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公开(公告)号：US11860203B2
公开(公告)日：2024-01-02
申请号：US17488474
申请日：2021-09-29
发明人： Rafael Giolbas , Marius Gloger , David Witts
IPC分类号： G01R25/00
CPC分类号： G01R25/00
摘要： A dual channel differential can include a first channel, the first channel configured to produce a first component signal, and a second channel that is independent from the first channel, the second channel configured to produce a second component signal. The sensor can include a sensing circuit configured to obtain the first component signal and the second component signal, the first component signal having a first polarity and the second component signal having a second polarity, the second polarity opposing the first polarity, determine a first cross-channel differential signal based at least in part on the first component signal and the second component signal, and provide the first cross-channel differential signal as a first output of the dual channel differential sensor.
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公开(公告)号：US20230228598A1
公开(公告)日：2023-07-20
申请号：US18186016
申请日：2023-03-17
发明人： Timothy Biggs , David Witts
CPC分类号： G01D5/2053 , H01F27/28
摘要： A position sensor is provided. The position sensor includes a target and a segment sensor element. The segment sensor element defines a circumferential direction and a radial direction. The segment sensor element includes a transmit coil. The segment sensor element includes a plurality of receive coils positioned within a space defined by the transmit coil. The plurality of receive coils are offset relative to one another. The shape of each of the plurality of receive coils corresponds to a periodic waveform having a radial width that varies along the circumferential direction. Furthermore, the shape of at least one receive coil of the plurality of receive coils is distorted along at least one of the radial direction or the circumferential direction.
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公开(公告)号：US11698275B2
公开(公告)日：2023-07-11
申请号：US17048149
申请日：2018-05-29
发明人： David Witts , Timothy Biggs , Paul Smith , Peter Constantinou
IPC分类号： G01D5/22
CPC分类号： G01D5/225
摘要： In one example implementation, a rotary position sensor can include a first member and a second member, one of the first and second members having a transmit aerial and a receive aerial and the other of the first and second members having an intermediate coupling element. The receive aerial has at least one receive conductive winding arranged to form a first set of current loops and a second set of current loops. The intermediate coupling element comprises a conductive material arranged in a pattern. The pattern of the intermediate coupling element and the layout of the first and second set of current loops are mutually arranged such that any electromotive force induced in the first set of current loops by a background magnetic field is substantially balanced by an electromotive force induced in the second set of current loops by the background magnetic field.
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公开(公告)号：US12078481B2
公开(公告)日：2024-09-03
申请号：US17106729
申请日：2020-11-30
发明人： Robert Wood , Peter Constantinou , David Witts
CPC分类号： G01B7/30 , G01D5/20 , H05K7/1417
摘要： An inductive sensor includes a first circuit board having a sensor element configurable in a plurality of different coil configurations. The sensor element includes a transmit coil and a plurality of receive coils. The first circuit board includes interconnect points positioned at a same location on the first circuit board for each of the plurality of different coil configurations. The inductive sensor includes a second circuit board spaced apart from the first circuit board along the axial direction. The second circuit board includes processing circuitry associated with the sensor element and configurable in a plurality of different configurations. The second circuit board includes interconnect points positioned at a same location on the second circuit board for each of the configurations of the processing circuitry. Furthermore, each interconnect point on the second circuit board is aligned with a corresponding interconnect point on the first circuit board along circumferential and radial directions.
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公开(公告)号：US12013300B2
公开(公告)日：2024-06-18
申请号：US18313019
申请日：2023-05-05
发明人： David Witts , Paul Smith
摘要： A torque sensor can be configured to detect the positions of rotor targets relative to the position of respective receiver structures. A torque sensor can include an oscillator circuit coupled to an excitation coil. The oscillator circuit can be configured to generate a periodic voltage signal and energize the excitation coil with the periodic voltage signal. The inductive torque sensor can include a stator circuit board including receivers with receiver structures that are periodically repeated. The inductive torque sensor can include rotor targets coupled to respective rotors, the rotor targets can be configured to affect the strength of the inductive coupling between the excitation coil and the respective receivers. The inductive torque sensor can include processing circuitry configured to provide signals associated with positions of the rotor targets relative to their respective receiver structures.
