IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0289370
(1994-08-11)
|
우선권정보 |
GB-0016851 (1993-08-13) |
발명자
/ 주소 |
- Ironside John M. (Birmingham GB2) Williams Andrew J. S. (West Midlands GB2)
|
출원인 / 주소 |
- Lucas Industries Public Limited Company (West Midlands GB2 03)
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
0 |
초록
▼
A torque sensor, or relative angular movement sensor, capable of measuring the angular displacement of a component in a power-assisted steering system, comprises an input member coupled to one end of a torsion bar, an output member coupled to another end of the torsion bar, LED light sources, a pair
A torque sensor, or relative angular movement sensor, capable of measuring the angular displacement of a component in a power-assisted steering system, comprises an input member coupled to one end of a torsion bar, an output member coupled to another end of the torsion bar, LED light sources, a pair of photodetector units adapted to receive light from the LED light sources, and signal processing means adapted to receive output signals from the photodetector units, the output signals of the photodetector units being dependent upon the light signals which they receive, and wherein the signal processing means is adapted to produce a modified output signal which closely matches and is representative of the angular position of a chosen portion of the torsion bar. The signal processing comprises various stages in which the output signals from the photodetector units are processed to generate possible estimates of the instantaneous position of the chosen portion of the torsion bar and the best estimate is calculated and processed to provide a complete position estimate representing the angular position of the chosen portion relative to an arbitrarily chosen zero position.
대표청구항
▼
An angular position sensor comprising an input member, a torsion bar with a first end, a second end, and means for predetermining a chosen portion of said torsion bar, said chosen portion being a portion of one of said first and second ends of said torsion bar, said chosen portion for determining an
An angular position sensor comprising an input member, a torsion bar with a first end, a second end, and means for predetermining a chosen portion of said torsion bar, said chosen portion being a portion of one of said first and second ends of said torsion bar, said chosen portion for determining an angular position, of said torsion bar, said input member connected to said first end of said torsion bar and an output member coupled to said second end of said torsion bar, emitter means, said emitter means for generating a first signal and a second signal, first receiver means for receiving said first signal, second receiver means for receiving said second signal, said first and second receiver means generating a first and second output signal respectively, said output signals being dependent upon the first and second signals received by said receiver means, and signal processing means for receiving said output signals, said signal processing means processing said output signals so as to produce a modified output signal, said modified output signal being representative of the angular position of said predetermined chosen portion of said torsion bar, a first aperture containing mask rotatable with said input member, a second aperture containing mask rotatable with said output member, means for mounting said mask adjacent to each other for relative angular movement through a range of angular. positions including an arbitrarily chosen zero position, measuring means for measuring said angular position on a substantially continuous scale, with a resolution of less than one mask aperture pitch of said mask associated with one of said input and output members, and relative to said chosen zero position.
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