Bending angle detecting position setting device

Details Bending angle detecting position setting device Bending angle detecting position setting device

1995-08-31

1997-08-26

Trans, Vincent N.

Boots, shoes, and leggings

382141, 356398, G06K 900

Patent

active

056616716

ABSTRACT:
In bending angle detection, a linear projected light image formed on the surface of a workpiece is photographed by a photographing device; the actual inclination angle of a specimen is stored as data in correspondence with the inclination angle and position of the specimen in an image; and the bending angle of the workpiece is obtained by accessing the data, with the inclination angle and position of the linear projected light image in an image produced by photographing. In main straight line extraction, main pixels are obtained from the distribution of the brightness of pixels aligned on specified axes and a main straight line is obtained from a plurality of main pixels. For extracting only a necessary straight line from an image including unnecessary straight lines, the photographing device is so disposed as to photograph a lower bender and a second straight line from the bottom end of the image is extracted. In setting a bending angle detecting position, a potential bending step where the bending angle detection of the workpiece might be performed is calculated from simulation data on the bending state of the workpiece in each bending step.

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patent: 4728195 (1988-03-01), Silver
patent: 4737845 (1988-04-01), Susuki et al.
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patent: 5058177 (1991-10-01), Chemaly
patent: 5490084 (1996-02-01), Okubo et al.
"Automated Optical Inspection of Multilayer Printed Circuit Boards" by W.A. Bentley, SPIE vol. 220, Optics in Metrology and Quality Assurance, 1980, pp. 102-109.
"Automated Visual Inspection Techniques and Applications: A Biblilography" by R. T. Chin, Pattern Recognition, vol. 15, No. 4, 1982, pp. 343-357.

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