Steering position sensor (multi-turn 1440 degrees angle position sensor)
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01B-007/30
G01D-005/14
G01D-005/16
G01M-017/06
출원번호
US-0267383
(2016-09-16)
등록번호
US-9857199
(2018-01-02)
발명자
/ 주소
Narasimhan, Kumaran Sena
Furlong, Gregory
Stolfus, Joel
출원인 / 주소
Honeywell International Inc.
대리인 / 주소
Conley Rose, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
A multi-turn angular position sensor includes a fixed magnet non-rotationally coupled to a fixed structure. A shaft is configured to rotate multiple complete rotations from a reference position, where each complete rotation front the reference position in a rotational direction defines a unique rota
A multi-turn angular position sensor includes a fixed magnet non-rotationally coupled to a fixed structure. A shaft is configured to rotate multiple complete rotations from a reference position, where each complete rotation front the reference position in a rotational direction defines a unique rotation zone of the shaft. Rotatable magnets surround the shaft and are disposed between the shaft magnet and the fixed magnet and are configured to rotate a different number of angular degrees than the shaft magnet. One of the rotatable magnets is a zone sensor magnet that rotates no more than one complete rotation from the reference position. A rotational zone sensor supplies a zone sensor output signal that indicates the unique rotation zone of the shaft. A shaft rotation sensor supplies a shaft rotation output signal representative of a number of angular degrees that the shaft rotates within each unique rotation zone.
대표청구항▼
1. A multi-turn angular position sensor, comprising: a fixed structure;a fixed magnet non-rotationally coupled to the fixed structure;a shaft configured to rotate, relative to the fixed structure, multiple complete rotations from a reference position, each complete rotation from the reference positi
1. A multi-turn angular position sensor, comprising: a fixed structure;a fixed magnet non-rotationally coupled to the fixed structure;a shaft configured to rotate, relative to the fixed structure, multiple complete rotations from a reference position, each complete rotation from the reference position in a rotational direction defining a unique rotation zone of the shaft;a shaft magnet coupled to the shaft and configured to rotate therewith;a plurality of rotatable magnets surrounding the shaft and disposed between the shaft magnet and the fixed magnet, each rotatable magnet configured, upon rotation of the shaft magnet, to rotate a different number of angular degrees than the shaft magnet, the plurality of magnets including a zone sensor magnet that rotates no more than one complete rotation from the reference position when the shaft rotates the multiple complete rotations from the reference position;a rotational zone sensor disposed adjacent the zone sensor magnet, the rotational zone sensor configured to supply a zone sensor output signal that indicates the unique rotation zone of the shaft; anda shaft rotation sensor disposed adjacent the shaft and configured to supply a shaft rotation output signal representative of a number of angular degrees that the shaft rotates within each unique rotation zone. 2. The system of claim 1, wherein: each of the rotatable magnets supplies a magnetic force; andeach rotatable magnet rotates in response to the magnetic force supplied thereto from adjacent magnets. 3. The system of claim 1, wherein the rotational zone sensor comprises a Hall sensor. 4. The system of claim 3, wherein the zone sensor output signal is an analog signal that identifies the unique zone of rotation of the shaft. 5. The system of claim 1, wherein the shaft rotation sensor comprises a 360-degree Hall sensor. 6. The system of claim 5, wherein the 360-degree Hall sensor is disposed adjacent the shaft magnet to sense rotations thereof. 7. The system of claim 1, wherein the shaft rotation sensor comprises an anisotropic magnetic resistive (AMR) array. 8. The system of claim 7, further comprising a sensor magnet coupled to the shaft and rotatable therewith, the sensor magnet disposed adjacent to the AMR array. 9. The system of claim 1, wherein the shaft is configured to rotate N-number of complete rotations from the reference point in each direction, thereby providing (720×N)-degrees of rotational position sensing capability. 10. The system of claim 9, wherein: N is 2; andthe plurality of rotatable magnets is 8. 