Device for sensing the direction of motion

Details Device for sensing the direction of motion Device for sensing the direction of motion

1974-05-22

1976-03-16

Smith, Alfred E.

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

324175, G01P 352, G01P 336

Patent

active

039449238

ABSTRACT:
A device for sensing and indicating the direction of motion of a moving member. A discontinuity is formed on a moving member. Two sensors capable of detecting the discontinuity are spaced apart a distance less than the width of the discontinuity. Logic circuitry determines which sensor detection occurs before both sensors produce coincident detections. The sensor detection occurring before coincidence unambiguously indicates the direction of motion. A gating circuit produces an output signal for one direction of motion and a second signal for the opposite direction of motion.

REFERENCES:
patent: 3264639 (1966-08-01), Lerman et al.
patent: 3299702 (1967-01-01), Hulme
patent: 3313945 (1967-04-01), Clinton
patent: 3728565 (1973-04-01), O'Callaghan
patent: 3783339 (1974-01-01), Matty
J. Kumar, V. Kumar, A. Gupta, "On RPM and AF Meter," J. Inst. Eng. (India) Electron. & Telecommun. Eng. Div., Vol. 52, No. 7 (Mar. 1972).

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