출력전압의 크기 오차와 오프셋 전압에 의한 오차가 보상된 위치 데이터를 출력할 수 있게 된다 레졸버, 크기, 오프셋, 오차 A resolver digital converter and a position measuring device are provided. The resolver digital converter includes an error compensator for compensating an offset error and a magnitude error of a signal output from the resolver. Accordingly, the resolver digital converter can output position data in which the magnitude error of the resolver output voltage and the offset voltage are compensated for. Resolver, size, offset, error

Method for position measurement by means of a resolver and a synchro

ASSEMBLY COMPRISING AT LEAST ONE FIRST ENGINE, A SECOND ENGINE AND AN ANGULAR POSITION SENSOR

Un ensemble comportant au moins un premier moteur (10) et un deuxième moteur (20) sur lesquels sont montés respectivement des premières cibles (13) et des deuxièmes cibles (23), les premières cibles (13) et les deuxièmes cibles (23) sont respectivement réparties angulairement sur le première moteur (10) et sur le deuxième moteur (20), chaque première cible (13) comportant une première ouverture angulaire, chaque deuxième cible (23) comportant une deuxième ouverture angulaire, l'ensemble comportant en outre un capteur de position angulaire (5) positionné entre lesdits moteurs (10, 20) et adapté pour mesurer la position angulaire desdites cibles (13, 23). An assembly comprising at least a first motor (10) and a second motor (20) on which first targets (13) and second targets (23) are respectively mounted, the first targets (13) and the second targets (23). are respectively distributed angularly on the first motor (10) and on the second motor (20), each first target (13) having a first angular opening, each second target (23) having a second angular opening, the assembly further comprising an angular position sensor (5) positioned between said motors (10, 20) and adapted to measure the angular position of said targets (13, 23).

LINEAR OR ANGULAR LENGTH MEASUREMENT DEVICE

L'invention concerne des appareils de mesure produisant L'appareil décrit comporte un moyen de mesure produisant des signaux représentant des valeurs angulaires ou linéaires. Dans une mémoire adressable sont stockées des valeurs de correction pour les valeurs mesurées. On peut ainsi produire, à partir d'un synchrotransmetteur à fort pouvoir de résolution mais peu précis, un instrument trés précis. Application : mesures d'angles tres précises. The invention relates to measuring apparatuses producing. The disclosed apparatus comprises a measuring means producing signals representing angular or linear values. Correction values for the measured values are stored in an addressable memory. We can thus produce, from a synchrotransmitter with high resolving power but not very precise, a very precise instrument. Application: very precise angle measurements.

