Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1982-12-13
1985-09-17
Rosenberger, R. A.
Optics: measuring and testing
By polarized light examination
With light attenuation
83365, 250571, 356384, G01N 2122
Patent
active
045417229
ABSTRACT:
An edging system for sawing cants into boards includes a contour line scanner for profiling the cant and determining the combination of board widths of a specified grade which will yield the greatest economic return based on current prices. A pair of fan-like lasers positioned along a conveyor project coplanar lines of light onto the side faces of the cant to form contour lines characterizing the widthwise position and shape of the side faces. An X-Y axis TV camera is positioned above the cant for raster scanning the cant widthwise (X-axis) at close lengthwise (Y-axis) intervals along the cant to detect the contour line. The camera output signal is digitized and input to a microcomputer programed to convert the signal to pairs of digital numbers corresponding to the contour line positions at each interval. Two parallel sawlines are fit between the contour lines, one sawline touching one contour line and the second sawline touching or near the second contour line. Board values, tabulated by grade, width and length of the boards, are stored in the computer memory and used to evaluate possible combinations of standard width boards that can be cut between the contour lines for selecting the combination providing the greatest value. The elevation of the lines of light and the board values used in computing total lumber values are jointly varied for different grades of lumber.
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JENKSystems, Inc.
Rosenberger R. A.
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