-
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.
-
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.
-
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.
-
公开(公告)号：US11703359B2
公开(公告)日：2023-07-18
申请号：US16868587
申请日：2020-05-07
发明人： Paul Smith , Robert Wood , John Simm , Timothy Biggs
IPC分类号： G01D5/20
CPC分类号： G01D5/2013
摘要： An inductive position sensor may be configured to detect relative position between a first member and a second member. The inductive position sensor may include an inductive sensor element configured to be coupled to the first member and a screening layer formed over a screened portion of a member surface of the second member such that an exposed portion of the member surface is free of the screening layer. The screening layer may be configured to reduce an effect on induced signals in the inductive sensor element caused by the screened portion of the second member.
-
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.
-
公开(公告)号：US12013264B2
公开(公告)日：2024-06-18
申请号：US17286119
申请日：2018-10-16
发明人： David Witts , Peter Constantinou , Paul Smith , Timothy Biggs , Andrew Parker
CPC分类号： G01D5/2053 , G01B7/003
摘要： Position sensing apparatus is provided. In one example implementation, the position sensing apparatus comprises a first member having an excitation conductive winding and a detection conductive winding formed thereon, and a second member having a resonant circuit formed thereon. An integrated circuit comprising excitation signal generation and detection signal processing circuitry is arranged to generate an alternating excitation signal at a resonant frequency of the resonant circuit and to process an alternating detection signal induced in the detection conductive winding as a result of a magnetic field generated by the alternating excitation signal flowing through the excitation conductive winding, and the excitation conductive winding and the detection conductive winding are arranged so that the detection signal varies in dependence on the relative position of the first and second member. Phase-shift circuitry is arranged to introduce a phase shift to one of the excitation signal and the detection signal such that the excitation signal output by the integrated circuit and the detection signal input to the detection circuit are in phase or in anti-phase with each other.
-
公开(公告)号：US11921251B2
公开(公告)日：2024-03-05
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 , G01D5/145 , G01D5/20 , G01D5/2258 , H01F21/10
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.
-
公开(公告)号：US20230273080A1
公开(公告)日：2023-08-31
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.
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.015 秒)
