Angular position measurement apparatus

Details Angular position measurement apparatus Angular position measurement apparatus

1989-12-14

1990-12-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

338196, G01D 534

Patent

active

049788469

ABSTRACT:
An angular position measurement system including a rotatable mechanism, a potentiometer coupled to the rotatable mechanism and adapted to produce a first output signal indicative of the angular position thereof; a graduated element retaining a plurality of annularly distributed graduations representing different angular positions of the rotatable mechanism, and a detector for producing second output signals in response to alignment thereof with any of the graduations. Also included is a drive for producing relative movement between the graduated element and the detector in response to rotation of the rotatable mechanism so as to render the second output signal indicative of an angular position of the rotatable mechanism and a comparator for comparing the angular positions indicated by the first and second output signals.

REFERENCES:
patent: 2565213 (1951-08-01), Falkenstein
patent: 3234655 (1966-02-01), Skeels et al.

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