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Proceedings Paper

Wavelet-transform-based method of analysis for ultrasonic NDT signals of MMC adhesive interface
Author(s): Yi Dun; Xiaohong Shi; Zhangsui Xu; Feng Wang
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Paper Abstract

In the ultrasonic non-destructive evaluation (UNDE) of Metal Matrix Composite Structure(MMCs), one problem is that echoes from different interior layers may overlap, causing obscurity or loss of the fault-detection-and-localization information from a particular layer. To address this issue, a wavelet-transform-based approach was adopted to extract features from UNDE data, which in turn were used to estimate the specimen's adhesive properties. Specifically the db3 wavelet (based on the impulse response of the test instrumentation system) was applied to perform the wavelet transform and separate the overlapped echoes. The features thus extracted were found effective in analyzing and identifying the adhesive properties of the specimen concerned. This method of feature extraction is expected to be largely applicable to the UNDE of multi-layer bonded structure.

Paper Details

Date Published: 21 March 2006
PDF: 4 pages
Proc. SPIE 6040, ICMIT 2005: Mechatronics, MEMS, and Smart Materials, 604018 (21 March 2006); doi: 10.1117/12.664214
Show Author Affiliations
Yi Dun, Mechanical Engineering College (China)
Xiaohong Shi, Mechanical Engineering College (China)
Zhangsui Xu, Mechanical Engineering College (China)
Feng Wang, Mechanical Engineering College (China)

Published in SPIE Proceedings Vol. 6040:
ICMIT 2005: Mechatronics, MEMS, and Smart Materials
Yunlong Wei; Kil To Chong; Takayuki Takahashi; Shengping Liu; Zushu Li; Zhongwei Jiang; Jin Young Choi, Editor(s)

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