APPARATUS FOR MEASURING LINEAR OR ANGULAR LENGTHS

DEVICE FOR MEASURING THE RELATIVE ORIENTATION OF TWO BODIES AND CORRESPONDING STEERING SYSTEM

DISPOSITIF DU TYPE A COUPLAGE MAGNETIQUE UTILISANT DEUX GROUPEMENTS DE TROIS BOBINES LIES RESPECTIVEMENT AUX DEUX CORPS ET PERMETTANT DE SIMPLIFIER L'ELECTRONIQUE DE TRAITEMENT DES SIGNAUX INDUITS AVANT CALCUL DE L'ORIENTATION RELATIVE. IL COMPORTE DEUX CIRCUITS DE COMMUTATION 3, 7 POUR EXCITER SUCCESSIVEMENT LES BOBINES R1, R2, R3 DU RADIATEUR PAR UNE MEME ONDE SO A SIN WT, ET POUR CONNECTER SEPAREMENT LES BOBINES C1, C2, C3 DU CAPTEUR AUX CIRCUITS DE TRAITEMENT AU COURS DE CHAQUE EXCITATION. LE TRAITEMENT COMPORTE UN CIRCUIT D'AMPLIFICATION 5, UN CIRCUIT DE DEMODULATION SYNCHRONE ET INTEGRATION 7 ET UNE BOUCLE D'ASSERVISSEMENT 8, 10, 9 POUR ANNULER LE SIGNAL RECU S3 ET MESURER LA COMPOSANTE DE CHAMP CORRESPONDANTE. UN CALCULATEUR ANNEXE 8 ELABORE LES ANGLES D'EULER. L'INVENTION S'APPLIQUE NOTAMMENT AUX SYSTEMES VISEURS DE CASQUE. MAGNETIC COUPLING TYPE DEVICE USING TWO GROUPS OF THREE COILS LINKED RESPECTIVELY TO THE TWO BODIES AND ALLOWING TO SIMPLIFY THE ELECTRONICS FOR PROCESSING INDUCED SIGNALS BEFORE CALCULATING THE RELATIVE ORIENTATION. IT INCLUDES TWO SWITCHING CIRCUITS 3, 7 TO SUCCESSIVELY EXCITE THE COILS R1, R2, R3 OF THE RADIATOR BY THE SAME WAVE SO TO SIN WT, AND TO SEPARATELY CONNECT THE COILS C1, C2, C3 OF THE SENSOR TO THE TREATMENT CIRCUITS DURING EVERY EXCITEMENT. THE TREATMENT INCLUDES AN AMPLIFICATION CIRCUIT 5, A SYNCHRONOUS DEMODULATION AND INTEGRATION CIRCUIT 7 AND A SLAVE LOOP 8, 10, 9 TO CANCEL THE RECEIVED SIGNAL S3 AND MEASURE THE CORRESPONDING FIELD COMPONENT. AN APPENDIX 8 CALCULATOR ESTABLISHES THE ANGLES OF EULER. THE INVENTION APPLIES IN PARTICULAR TO HELMET SIGHTING SYSTEMS.

PRECISION TRANSDUCER FOR LINEAR POSITION MEASUREMENTS

Tire pressure sensing system

A monitoring system for monitoring a first parameter includes. a sensor, a receiver and an indicator. The sensor is positioned at a first location and is operable to sense the first parameter. The receiver is positioned at a second location remote from the first location and within proximity to the sensor. The receiver is operable to generate a signal indicative of the first parameter and includes a first inductor, a second inductor and an amplifier having a feedback path. The first inductor and the second inductor are positioned relative to one another to create an electromagnetically coupling between the inductors such that feedback from the coupling is one of either a substantially zero feedback and a negative feedback. The indicator is in communication with the receiver to provide the first parameter to the user. This parameter may include a tire pressure of a tire on a vehicle. The system also includes a tire pressure monitoring system where a sensor is housed within a first housing and a second housing and mounted to a rim of a vehicle. A sensor of the monitoring system also includes an inductor having an inductance L which is positioned relative to a ferrite core. The ferrite core is operable to vary the inductance L of the inductor. The receiver of the system includes an amplifier having a feedback path such that the amplifier is in a waiting non-oscillating mode when the sensor is not electromagnetically coupled to the receiver and in an active oscillating mode when the sensor is electromagnetically coupled to the receiver.

Analog to digital converter

Patent FR2202624A5

Patent FR2020203A1

Device for data processing

APPARATUS FOR INDICATING THE ANGULAR POSITION OF A ROTARY MEMBER

L'INVENTION CONCERNE UN APPAREIL INDICATEUR DE LA POSITION D'UN ORGANE ROTATIF. ELLE SE RAPPORTE A UN APPAREIL DANS LEQUEL LA POSITION D'UN ORGANE ROTATIF INDIQUEE PAR UN RESOLVEUR EST TRANSMISE A DES COMPARATEURS 44 QUI RECOIVENT PAR AILLEURS DES TENSIONS DE REFERENCE PROVENANT DE RESISTANCES REGLABLES 46, CHAQUE COMPARATEUR CORRESPONDANT A UN SEUIL. UNE POSITION DE ZERO EST PROGRAMMEE ET UN CODEUR 48 DE PRIORITE INDIQUE QUELLE EST LA POSITION ANGULAIRE DETECTEE LA PLUS ELOIGNEE DE LA POSITION NOMINALE DE ZERO. APPLICATION A LA DETERMINATION DE LA POSITION D'ORGANES ROTATIFS DE MACHINES-OUTILS. THE INVENTION RELATES TO AN APPARATUS INDICATOR OF THE POSITION OF A ROTARY ORGAN. IT RELATES TO AN APPARATUS IN WHICH THE POSITION OF A ROTARY BODY INDICATED BY A RESOLVER IS TRANSMITTED TO COMPARATORS 44 WHICH ALSO RECEIVE REFERENCE VOLTAGES FROM ADJUSTABLE RESISTORS 46, EACH COMPARATOR CORRESPONDING TO A THRESHOLD. A ZERO POSITION IS PROGRAMMED AND AN ENCODER 48 OF PRIORITY INDICATES WHICH ANGULAR POSITION DETECTED FAREST FROM THE NOMINAL ZERO POSITION IS. APPLICATION TO THE DETERMINATION OF THE POSITION OF ROTARY ORGANS OF MACHINE-TOOLS.

