Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-12-14
1989-09-26
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
73654, G01D 534
Patent
active
048702714
ABSTRACT:
A method and apparatus for determining the length of bearing defects along the direction of rolling, including also a transducer system with high frequency (10,000 HZ) capability for detecting and measuring the displacement and/or vibration of objects placed in contact therewith. The system includes a reflective cantilever spring which serves as the target for reflecting incident light and vibrating in unison with a contacted object. Fiber optics guide light from a light source to the target and back to a signal generator. A crowned cylindrical ruby tip provides the ojbect contacting surface and is biased by the cantilever spring. The light guiding fiber optics and cantilever are sealed from the hostile environment of the transducer.
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