11. A multi-turn angular position sensor system, comprising: a fixed structure;a fixed magnet non-rotationally coupled to the fixed structure;a shaft configured to rotate, relative to the fixed structure, multiple complete rotations from a reference position, each complete rotation from the reference position in a rotational direction defining a unique rotation zone of the shaft;a shaft magnet coupled to the shaft and configured to rotate therewith;a plurality of rotatable magnets surrounding the shaft and disposed between the shaft magnet and the fixed magnet, each rotatable magnet configured, upon rotation of the shaft magnet, to rotate a different number of angular degrees than the shaft magnet, the plurality of magnets including a zone sensor magnet that rotates no more than one complete rotation from the reference position when the shaft rotates the multiple complete rotations from the reference position;a rotational zone sensor disposed adjacent the zone sensor magnet, the rotational zone sensor configured to supply a zone sensor output signal that indicates the unique rotation zone of the shaft;a shaft rotation sensor disposed adjacent the shaft and configured to supply a shaft rotation output signal representative of a number of angular degrees that the shaft rotates within each unique rotation zone; anda processor coupled to receive the zone sensor output signal and the shaft rotation output signal and configured, upon receipt thereof, to determine rotational position of the shaft. 12. The system of claim 11, wherein: each of the rotatable magnets supplies a magnetic force; andeach rotatable magnet rotates in response to the magnetic force supplied thereto from adjacent magnets. 13. The system of claim 11, wherein: the rotational zone sensor comprises a Hall sensor; andthe zone sensor output signal is an analog signal that identifies the unique zone of rotation of the shaft. 14. The system of claim 11, wherein the shaft rotation sensor comprises a 360-degree Hall sensor disposed adjacent the shaft magnet to sense rotations thereof. 15. The system of claim 11, wherein the shaft rotation sensor comprises: a sensor magnet coupled to the shaft and rotatable therewith; andan anisotropic magnetic resistive (AMR) array disposed adjacent the sensor magnet. 16. A multi-turn angular position sensor system, comprising: a fixed structure;a fixed magnet non-rotationally coupled to the fixed structure;a shaft configured to rotate, relative to the fixed structure, N-number of complete rotations from a reference position in a rotational direction, each complete rotation from the reference position in the rotational direction defining a unique rotation zone of the shaft;a shaft magnet coupled to the shaft and configured to rotate therewith;a plurality of rotatable magnets surrounding the shaft and disposed between the shaft magnet and the fixed magnet, each rotatable magnet supplying a magnetic force, and each rotatable magnet configured, upon rotation of the shaft magnet and in response to the magnetic force supplied thereto from adjacent rotatable magnets, to rotate a different number of angular degrees than the shaft magnet, the plurality of magnets including a zone sensor magnet that rotates no more than one complete rotation from the reference position when the shaft rotates the multiple complete rotations from the reference position;a rotational zone sensor disposed adjacent the zone sensor magnet, the rotational zone sensor configured to supply a zone sensor output signal that indicates the unique rotation zone of the shaft;a shaft rotation sensor disposed adjacent the shaft and configured to supply a shaft rotation output signal representative of a number of angular degrees that the shaft rotates within each unique rotation zone; anda processor coupled to receive the zone sensor output signal and the shaft rotation output signal and configured, upon receipt thereof, to determine rotational position of the shaft. 17. The system of claim 16, wherein: the rotational zone sensor comprises a Hall sensor; andthe zone sensor output signal is an analog signal that identifies the unique zone of rotation of the shaft. 18. The system of claim 16, wherein the shaft rotation sensor comprises a 360-degree Hall sensor disposed adjacent the shaft magnet to sense rotations thereof. 19. The system of claim 16, wherein the shaft rotation sensor comprises: a sensor magnet coupled to the shaft and rotatable therewith; andan anisotropic magnetic resistive (AMR) array disposed adjacent the sensor magnet. 20. A multi-turn angular position sensor, comprising: a fixed structure;a fixed magnet non-rotationally coupled to the fixed structure;a shaft configured to rotate, relative to the fixed structure, multiple complete rotations from a reference position, each complete rotation from the reference position in a rotational direction defining a unique rotation zone of the shaft;a shaft magnet coupled to the shaft and configured to rotate therewith;a plurality of rotatable magnets surrounding the shaft and disposed between the shaft magnet and the fixed magnet, each rotatable magnet configured, upon rotation of the shaft magnet, to rotate a different number of angular degrees than the shaft magnet;a plurality of rotational zone sensors, each of the rotational zone sensors disposed adjacent a different one of the rotatable magnets, the rotational zone sensors configured to supply zone sensor output signals representative of the unique rotation zone of the shaft; anda shaft rotation sensor disposed adjacent the shaft and configured to supply a shaft rotation output signal representative of a number of angular degrees of rotation within the unique rotation zone of the shaft.
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