Affiliation:
1. Taiyuan University of Science and Technology
2. Taiyuan University of Science
3. Jinan University
Abstract
In this paper, a wavelet-based pipeline inspection method was illustrated experimentally. Piezoelectric ceramic (PZT5), as sensors, was used to generate and receive the guided wave signal. To be specific, a piezoelectric ring was an excitation sensor in order to generate L(0,2) mode guided wave and 16 evenly distributed piezoelectric patches in pipe circle were the reception sensors. A transverse artificial notch in the pipe wall could be detected successfully by the guided wave. For reducing the noise from the testing signal, a wavelet-based denoise technique was proposed Based on the denoised signal, both location and size of the defect could be identified. The result shows that the crack size identification was in good agreement with the theoretical prediction.
Publisher
Trans Tech Publications, Ltd.
Reference10 articles.
1. Alleyne D, Lowe M, Cawley P. J. Appl. Mech. 65: 635-41, (1998).
2. Liu ZH, He CF, Yang XM, et. al. Chin. J. Mech. Eng. (42), 3, 171-178, 2006. (in Chinese).
3. Lee JH, Lee SJ. NDT&E International 42: 222-227, (2009).
4. Wu B, Deng F, He CF. J. BJUT 33(4): 342-348, 2007. (in Chinese).
5. Zhang WW, Wang ZH, Ma HW. J. Jinan U. (Natural Science). 30(3): 269-272, 2009. (in Chinese).