Crack Signal Denoising using Wavelet Threshold Method

Based on the above time-frequency analysis, it is concluded that the crack signal can be denoised by sequentially decomposing the signal into different frequency bands and applying threshold processing. In this study, the wavelet threshold denoising method is used to process the crack signal. When performing denoising on the signal, the choice of wavelet basis function, decomposition levels, threshold function, etc., has a significant impact on the denoising effect of the signal.