Optical position transducer

Details Optical position transducer Optical position transducer

1975-12-17

1978-08-29

Smith, Alfred E.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

33169R, 33174L, 250231R, H01J 314

Patent

active

041106113

ABSTRACT:
A pneumatic powered probe having a rod that extends into contact with the surface of a workpiece to gauge its position includes optics and electronic circuitry for generating a binary signal proportional to the position of the probe end. The circuitry includes a parallel channel optical mask that moves with the rod between a set of light emitting diodes and a set of photo-transistors, both supported on a circuit board. Transistor circuitry supported on the board converts the outputs of the photo-transistors into a binary parallel code which may be transmitted to a remote location upon receipt of an enabling signal by a plurality of gates in the device. The rod is connected to a cylinder which cooperates with a piston fixed to the device housing. Air admitted into the chamber between the piston and cylinder force outward motion of the rod. The optical mask is supported on the cylinder and moves with it relative to the diodes and photo-transistors to generate the position related signal.

REFERENCES:
patent: 3529170 (1970-09-01), Russell
patent: 3658429 (1972-04-01), Zipin
patent: 3842263 (1974-10-01), Kornrumpf et al.
patent: 3855708 (1974-12-01), Tann et al.
patent: 4011448 (1977-03-01), Hordeski

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