Wavelet Thresholding Denoising of Laser Cladding Crack Signals Using Db12 Wavelet

By comparing the denoised signal with the original crack signal, a clear distinction is evident. The denoising process, employing Db12 wavelet for a 3-level wavelet decomposition, effectively filters out noise while maintaining the key characteristics of the crack signal. This observation highlights the effectiveness of wavelet thresholding, especially with customized thresholding rules and the hard thresholding function, in denoising laser cladding crack signals and ensuring reliable defect detection.