Denoiseing method for acoustic emission testing of tank bottom based on cross-correlation analysis

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Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (8) : 178-180.

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Denoiseing method for acoustic emission testing of tank bottom based on cross-correlation analysis

WANG Wei-kui1;SUN Li-ying2;ZENG Zhou-mo1;JIN Shi-jiu1;DU Gang1

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Abstract

During the process of acoustic emission(AE) testing on tank bottom, due to the characteristics of the method, a lot of noise signals would be collected, which would seriously affect the evaluation accuracy of the tank bottom's corrosion degree. Therefore, various approaches have been developed to reduce the noise signals. However, it is hard for them to reduce the virtually located AE events. To solve this problem, a denoising method was proposed. The treatment result of the actual data by using the method shows that it could reduce the virtually located AE events effectively so as to make the evaluation result be more in line with the real situation.

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acoustic emission(AE) / tank bottom testing / correlation analysis

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WANG Wei-kui;SUN Li-ying;ZENG Zhou-mo;JIN Shi-jiu;DU Gang . Denoiseing method for acoustic emission testing of tank bottom based on cross-correlation analysis[J]. Journal of Vibration and Shock, 2010, 29(8): 178-180