Patent FR2347652B1

METHOD AND DEVICE FOR REDUCING NOISE IN THE TRANSMISSION OF A DIGITAL SIGNAL

L'INVENTION CONCERNE LA TRANSMISSION DE L'INFORMATION. POUR REDUIRE L'INFLUENCE DU BRUIT SUR LE SIGNAL ANALOGIQUE QUI PROVIENT D'UNE SOURCE 10, UN DISPOSITIF DE TRANSMISSION NUMERIQUE COMPORTE NOTAMMENT UNE SOURCE DE SIGNAL DEFINI, 14, DONT LE SIGNAL DE SORTIE EST COMBINE AVEC LE SIGNAL DE LA SOURCE 10 DANS UN RESEAU DE SOMMATION 12. LE SIGNAL OBTENU EST CONVERTI SOUS FORME NUMERIQUE PUIS APPLIQUE AU SUPPORT DE TRANSMISSION 18. APPLICATION AUX RESEAUX TELEPHONIQUES NUMERIQUES. THE INVENTION IS CONCERNED WITH THE TRANSMISSION OF INFORMATION. TO REDUCE THE INFLUENCE OF NOISE ON THE ANALOGUE SIGNAL COMING FROM A SOURCE 10, A DIGITAL TRANSMISSION DEVICE INCLUDES A DEFINED SIGNAL SOURCE, 14, THE OUTPUT SIGNAL OF WHICH IS COMBINED WITH THE SIGNAL OF SOURCE 10 IN A SUMMATION NETWORK 12. THE SIGNAL OBTAINED IS CONVERTED INTO DIGITAL FORM THEN APPLIED TO THE TRANSMISSION SUPPORT 18. APPLICATION TO DIGITAL TELEPHONE NETWORKS.

Analogue-to-digital converter using phase modulation

An ultrahigh-speed analog-to-digital converter that does not use optical signals is implemented by means of simple circuit configurations. To achieve this, phase differences between a carrier and modulated signals are detected, the modulated signals having been obtained by modulating the phase of the carrier with an analog signal. Analog-to-digital conversion is then performed by applying binary weighting to the modulation factors of the phase modulations. Alternatively, different relative delays are applied stepwise in 2 n -1 stages (where n is the resolution) between the carrier and the signal that has been phase modulated by the analog signal. The phase of the signals with these delays and the phase of the signal without any delay are respectively compared in 2 n -1 stages. An n-bit digital signal is formed and output on the basis of the results of these comparisons. The carrier may also be respectively shifted in a plurality of stages n by means of delay elements, and the phases of the outputs of the n phase modulations may be respectively compared with the phase of the carrier. An n-bit digital signal is formed and output on the basis of the results of these comparisons. In this case, the amount of hardware can be decreased by combining this method with the previously described method. High-speed analog-to-digital conversion can be performed in these ways, and improvements in precision, accuracy and operating frequency can be achieved. Noise rejection is excellent, and improved signal quality and conversion efficiency can be obtained.

