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

Xiao Li Zhu; Ze Zhang

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

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 52-54Research of Filtering Algorithm for Echo of...

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

Abstract:

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:

Applied Mechanics and Materials (Volumes 52-54)

Pages:

1212-1217

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.52-54.1212

Citation:

Cite this paper

Online since:

March 2011

Authors:

Xiao Li Zhu, Ze Zhang

Keywords:

Signal Denoising, Threshold Function, Ultrasonic Echo Signal, Wavelet Transformation

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