Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1986-12-10
1988-06-28
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250239, 356445, G01N 2186, G01N 2155, G01V 904, H01J 502
Patent
active
047541482
ABSTRACT:
An apparatus and method for quantitatively evaluating the finish of a curved surface of a rolling mill roll or a coil of strip. A light beam is directed by the position of a support housing at a specific incident angle onto the curved surface and a plurality of light detectors are positioned by the support housing above the curved surface for measuring the intensity of reflected light in various directions as defined by the positions of the light detectors. The housing is positioned by stabilizing arms at opposite sides of the housing so that the housing and stabilizing arms form three points of contact with the curved surface. A roller with journals at opposite ends is supported by each stabilizing arm. The longitudinal axes of the rollers are parallel to the longitudinal axis of the roll or coil of strip so that the light beam travels in a plane which is also parallel to longitudinal axis of the roll or coil of strip. An electrical circuit is coupled to the light detectors for calculating the value of specular reflectance as well as reflected light at various angles thereto.
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Barkowski Lawrence R.
Kazeva Richard
Kim Yeong-U
Allegheny Ludlum Corporation
Messinger Michael
Nelms David C.
Viccaro Patrick J.
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