Method of locating at least one readout element relative to system of coordinate buses

1527391 Position finding CESKOSLOVENSKA AKADEMIE VED 16 Jan 1976 [20 Jan 1975] 01745/76 Heading G1N A device for determining the position of a movable member relative to a fixed area comprises at least one system of conductors 2-14 arrayed in the area, a current distributer for supplying an electric current to the conductors for producing a field of constent flux density within the area, and progamming areas for controlling the current distribution thereby to move the field about the area in accordance with a predetermined program. A sensing means is mounted on the movable member and an evaluation device is connected to the programming device and to the sensing element to give an indication of the position of the sensing element relative to the area. An electrically conductive foil 20 may be interposed between the area and sensor.

Proximity sensor

Näherungssensor mit: – einer ersten Sendespule (S1), – einer zweiten Sendespule (S2); – wenigstens einer Empfangsspule (E); – einer Anregungseinrichtung, die mit der ersten und der zweiten Sendespule (S1, S2) verbunden ist; und – einer Auswerteeinrichtung, die mit zumindest einer Sendespule (S1, S2) und/oder der Anregungseinrichtung sowie mit der wenigstens einen Empfangsspule (E) verbunden ist und ausgebildet ist, um ein Auswertesignal zu erzeugen, das von einer Phasenverschiebung zwischen einem Signal (US) zumindest einer Sendespule (S1, S2) und/oder der Anregungseinrichtung sowie einem Signal (UE) der wenigstens einen Empfangsspule (E) abhängt, wobei das Auswertesignal zumindest näherungsweise proportional zu der Phasenverschiebung ist, und wobei die Sendespulen (S1, S2) so ausgebildet, angeordnet und angeregt sind und die Empfangsspule (E) so ausgebildet und angeordnet ist, dass eine Übertragungsfunktion des Näherungssensors, die eine Beziehung zwischen dem Signal (UE) der Empfangsspule (E) und dem Signal (US) zumindest einer Sendespule (S1,... Proximity sensor comprising: - a first transmitting coil (S1), - a second transmitting coil (S2); - At least one receiving coil (E); - An excitation device, which is connected to the first and the second transmitting coil (S1, S2); and - an evaluation device which is connected to at least one transmitting coil (S1, S2) and / or the excitation device and to the at least one receiving coil (E) and is designed to generate an evaluation signal which is dependent on a phase shift between a signal (US ) of at least one transmitting coil (S1, S2) and / or the excitation device and a signal (UE) of the at least one receiving coil (E), wherein the evaluation signal is at least approximately proportional to the phase shift, and wherein the transmitting coils (S1, S2) so are formed, arranged and excited and the receiving coil (E) is designed and arranged such that a transfer function of the proximity sensor, a relationship between ...

Measurement of a linear variable differential transformer signal by phase conversion

ABSTRACT OF THE DISCLOSURE A measurement system for converting the outputs of dissimilar transducers into digital numbers by means of a phase conversion tech-nique. The outputs of a plurality of dissimilar transducers are gene-rated as pairs of amplitude modulated sinusoidal signals. All AM signal pairs are converted into phase modulated signal pairs by a plurality of identical conversion circuits where the phase difference between at least one PM signal pair is linearly related to the measured parameter of the transducer associated therewith. The phase differ-ences for each transducer is converted into a digital number by count-ing increments of time between the zero crossings of each pair of phase modulated signals and outputting the resulting count to a data buss of a control processor. Transducer parameters which are nonlinearly related to their phase differences are compensated by a correction factor which is calculated by knowing the error between any parti-cular measured input and the linear input.

Magnetic synchro angle resolver

A magnetic synchro second harmonic generator has line voltage bucked out in current summing means, and is synchronously rectified in balanced demodulators utilizing double the line frequency as a reference. Filtering removes remaining odd harmonics, and functions of the sum and difference of the two filtered outputs provide signals comprising quadrature related sine and cosine functions of the desired rotor angle. By sensing the sign of the quadrature components, and which of them has a greater absolute magnitude, all eight octants of a circle can be identified; within each octant, a digital word representing the tangent or cotangent (chosen so that either is always less than one, when used) together with the sign and magnitude bits comprise a complete digital resolution of the angle. The tangent and cotangent are derived by applying the sine and cosine to correct related ones of the signal and reference inputs of an analog to digital converter, to take ratios thereof.

