Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1991-12-13
1993-05-18
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
2502061, G01N 2186
Patent
active
052123928
ABSTRACT:
Apparatus for sensing linear displacement of an object between first and second locations along an axis is used to sense conditions that can be made to vary displacement of an object in accordance with the condition, such as temperature, pressure and rotary motion. A light beam projected along an incident light path to the object is reflected along a reflective light path by a reflector affixed to the object. A photo-sensor array in the reflective light path intercepts the reflected light beam and produces samples of the intensity of the reflected image at multiple positions along a line across the array. An imager coupled to the array converts the light samples to representative electrical samples. The resultant light intensity information is provided to an electronic processor which determines a first centroid of the reflected image when the object is at a first location and a second centroid when the object is at a second location, and employs the difference between the first and second centroids to determine the displacement of the object.
REFERENCES:
patent: 3173019 (1965-03-01), Wormser
patent: 4065860 (1978-01-01), Linton et al.
patent: 4114035 (1978-09-01), Herzog
patent: 4181851 (1980-01-01), Allen et al.
patent: 4211922 (1980-07-01), Vaerewyck et al.
patent: 4291977 (1981-09-01), Erdmann et al.
patent: 4299103 (1980-10-01), Hipp
patent: 4314761 (1982-02-01), Reymond et al.
patent: 4315690 (1982-02-01), Trocellier et al.
patent: 4625108 (1986-11-01), Nestel et al.
patent: 4709146 (1987-11-01), Reitsema
patent: 4711579 (1987-12-01), Wilkinson
patent: 4767209 (1988-08-01), Johnson
patent: 4792698 (1988-12-01), Pryor
patent: 4893025 (1990-01-01), Lee
patent: 4912337 (1990-03-01), Wilwerding
patent: 4950899 (1990-08-01), Tachibana
Berkcan Ertugrul
Ho Chung-Yih
Tiemann Jerome J.
Yassa Fathy F.
General Electric Company
Nelms David C.
Snyder Marvin
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