【摘要】 根据声发射信号的特点及实际应用中对声发射信号分析的需要,提出了一套声发射信号小波分析的小波基选取规则方法,根据提出的选择方法从常用的小波基中选出较适合声发射信号分析的几种,再通过对仿真的声发射信号进行分析得到结论:Daubechies小波、Symlets小波和Coiflets小波是适合于声发射信号分析的小波基.最后通过对能反映源特征的频带信号进行重构,这样能更好更有效的提取声发射信号的本质特征.更多还原

【Abstract】 At first,the rules how to select the suitable wavelets for acoustic emission signal processing were proposed based on the features of acoustic emission signal and the the application of wavelet analysis.Secondly,we chose several kinds of wavelets which are much fit for the acoustic emission from the common wavelets,and we drew the conclusion that Daubechies wavelet,Symlets wavelet and Coiflets wavelet were regarded to be suitable for acoustic emission.At last,we recomposed some frequency band of wavelets,and the results can efficiently extract the features of acoustic emission signal.更多还原