Phase difference detection apparatus, position detection system and method for position detection

Motor control system

An electric motor is described in which a position sensor is provided which generates a plurality of output signals each dependent upon the relative position of the rotor and the stator. These signals are processed to generate a set of commutation control signals for controlling the commutation of the drive current to the stator coils. In one embodiment, a phase shift can be electronically applied to each of the position sensor coils to adjust the timing of the switching in accordance with the motor's current speed and load demands. In another embodiment, these signals are also used in a servo-control loop, in order to control, for example, the speed and/or output torque of the motor.

Time-domain voltage comparator for analog-to-digital converter

A time-domain voltage comparator for an analog-to-digital converter includes a first voltage-to-time converter configured to be connected in series with at least one time delay cell and convert an input voltage into time information; a second voltage-to-time converter configured to be connected in series with at least one time delay cell and convert an input voltage into time information; and a phase comparator configured to determine a difference between times outputted from the first voltage-to-time converter and the second voltage-to-time converter.

Multi-bit function generator

A function generator for use in a synchro to digital (S to D) converter in which successive approximations of the digital output are made by switching between two chains of cascade connected operational amplifiers so that, as one chain is incremented to decrease the error signal appearing at the output of the chain, the other chain is coupled to control the error reduction operation until the aforementioned switching is completed, at which time the chains reverse roles.

Method and apparatus for detecting signal errors in a system for monitoring shaft rotation

(57)【要約】 【課題】単一の回転センサ、特に単一のレゾルバを用いて、軸の回転運動を安全に監視できる装置および方法を提供する。 【解決手段】この発明は、軸（１２）の回転運動を安全に監視するための装置および方法に関する。装置（６０）は、第１および第２の信号（２４、２６）を記録するための測定手段（２２）を備え、第１の信号（２４）は、軸（１２）の第１参照ポイントの角度位置の時間特性に相当し、第２の信号（２６）は、軸（１２）の第２参照ポイントの角度位置の時間特性に相当する。第１および第２の参照ポイントは、軸（１２）の回転角により互いに置き換えられる。さらに、装置（６０）は、第１および第２の信号（２４、２６）の瞬間値を所定の幾何学的関係を用いて互いに比較できるコンパレータを有する評価手段（６２）を備える。

Analog to digital converter

1,133,808. Analogue-digital converters. GENERAL PRECISION SYSTEMS Inc. 17 Feb., 1967 [15 April, 1966], No. 7587/67. Heading G4H. In an analogue-digital converter, sinusoidal signals from a synchro or resolver are demodulated to give D.C. signals representing the angular position of the resolver shaft which are then fed via switching means to an oscillation circuit, the switching means being such that, when closed, the D.C. signals are impressed on the oscillation circuit and when opened an oscillation cycle is started at the impressed voltage value. A zero crossing and a phase detector connected to the oscillation means detects a zero crossing in one of the oscillation cycles to enable a counter to accumulate pulses, the number of pulses accumulated representing the angle of rotation of the shaft. In the embodiment described the fine resolver 1 (Fig. 2) of a two-speed resolver system 1, 2 is first encoded by demodulating the sine and cosine outputs of the resolver and demodulators 9, 10. These are fed through transistor switches 11, 12 opened under the control of a programme counter 35 to allow the D.C. signals to be gated to the oscillator. When switches 18, 22 are closed the outputs of D.C. amplifiers 23, 24 become the negative of their input voltages and when the switches are reopened the oscillator begins to oscillate. The oscillator is allowed to cycle to 180 degrees before the fine encoding cycle begins by the programme counter 35 applying a pulse to gates 33, 39. At the start of the encoding cycle the polarity of the signal in the amplifier 24 is stored in flip-flops 30, 31 and when the signal passes through zero with a negative slope a pulse is supplied to a flip-flop 32 to enable clock pulses to pass through gates 33 to be accumulated in the 6th-19th most significant digit positions in a counter 34. At the end of one cycle of the oscillator, the programme counter 35 terminates the count and closes switches 13, 14 associated with the coarse encoder so that ...

