Title :
The Application of Wavelet Transform for Lamb Wave Tomography
Author :
Hu Yong ; Xu Chunguang ; Xu Hanhui
Author_Institution :
Sch. of Mech. Eng., Beijing Inst. of Technol., Beijing, China
Abstract :
An application for Lamb Waves Tomography (LWT) was presented using time-frequency analysis. By the interaction of Lamb wave and defects, there would be several modes, which were likely to result in the overlap of echoes in time domain. Based on wavelet transform, in this paper, arrival time of the Lamb waves was extracted accurately in time-frequency domain, and this method facilitated to get wave arrival time of wave energy easier and more accurate than others before. Wavelet transform was a better way to incorporate time-frequency analysis into tomography algorithms in order to improve image quality.
Keywords :
aluminium; image processing; plates (structures); structural engineering computing; surface acoustic waves; time-frequency analysis; tomography; wavelet transforms; Gabor wavelet; Lamb wave tomography; aluminum plate; image quality improvement; time-frequency domain; wavelet transform; Fourier transforms; Image quality; Nondestructive testing; Sensor arrays; Signal processing algorithms; Time frequency analysis; Tomography; Wavelet analysis; Wavelet domain; Wavelet transforms;
Conference_Titel :
Information Science and Engineering (ICISE), 2009 1st International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4909-5
DOI :
10.1109/ICISE.2009.1180
