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《Computer Measurement & Control》 2006-09
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Study on Multi -Resolution De-noising of Ultrasonic Signal From MMCs Using Wavelet Package Transform

Shi Xiaohong, Xu Zhangsui, Dun Yi, Sun Qinlei (Department of Eletrical Engeering, Ordnance Engineering College, Shijiazhuang 050003, China)  
To eliminate noise in echo signal from MMCs and acquire purity defect signal, a modified method called average energy threshold using wavelet package transform is put forward for signal denoising. The principle of the wavelet package transform to reduce the noise is introduced. This method is incorporated with multi-resolution analysis and reconfiguration to eliminate noise in echo signal. The a-vailability of the method was verified by emulation experimentation and comparison with denoising using wavelet transform. By analysis the meaningfull denoising method to reduce ultrasonic signal is achieved.
【Fund】: 国家自然科学基金资助项目(50475053)。
【CateGory Index】: TB331
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