Mean frequency calibration for a voltage controlled oscillator based analog-to-digital converter

A method is provided for calibrating the mean frequency of a voltage controlled oscillator (VCO) based analog-to-digital converter (ADC). The method accepts a differential analog input signal comprising a positive signal and a negative signal. The positive signal is converted into a first frequency and the negative signal is converted into a second frequency. The first frequency is converted into a first digital value and the second frequency is converted into a second digital value. The first digital value is added to the second digital value to find a common mode value, and the common mode value is compared to a predetermined common mode value to find a first error. The first error is converted to a first bias modification of the differential analog input signal, and in response to the differential analog input first bias modification, the first error is minimized.

Method and apparatus for converting analog synchro signals to a signal representative of the status of a mechanical output component

The present invention is directed to a method and apparatus which utilizes a software-based digital signal processing circuit to generate a signal which is representative of the status of a movable component. A preferred embodiment of the apparatus of the present invention includes a synchro which is connected to a movable component. An analog reference excitation may be applied to the synchro, and the synchro generates analog synchro signals which bear a relationship to the status of the movable component. The analog synchro signals are converted to digital synchro signals by a plurality of analog-to-digital converters. A digital reference signal and the digital synchro signals are provided to a software-based digital signal processing circuit which preferably corrects constant and time-varying errors in the digital synchro signals and generates a status signal which is representative of the status of the movable component. For instance, the status signal may represent the angular position of the movable component. A different embodiment of the status signal may represent the angular velocity of the movable component.

Resolver/digital converter

An R/D converter allows high precision detection of a rotation angle of a rotor axis of a resolver having high rates of rotation. An A/D converter is built into a digital signal processor and converts a sine wave and cosine wave output from the resolver. An axis angle calculator calculates tan θ=A((sin ωt)(sin θ))/A((sin ωt)(cos θ)) from A(sin ωt)(sin θ) and A(sin ωt)(cos θ) and further calculates θ=tan −1 θ. The angle space is divided into quadrants and an offset value is set for each quadrant and by adding or subtracting the calculated θ to or from the offset value to form the final angle of the rotor axis of the resolver.

Magnetic absolute non-contact rotary position sensor

Air-core transformer position sensor

An air-core transformer position sensor includes an excitation coil, an output coil, and a sensor coil. The excitation coil is adapted to be electrically excited with an excitation signal. The output coil is inductively coupled to the excitation coil upon electrical excitation of the excitation coil. The sensor coil is electrically shorted, is movable relative to the excitation coil and the output coil and, upon electrical excitation of the excitation coil, is inductively coupled to at least one of the excitation coil or the output coil.

Electromagnetic resolver phase compensation

Phase detection circuit, resolver/digital converter using the circuit, and control system using the converter

A small-sized and low-cost phase detection circuit which has improved noise immunity. The phase detection circuit comprises a multiplier for multiplying an input signal by a reference signal and outputting a first signal, an integration circuit for integrating the first signal and outputting a second signal, a phase estimation circuit for estimating phase information based on the second signal, and a reference signal generation circuit for generating the reference signal based on the estimated phase information. Since the phase is detected based on information representing an entire waveform, the influence of local noise can be diluted and noise immunity can be improved.

Analog to digital converter

An analog to digital converter that is capable of megabit conversion rates operates in the phase domain. The analog voltage to be digitized is first transformed into a corresponding phase angle by angle modulating a high frequency carrier and the conversion is performed on this angle. The output of each stage of the converter is monitored and applied to the next higher order stage to control transitions in that stage. By this means, the conversion accuracy is made independent of the number of bits in the converted signal and is limited only by the accuracy of the stage generating the lowest order bit. Both binary and Gray code representations can be obtained simultaneously.

