Local defects are prone to produce on the surface of roll in grinding process, which seriously affect the quality of the steel strip. Identifications of the defects and the sizes of defects are still existing difficult problems. MATLAB wavelet toolbox is used to generate the adaptive wavelet. Agreement between the adaptive wavelet and the Haar, Morlet wavelet and the experimental results validates the effectiveness of the generated adaptive wavelet method. The results not only validate the effectiveness of identifying the defects, but also provide a theoretical support for identifying defects on the surface of roll.
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