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公开(公告)号：US11988528B2
公开(公告)日：2024-05-21
申请号：US18186016
申请日：2023-03-17
发明人： Timothy Biggs , David Witts
CPC分类号： G01D5/2053 , H01F27/28
摘要： A position sensor is provided. The position sensor includes a target and a segment sensor element. The segment sensor element defines a circumferential direction and a radial direction. The segment sensor element includes a transmit coil. The segment sensor element includes a plurality of receive coils positioned within a space defined by the transmit coil. The plurality of receive coils are offset relative to one another. The shape of each of the plurality of receive coils corresponds to a periodic waveform having a radial width that varies along the circumferential direction. Furthermore, the shape of at least one receive coil of the plurality of receive coils is distorted along at least one of the radial direction or the circumferential direction.
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公开(公告)号：US11772629B2
公开(公告)日：2023-10-03
申请号：US17388740
申请日：2021-07-29
发明人： David Witts , Olivier Pajona , Markus Frädrich , Stefan Ruhl , Stephane Proust , Jaakko Kyllonen , Jonathan Hayes
IPC分类号： B60W50/00 , B60W10/198 , G01S13/10
CPC分类号： B60W10/198 , G01S13/10 , B60W2050/0057 , B60W2510/0604 , B60W2720/106
摘要： A system for sensing a position of a first member relative to a second member based on a radio frequency characteristic of a bias member is disclosed. The bias member may be configured to bias the second member relative to the first member. Radio frequency circuitry may be configured to apply a radio frequency signal to the bias member and provide one or more signals indicative of a position of the first member relative to the second member based on a radio frequency characteristic of the bias member.
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公开(公告)号：US20240011800A1
公开(公告)日：2024-01-11
申请号：US18349556
申请日：2023-07-10
发明人： David Witts , Timothy Biggs , Paul Smith , Peter Constantinou
IPC分类号： G01D5/22
CPC分类号： G01D5/225
摘要： Rotary position sensors are provided. In one example implementation, a rotary position sensor can include a first member and a second member, one of the first and second members having a transmit aerial and a receive aerial and the other of the first and second members having an intermediate coupling element. The receive aerial has at least one receive conductive winding arranged to form a first set of current loops and a second set of current loops. The intermediate coupling element comprises a conductive material arranged in a pattern. The pattern of the intermediate coupling element and the layout of the first and second set of current loops are mutually arranged such that any electromotive force induced in the first set of current loops by a background magnetic field is substantially balanced by an electromotive force induced in the second set of current loops by the background magnetic field.
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公开(公告)号：US20230152481A1
公开(公告)日：2023-05-18
申请号：US18154410
申请日：2023-01-13
发明人： David Witts , Peter Constantinou , Paul Smith
CPC分类号： G01V3/081 , G01D5/2258 , H01F21/10 , G01D5/20 , G01D5/145
摘要： Inductive position sensors for sensing relative position (e.g., relative rotary position) between members are provided. In one example implementation, the inductive position sensor includes a transmit aerial having at least one transmit winding. The inductive position sensor can include a receive aerial having one or more receive windings. The inductive position sensor can include a coupling element operable to be disposed on the second member. The inductive position sensor can include processing circuitry configured to provide one or more signals indicative of the position of the first member relative to the second member based on current induced in the one or more receive windings resulting from an oscillating signal provided to the transmit winding. The inductive position sensor includes at least one electrostatic shield. The electrostatic shield can include a plurality of conductive traces arranged so that no current loops are formed in the electrostatic shield.
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公开(公告)号：US12074479B2
公开(公告)日：2024-08-27
申请号：US17090225
申请日：2020-11-05
IPC分类号： H02K11/225 , G01D5/20 , H02K11/25
CPC分类号： H02K11/225 , G01D5/2073 , H02K11/25
摘要： A sensor assembly for an electric machine includes a position sensor mounted to the stator. The sensor assembly further includes a target configured to be inductively coupled to a transmit coil of the position sensor and a plurality of receive coils of the position sensor when the target passes the position sensor during a revolution of the rotor relative to the stator. The sensor assembly includes a circuit mounted to the rotor. The sensor assembly further includes a power generation element on the rotor. The power generation element generates electrical power needed for powering electronic components of the circuit based on an inductive coupling with the transmit coil when the power generation element passes the position sensor during the revolution of the rotor. The electronic components can include a sensor configured to obtain data that can be communicated to the position sensor mounted to the stator.
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