Wavelet-transform-based method of analysis for ultrasonic NDT signals of MMC adhesive interface

Yi Dun; Xiaohong Shi; Zhangsui Xu; Feng Wang

doi:10.1117/12.664214

21 March 2006 Wavelet-transform-based method of analysis for ultrasonic NDT signals of MMC adhesive interface

Yi Dun, Xiaohong Shi, Zhangsui Xu, Feng Wang

Proceedings Volume 6040, ICMIT 2005: Mechatronics, MEMS, and Smart Materials; 604018 (2006) https://doi.org/10.1117/12.664214
Event: ICMIT 2005: Merchatronics, MEMS, and Smart Materials, 2005, Chongqing, China

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.

Citation Download Citation

Yi Dun, Xiaohong Shi, Zhangsui Xu, and Feng Wang "Wavelet-transform-based method of analysis for ultrasonic NDT signals of MMC adhesive interface", Proc. SPIE 6040, ICMIT 2005: Mechatronics, MEMS, and Smart Materials, 604018 (21 March 2006); https://doi.org/10.1117/12.664214

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available