摘要
小波分析技术以其多分辨率的突出特点成为目前超声信号时频表达的最佳分析方法,被广泛应用于超声信号的降噪处理。分析了小波技术用于超声降噪的理论基础和基本过程,基于国内外小波降噪的应用研究成果,从母小波和分解层数的选择以及小波系数非线性处理方法两个方面论述了小波分析在超声检测信号处理中的应用。
Wavelet analysis has become the best analysis method in the expression of time-frequency in ultrasound signals by its salient features of multi-resolution,and has been widely used in de-noising of ultrasonic signal.This paper analyses the theoretical foundation and the basic process of wavelet analysis used in ultrasonic de-noising.Based on the application research results of wavelet de-noising at home and abroad,this paper also discusses the application of wavelet analysis in ultrasonic testing signal processing in two respects which are the choice of the mother wavelet and decomposition level and the selection of the non-linear processing approach of wavelet coefficients.
出处
《电焊机》
北大核心
2010年第7期77-80,共4页
Electric Welding Machine
关键词
超声检测
小波分析
信号降噪
ultrasonic testing
wavelet analysis
signal de-noising
