Translational position sensing apparatus employing rotating elem

Details Translational position sensing apparatus employing rotating elem Translational position sensing apparatus employing rotating elem

1990-11-07

1992-07-21

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250211K, 250229, G01D 534

Patent

active

051325314

ABSTRACT:
An optoelectronic position-sensitive detector (PSD) is disposed within a protective housing. An operator is movably mounted to the housing to be mechanically displaced by an object whose position is being sensed. A light projector within the housing is moved in response to operator movement to move a narrow light beam along a surface of the PSD corresponding to the position of the operator. A control system receives signals from the two output terminals of the PSD, compares and processes the same and produces a single analog signal indicative of the position of the object. The operator may be axially reciprocally movable or rotatable, and may have direct or indirect coupling with the light projector.

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patent: 4938062 (1990-07-01), Shimizu et al.

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