TY - GEN
T1 - Research on combined denoising based on Wavelet packet transform for EMAE signal
AU - Zhang, Chuang
AU - Liu, Suzhen
AU - Yang, Qingxin
AU - Jin, Liang
PY - 2010
Y1 - 2010
N2 - Electromagnetically induced acoustic emission (EMAE) technique is a new nondestructive testing (NDT). It does nondestructive detection with the effect of dynamic electromagnetic loading to generate a stress field stimulating stress waves from the defects. When EMAE is used to detect crack in the metal sheets, the EMAE signal is easy to be disturbed by various sources of noises, and the detectability of defect signals is greatly lowered. Concerning the characteristics of EMAE signal and main noises, a new method composed of Wavelet packet threshold denoising combined with decomposing and recomposing is presented. In order to promote the effect of denoising, it adopts a improved threshold function to denoise. The experimental results show that the denoising method is valid, it can obtain the main characteristic of the original signal and has superior features over the conventional methods and it is applicable in engineering.
AB - Electromagnetically induced acoustic emission (EMAE) technique is a new nondestructive testing (NDT). It does nondestructive detection with the effect of dynamic electromagnetic loading to generate a stress field stimulating stress waves from the defects. When EMAE is used to detect crack in the metal sheets, the EMAE signal is easy to be disturbed by various sources of noises, and the detectability of defect signals is greatly lowered. Concerning the characteristics of EMAE signal and main noises, a new method composed of Wavelet packet threshold denoising combined with decomposing and recomposing is presented. In order to promote the effect of denoising, it adopts a improved threshold function to denoise. The experimental results show that the denoising method is valid, it can obtain the main characteristic of the original signal and has superior features over the conventional methods and it is applicable in engineering.
KW - Electromagnetically induced acoustic emission
KW - Threshold denoising
KW - Threshold function
KW - Wavelet packet combined denoising
UR - https://www.scopus.com/pages/publications/77958127793
U2 - 10.1109/WCICA.2010.5554189
DO - 10.1109/WCICA.2010.5554189
M3 - 会议稿件
AN - SCOPUS:77958127793
SN - 9781424467129
T3 - Proceedings of the World Congress on Intelligent Control and Automation (WCICA)
SP - 6748
EP - 6752
BT - 2010 8th World Congress on Intelligent Control and Automation, WCICA 2010
T2 - 2010 8th World Congress on Intelligent Control and Automation, WCICA 2010
Y2 - 7 July 2010 through 9 July 2010
ER -