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Vol. 192, Issue 9, September 2015, pp. 74-80




Non-destructive Testing of Wood Defects Based on Discriminant Analysis Method

Wenshu LIN and Jinzhuo WU

College of Engineering and Technology, Northeast Forestry University, Harbin 150040, China
Tel.: (86) 0451-82191853, fax: (86) 0451-82190631

E-mail: linwenshu@126.com, jinzhuo2009@gmail.com


Received: 16 July 2014 /Accepted: 31 August 2014 /Published: 30 September 2015

Digital Sensors and Sensor Sysstems


Abstract: The defects of wood samples were tested by the technique of stress wave and ultrasonic technology, and the testing results were comparatively analyzed by using the Fisher discriminant analysis in the statistic software of SPSS. The differences of defect detection sensitivity and accuracy for stress wave and ultrasonic under different wood properties and defects were concluded. Therefore, in practical applications, according to different situations the corresponding wood non- destructive testing method should be used, or the two detection methods are applied at the same time in order to compensate for its shortcomings with each other to improve the ability to distinguish the timber defects. The results can provide a reference for further improvement of the reliability of timber defects detection.


Keywords: Wood sampling, Defect, Stress wave, Ultrasonic, Discriminant analysis method.


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