Study on Method of Magnetic Flux Leakage Signals De-Noising for Cracks of Bar

Hong Chun Sun; Yong Fa Xia; Yue Cheng Deng

doi:10.4028/www.scientific.net/AMM.148-149.757

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 148-149Study on Method of Magnetic Flux Leakage Signals...

Study on Method of Magnetic Flux Leakage Signals De-Noising for Cracks of Bar

Abstract:

During bars manufacturing and using process, the use of bars with cracks influenced the service life and sustainable work, on the premise of certain detection system, the choose of signal de-noising method plays an important part in magnetic flux leakage testing process, for which determining the global performance of testing equipment. This paper studies on magnetic flux leakage signals characteristic of cracks on the bar, analyzed the advantages and disadvantages of wavelet analysis and wavelet packet threshold de-noising, and on this basis, in order to give consideration to both the low and high frequency interference signal removing, adopted an integration method that combines wavelet packet threshold de-noising, wavelet packet decomposition and wavelet reconstruction, which greatly improved signal processing results.

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Periodical:

Applied Mechanics and Materials (Volumes 148-149)

Pages:

757-761

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.148-149.757

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Online since:

December 2011

Authors:

Hong Chun Sun, Yong Fa Xia, Yue Cheng Deng

Keywords:

Crack, De-Noising, Magnetic Flux Leakage (MFL), Signal Processing

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