电磁声发射信号的压缩与重构处理

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Abstract Electromagnetically induced acoustic emission (EMAE) is a new technique of nondestructive testing, it can electromagnetically load to the metal components and generate the acoustic emission signal, which can be used to test metal components according to the result of signal processing. For acquiring the location and size of the defect, it needs to repeatedly load which will generate a lot of data. The theory of compressed sensing was introduced to compress and reconstruct the acoustic emission (AE) and EMAE signals based on orthogonal matching pursuit (OMP). The different measurement numbers were selected to contrast the result on signal reconstruction. The reconstruction effect was analyzed on the waveform and spectrum. Experimental results show that it can be achieved to compress the EMAE signals by using the method of compressed sensing and the measured number is exponential decaying with the reconstruction error and in direct proportion to the reconstruction time. Based on an overall consideration of various factors, the EMAE signal can obtain higher efficiency of reconstruction when the measured number is 8~10 times of the signal sparseness.

Key words： Electromagnetically induced acoustic emission nondestructive testing compressive sensing signal reconstruction

Received: 06 April 2016 Published: 12 May 2017

PACS:

TN911.7

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	Articles by authors
	Zhang Chuang
	Jiang Pan
	Liu Suzhen
	Yang Qingxin
	Li Fubiao

Cite this article:

Zhang Chuang,Jiang Pan,Liu Suzhen等. Compression and Reconstruction Processing of the Electromagnetically Induced Acoustic Emission Signal[J]. Transactions of China Electrotechnical Society, 2017, 32(9): 121-128.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I9/121

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