Automatic wane detector

Details Automatic wane detector Automatic wane detector

G - Physics

01

B

340/124.5

G01B 11/00 (2006.01) B27B 31/06 (2006.01) G01B 11/02 (2006.01)

Patent

CA 1120128

JPD/1m 3/6/79 2 251 A-1 AUTOMATIC WANE DETECTOR Abstract Plural scanners are employed for detecting the surface features of a wood cant preparatory to sawing the cant into one or more boards. A scanner includes a radiation detector disposed above the cant on the wane side thereof, and a radiation source below the cant whereby the edges of the cant may be detected. A further pair of radiation sources are also located above the cant on the wane side thereof in angular relation to the detector for producing radiation beams which intersect the detection path of the detector only at a surface level corresponding to a predetermined acceptable wood thickness, as distinguished from the forward and rearward wanes. The wanes are detected as the region between detector illumination by the source below the cant, and de- tector illumination from the pair of sources above the cant.

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