The ultrasonic signal de-noising method based on an improved wavelet threshold function

摘要：

　　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.

关键词： Wavelet Threshold De-noising SNR MSE

作者: Qingxuan Wang Aihua Dong

作者单位: School of electrical engineering & automation, Henan polytechnic university, Jiaozuo, Henan,454000, China

会议类型: 国际会议

会议名称: the 2011 International Conference on Frontiers of Manufacturing Science and Measuring Technology (第一届制造科学与检测技术国际会议(ICFMM2011))

会议地点: 重庆

会议语种:英文

页码: 564-568

在线出版日期: 2011-06-23（万方平台首次上网日期，不代表论文的发表时间）