Optics: measuring and testing – Document pattern analysis or verification
Patent
1992-05-28
1993-09-14
McGraw, Vincent P.
Optics: measuring and testing
Document pattern analysis or verification
250226, 356328, 356237, G01N 2127, G01N 2190, G06K 968
Patent
active
052453995
ABSTRACT:
An optical inspection system which inspects for the presence of defects in colored labels placed, for example, on the side walls of cylindrical beverage cans. The optical inspection system utilizes a conveyor for conveying the beverage cans in a production line where such beverage cans typically are randomly oriented. The optical inspection system positions an optical head near the beverage cans as they move in the production line without physically interfering or interacting with the movement. The optical head senses a preselected number of different colors which appear in a predetermined field of view of each moving can. The cans being randomly oriented have different portions of the label visible in the predetermined field of view which is fixed in position. The optical head produces analog electrical signals corresponding to the intensity of each sensed color. A computer is utilized to process these analog electrical signals from the optical head. The computer first generates a number of two color signatures based upon the selected number of colors. After sufficient cans have passed the optical head wherein all two color signatures are fully developed, the computer senses the colors from each successive subsequent can and compares it to the generated color signature. If the sensed color pattern falls outside the generated color signatures, then the can fails and an error signal is generated.
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Cutler-Hammer Product Information (Eaton).
Multiple LED, Color Sensing, by Gregory L. Nadolski.
Cormack Robert H.
Davies Jeffrey P.
Wertz Ronald D.
Ball Corporation
McGraw Vincent P.
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