Incremental encoder rotational position detector

Details Incremental encoder rotational position detector Incremental encoder rotational position detector

1982-01-18

1987-01-20

Krawczewicz, Stanley T.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

34087037, G08C 1910

Patent

active

046382496

ABSTRACT:
An incremental encoder rotational position detecting apparatus for detecting the incremental rotational position of a rotating member includes a rotatable disk plate rotated with the rotating member, a stationary disk plate opposite to the rotatable plate, and a detector circuit for supplying a rectangular signal to the stationary plate. The stationary plate has first, second, third and fourth electrodes and an earth electrode grounded. The earth electrode is arranged between the first electrode and the third electrode to reduce a distribution capacitance produced between the first and third electrodes. The rectangular signals with opposite phase to each other are applied between the first and second electrodes or the third and fourth electrodes of the stationary plate.

REFERENCES:
patent: 3668672 (1972-06-01), Parnell
patent: 3760392 (1973-09-01), Stich
patent: 3873916 (1975-03-01), Sterki
patent: 3938113 (1976-02-01), Dobson et al.
patent: 3961318 (1976-06-01), Farrand
patent: 4092579 (1978-05-01), Weit
patent: 4199800 (1980-04-01), Weit
patent: 4350981 (1982-09-01), Tanaka
patent: 4418347 (1983-11-01), Tanaka et al.
patent: 4418348 (1983-11-01), Tanaka et al.
patent: 4423417 (1983-12-01), Tanaka et al.

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