NDLI: Signal processing for the guided wave test based on the empirical mode decomposition

Content Provider	IEEE Xplore Digital Library
Author	Jiang Xu Hongfen Xiong Xinjun Wu
Copyright Year	2011
Description	Author affiliation: Key Laboratory of Nondestructive Testing (Nanchang Hangkong University), Ministry of Education, Nanchang, 330063, P R China (Jiang Xu) \|\| School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China (Hongfen Xiong; Xinjun Wu)
Abstract	In order to detect the small defect, the empirical mode decomposition (EMD) method is employed to process the magnetostrictive guided wave testing signal. Firstly, the principle of the EMD is introduced. Then, the experimental setup is developed to obtain guided wave testing signals. Both the prestressing strand and the parallel wire cable have been manufactured grooves in the wires. It is difficult to find the defect signal from the original signal. By means of the EMD, the test signal is decomposed into series of the intrinsic mode functions (IMFs). The small defect signal is enhanced by analyzing the different order of the IMF. It is easy to find the small defect signal in the first mode wave for the prestressing strand. For the parallel wire cables, the second and third mode can be used to find the small defect signal. These test results indicate that the EMD approach can suppress noise effectively and improve the ability of guided wave testing of the small defect.
Starting Page	375
Ending Page	378
File Size	341621
Page Count	4
File Format	PDF
ISBN	9781424481620
e-ISBN	9781424481651
DOI	10.1109/ICECENG.2011.6057057
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-16
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Empirical mode decomposition Magnetostriction Wires Noise Nondestructive testing Signal processing Guided wave Reflection Acoustics Intrinsic mode function Steel Testing
Content Type	Text
Resource Type	Article

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