ROTARY ENCODER PHASE COMPENSATION

Verfahren zum Auswerten eines Ausgabesignals von einem Winkelgeber (20), drehbar gekoppelt mit einem drehbaren Element einer Elektromaschine (10), worin das Verfahren Folgendes umfasst:das Zuführen eines sinusförmigen Erregungssignals an eine Erregerwicklung (23) auf einem Stator (24) des Winkelgebers (20);das dynamische Bestimmen von entsprechenden ersten und zweiten Ausgangssignalen von jeweiligen ersten und zweiten Sekundärwicklungen (25, 26), die auf dem Stator (24) des Winkelgebers (20) angeordnet sind;das Bestimmen einer Vielzahl von Datensätzen, worin jeder Datensatz digitalisierte Zustände des sinusförmigen Erregungssignals und der entsprechenden ersten und zweiten Ausgangssignale beinhaltet;das arithmetische Kombinieren der digitalisierten Zustände des Erregungssignals und der entsprechenden ersten und zweiten Ausgangssignale für jeden der Datensätze,das Bestimmen eines gleitenden Durchschnitts der arithmetisch verknüpften digitalisierten Zustände des Erregungssignals und der entsprechenden ersten und zweiten Ausgangssignaledas Bestimmen eines Phasenverschiebungs-Fehlerausdrucks basierend auf dem gleitenden Durchschnitt; unddas Bestimmen einer Phasenverschiebung zwischen dem sinusförmigen Erregungssignal und den entsprechenden ersten und zweiten Ausgangssignale basierend auf dem Phasenverschiebungs-Fehlerausdruck;dadurch gekennzeichnet, dassder Winkelgeber (20) eine variable Reluktanz aufweist; dassdas Bestimmen eines gleitenden Durchschnitts der arithmetisch verknüpften digitalisierten Zustände des Erregungssignals und der entsprechenden ersten und zweiten Ausgangssignale des Winkelgebers das Bestimmen des gleitenden Durchschnitts für eine einzige Periode des sinusförmigen Erregungssignals beinhaltet und dassdas Bestimmen einer Phasenverschiebung zwischen dem Erregungssignal und den entsprechenden ersten und zweiten Ausgangssignale basierend auf dem Phasenverschiebungs-Fehlerausdruck das Integrieren des Phasenverschiebungs-Fehlerausdrucks beinhaltet. A ...

Dial indicator system

本发明涉及一种用于指示物理参数大小的装置，例如压力、温度或流速，其具有可移动的指针(1)、接收天线(4b，4c)和传输天线(4a)。传输天线(4a)在指针(1)附近产生电磁场，以致在接收天线(4b，4c)内引起电信号。感应元件(3)以电子谐振电路形式连接于指针(1)。感应元件(3)在由传输天线4a产生的电磁场内的移动将影响在接收天线(4b，4c)内产生的电信号，以致在接收天线(4b，4c)内产生的信号可以指示指针的位移。该装置具有的优点是，通过对指针(3)应用简单的无源感应元件，可以构造简单的机械指示器以便实现电读取。

Device for measuring a measurement variable

The invention relates to a device for measuring a measurement variable, comprising an electronic control unit (MK) which is directly connected to a parallel resonant circuit (P; LP, CP) and which is configured to excite the circuit so as to oscillate at an excitation frequency. At least one measuring inductor (LS1. LS2, LS3) is designed to sense the measurement variable and is coupled to the inductor (LP) of the parallel resonant circuit (P). The electronic control unit (MK) has an analog-to-digital converter with a signal input (P4, P5, P6), which is directly connected to the at least one measuring inductor (LS1, LS2, LS3) in order to receive a signal, and a distortion signal generator with an output (P3, D), which is designed to deliver a distortion signal at a reference point (VRP) solely via passive components. The electronic control unit (MK) is configured to receive a respective number of measurement values from the signal of the at least one measuring inductor (LS1, LS2, LS3) in intervals, to analyze the frequency of the measurement values of each interval, and to determine at least one signal characteristic value which indicates the measurement variable at an analysis frequency. The distortion signal is used to increase the precision.

Patent FR2034905A1

MEASURING DEVICE AND METHOD