G - Physics – 01 – D
Patent
G - Physics
01
D
73/69, 340/135.6
G01D 5/16 (2006.01) G01D 5/244 (2006.01) G01D 5/245 (2006.01) G01P 3/487 (2006.01)
Patent
CA 1287985
Abstract In apparatus for magnetically detecting the position or speed of a moving body, magnetic poles with a pitch .lambda. are arranged on the peripheral surface of a drum rotated in accordance with the movement of the body. A magnetic sensor is located opposite these poles. This sensor is formed of two magnetoresistive element pairs that are spaced from each other at .lambda./6, with the two elements in each pair being spaced from each other by .lambda./2. The two elements in each pair are connected in series to form a bridge circuit. The signals obtained from nodes of the circuit are differentially amplified. By this arrangement the third harmonic components can be eliminated, and a signal obtained having no distortion and representative of the position or speed of the moving body.
531268
Kawamata Syooichi
Miyashita Kunio
Takahashi Tadashi
Yamashita Seizi
Hitachi Ltd.
Kawamata Syooichi
Kirby Eades Gale Baker
Miyashita Kunio
Takahashi Tadashi
LandOfFree
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