Electro-optic apparatus for measuring the speed of angular rotat

Details Electro-optic apparatus for measuring the speed of angular rotat Electro-optic apparatus for measuring the speed of angular rotat

1977-10-11

1979-10-30

Rolinec, Rudolph V.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

250237G, 356374, 356138, G01P 336, G01C 906

Patent

active

041729943

ABSTRACT:
Apparatus for measuring the speed of rotation of a wheel or the angular orientation thereof relative to a fixed point. A first portion of a transmitter unit is positioned along the periphery of the wheel and a second portion of the transmitter unit is positioned at a stationary location outside of the wheel. The two portions of the transmitter unit together from one or more lined screens which, when one is viewed through the other, create a moire interference pattern. Optical means are provided to read the interference pattern created as the wheel is moved to thereby determine the speed or angular orientation thereof.

REFERENCES:
patent: 2390122 (1945-12-01), Powers
patent: 3175093 (1965-03-01), De Lang
patent: 3553469 (1971-01-01), Stutz et al.
patent: 3657551 (1972-04-01), Lingert et al.
patent: 3693023 (1972-09-01), Wasserman

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