Boots – shoes – and leggings
Patent
1994-05-26
1996-02-13
Chin, Gary
Boots, shoes, and leggings
364559, B62D 500
Patent
active
054916321
ABSTRACT:
A rotary encoder capable of detecting angular rotation of a rotating shaft, and identifying its neutral position without the need for multiple encoder wheels. A magnetoresistive sensor is positioned adjacent the periphery of a single multipole magnet ring attached to a steering wheel shaft. The magnet ring comprises alternating N-pole and S-pole magnetic regions along its periphery, the surface of one of the regions containing a demagnetized portion. The sensor produces a sinusoidal signal as the shaft is rotated, responsive to the passage of the magnetic regions, with a period equal to the passage of two successive magnetic regions adjacent the sensor. The angular position of the shaft which aligns the demagnetized portion adjacent the sensor corresponds to the shaft's neutral position. Aligning of the demagnetized portion adjacent the sensor causes a voltage irregularity within the sensor's otherwise sinusoidal output signal, which is detected by a signal processing circuit.
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Research Disclosure, p. 468, Jun. 1992, #33855, "Sensing Steering Position and Rate with Magnetic Speed Variable Assist System" (Disclosed Anonymously).
Bradley John R.
Eckhardt Dennis C.
Graber David W.
Lin William C.
Pawlak Andrzej M.
Chin Gary
Delco Electronics Corporation
General Motors Corporation
Gorbatoff Timothy G.
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