Acoustic emission signal harr wavelet denoise research

In order to obtain wood acoustic emission signal waveform. A multi channel acoustic emission signal acquisition system based on NI high-speed data acquisition equipment was constructed. At the same time, a signal wavelet extraction and processing platform based on Lab VIEW software was designed, which can be used to collect, separate, extract the acoustic emission signal, spectral analysis and other basic functions. The system was proved to be effective through the acoustic emission experiment. Through the comparison of three different signal extract ways, further verify the advantages of harr wavelet analysis. As a platform for wood acoustic emission signal acquisition and processing, this system provides the necessary foundation for the processing of wood acoustic emission signal.