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Ultrasonic nondestructive testing for wood defects is studied based on the energy spectrum variety of the ultrasonic signals by means of wavelet transform, coefficient of wavelet node and the artificial neural networks (ANN). The energy change of defect wood specimen mostly depends on the degree of defects. And the defect degree is proportional to the energy change. By comparing the energy variety...
Wood nondestructive detection technology is a new interdisciplinary technology, which has been successfully applied in wood production, wood processing, wood structure detection and many other fields. In the paper, ultrasonic nondestructive testing for wood defects is studied based on the energy spectrum variety of the ultrasonic signals by means of wavelet transform, coefficient of wavelet node and...
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