Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1998-11-12
1999-11-23
Font, Frank G.
Optics: measuring and testing
By polarized light examination
With light attenuation
356379, G01B 1124, G01B 1128
Patent
active
059910410
ABSTRACT:
A method and apparatus for measuring the length, width, and height of rectangular solid objects moving on a conveyor. The apparatus includes a light curtain, two laser triangulation range finders, and a pulse tachometer mounted on a frame around a conveyor. As an object is conveyed through the frame, measurements from each of the sensors are correlated by a digital computer to estimate the length, width and height of the object. The method and apparatus does not require a break in the surface of the conveyor, and is insensitive to object placement and orientation on the conveyor.
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Font Frank G.
PSC Inc.
Stafira Michael P.
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