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《China Wood Industry》 2002-03
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Method of On-line Detecting Wood Surface Defects by Laser

HAN Yu jie 1, ZHU Guo xi 1, Chiaki TANAKA 2 (1.Northeast Forestry University, Harbin 150040, China; 2.Shimane University, Matsue 690 8504,Japan)  
This paper presentes an on line method for detecting crack and knot of planed lumber surface. The system is consisted of a laser sensor which provides scanning signal, a FFT analyser which records a curve and a personal computer which analyses and processes data from FFT analyser. The system could not only distinguish crack and knot of wood surface quickly and accurately, but also calculate size of each defect according to the data from record curve.
【CateGory Index】: TS67
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