Electronic system for detecting direction of motion

Details Electronic system for detecting direction of motion Electronic system for detecting direction of motion

1978-06-05

1979-06-05

Heyman, John S.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

328166, 324 83Q, 324 86, G01R 1914, H03K 520

Patent

active

041575075

ABSTRACT:
Apparatus for detecting the direction of motion from a reference signal, R, and a quadrature signal, Q, derived from the output signals X+0 and X+90 of a position transducer, wherein the polarity of the reference signal alternates with every fixed increment of motion of a transducer and the quadrature signal which maintains phase difference of +90.degree. or -90.degree. with respect to the reference signal depending on the direction of motion, is comprised of: digital means for producing a narrow pulse, P, at each low-to-high transition of the quadrature signal and a narrow pulse, N, at each high-to-low transition of the quadrature signal; means for determining the direction of motion from these narrow pulses and the reference signal once during each half cycle of the reference signal, and means for storing this direction information until a subsequent determination is made in order to provide a continuous signal indicating the direction of motion.

REFERENCES:
patent: 2971086 (1961-02-01), Feijoo et al.
patent: 3069623 (1962-12-01), Mugio
patent: 3233180 (1966-02-01), Eddy
patent: 3501701 (1970-03-01), Reid
patent: 3579268 (1971-05-01), Steiger
patent: 3588710 (1971-06-01), Masters

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