System and method for the detection of bluestain and rot on wood
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United States of America Patent
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N/A
Issued Date -
Mar 16, 2006
app pub date -
Aug 8, 2005
filing date -
Aug 6, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system for detecting bluestain and rot in wood in a wood processing plant including a conveyor for conveying a piece of wood through a scanning area includes a scanning unit comprising a plurality of scanners arranged to scan a face of the piece of wood in a direction perpendicular to a conveying direction. Each of the scanners include a light for illuminating a point on the piece of wood; a collector for collecting light reflected from the piece of wood; a splitter for splitting the collected light into at least two beams; a filter for filtering out of each of the beams a wavelength associated with each of the beams, each of the wavelengths being different; a collector for collecting the filtered light, the collector being adapted to output a signal related to an intensity of the filtered light; and a comparator for comparing the output of each of the collector, the comparator being adapted to output a signal when a ratio between the signal between each of the collector exceeds a predetermined threshold.
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