Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1991-11-13
1993-05-18
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356375, G01N 2186
Patent
active
052123910
ABSTRACT:
A non-contact, laser detection system for detecting the extended state of an object in continuous motion such as a drill bit. In the drill bit embodiment, the detected states are clean, clogged and broken In the laser detection system, a first signal, indicative of energy reflected from the surface of the drill bit, is digitized and compared to a first threshold A second signal, indicative of amplified energy reflected from the drill bit, is digitized and compared to a second threshold. The digital signals are analyzed by a computer to detect the state of the drill bit.
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Broken Tool Indicator Service Manual, Rev. C, Excellon Automation, Torrance, California, Jul. 1987, pp. 2-1, 4-1 to 4-3.
Excellon Automation
Nelms David C.
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