Research of Filtering Algorithm for Echo of Ultrasonic Wave Based on Wavelet Transformation

Abstract:

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This paper proposes an improved wavelet threshold denoising method, threshold function by selecting different thresholds to filter out the noisy signal. Firstly, do the wavelet transformation for noisy signal, and then use soft threshold, hard threshold and the improved threshold algorithm to denoising the signal, finally realized by Matlab simulation of wavelet thresholding. Threshold denoising via different methods of simulation experiments show that the improved threshold denoising algorithm can effectively filter plate bonding ultrasonic echo signal in the noise detection and can be a good feature to retain the original signal.

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Periodical:

Edited by:

Zhou Mark

Pages:

1212-1217

DOI:

10.4028/www.scientific.net/AMM.52-54.1212

Citation:

X. L. Zhu and Z. Zhang, "Research of Filtering Algorithm for Echo of Ultrasonic Wave Based on Wavelet Transformation", Applied Mechanics and Materials, Vols. 52-54, pp. 1212-1217, 2011

Online since:

March 2011

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$35.00

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