Paper Title:
The Ultrasonic Signal De-Noising Method Based on an Improved Wavelet Threshold Function
  Abstract

Making use of the advantages of the soft and hard threshold methods proposed by Donoho, this paper presents a deviation variable based on quadratic polynomial and differentiable improvement function, according to the characteristics of the underground water pipe leakage signal. In the paper we constructed the mathematical model of the function, utilized wavelet de-noising algorithm for the collected ultrasonic signal de-noising, compared the de-noising effect by means of the value of Signal to Noise Ratio (SNR) and Mean Squared Error (MSE). Results show that the new function has the better de-noising effect compared with the original threshold function.

  Info
Periodical
Advanced Materials Research (Volumes 230-232)
Edited by
Ran Chen and Wenli Yao
Pages
564-568
DOI
10.4028/www.scientific.net/AMR.230-232.564
Citation
Q. X. Wang, A. H. Dong, "The Ultrasonic Signal De-Noising Method Based on an Improved Wavelet Threshold Function", Advanced Materials Research, Vols. 230-232, pp. 564-568, 2011
Online since
May 2011
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Price
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