Rotational position detector

Details Rotational position detector Rotational position detector

1979-04-12

1981-12-08

Groody, James J.

Communications: electrical

Continuously variable indicating

With particular transmitter

310168, 324208, 324174, 324 60CD, 340347P, G08C 1906, G01B 700

Patent

active

043050727

ABSTRACT:
A single sensor is located close to a ring gear on the periphery of which teeth are disposed equiangularly except at an angular reference position. When the ring gear rotates, the sensor generates output signals, with the period of the output pulse which corresponds to the reference position being larger than that of the other output pulses which correspond to the angular positions. A capacitor is charged during half of each the periods of the output pulses, so that the reference position can be discriminated by comparing the amplitude of the charged voltage or the discharging period of the capacitor with a predetermined value.

REFERENCES:
patent: 3132337 (1964-05-01), Martin
patent: 3728565 (1973-04-01), O'Callaghan
patent: 3832635 (1974-08-01), Cass
patent: 3876927 (1975-04-01), Gee et al.
patent: 3930201 (1975-12-01), Ackermann et al.
patent: 4072893 (1978-02-01), Huwyler
patent: 4181884 (1980-01-01), Shirasaki et al.

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