Acoustic emission signal source localization on plywood surface with cross-correlation method

作者：Li, Yang; Yu, Shuai-Shuai; Dai, Li; Luo, Ting-Fang; Li, Ming^*

来源：Journal of Wood Science, 2018, 64(2): 78-84.

DOI：10.1007/s10086-017-1672-x

• Plywood surface
• LabVIEW
• Acoustic emission
• Wavelet analysis
• Cross-correlation location

The high-speed data acquisition equipment which is based on NI and LabVIEW software was used to establish the acoustic emission (AE) signal collection platform, and adopted wavelet analysis method to extract the weak of AE signal waveform from noise, aiming at the localization of AE source on plywood surface. The signal cross-correlation analysis method is used to determine the time difference between the AE signals and the different sensors,so that further calculates the average propagation speed of AE signal on the plywood surface. A kind of AE signal source localization method which is based on the cross-correlation method was proposed according to the principle of geometric positioning, and verified by means of the testing experiment which selected the lead break to simulate AE source. This paper has shown that wavelet analysis can effectively extract AE signal waveform, and the localization method based on cross-correlation principle can precisely calibrate the position of AE signal source.

• 出版日期2018-4
• 单位西南林业大学