Electrical indicator having an optical position encoder

Details Electrical indicator having an optical position encoder Electrical indicator having an optical position encoder

1987-12-23

1989-11-07

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Eccentrically pivoted coil

324144, G01R 120, G01R 520, G01R 1130

Patent

active

048795100

ABSTRACT:
An indicator includes an indicating member driving unit, an encoder plate, a rotational position detecting unit, and an indication position control unit. The indicating member driving unit rotates an indicating member mounted on a rotor shaft in accordance with an electrical signal input to cause the indicating member to indicate. The encoder plate rotates in association with the indicating member. The rotational position detecting unit detects an actual indication position of the indicating member on the basis of a rotational amount of the encoder plate. The indication position control unit controls the indication position of the indicating member so that the actual indication position of the indicating member detected by the rotational position detecting unit coincides with an indication position of the indicating member determined in correspondence to the electrical signal input.

REFERENCES:
patent: 4314146 (1982-02-01), Berney

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