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Smart Sound Processing for Residual Thickness Estimation using Guided Lamb Waves generated by EMAT

The objective of this paper is to establish signal processing tools for estimating the group and the phase velocity of a given mode in guided Lamb waves, with the objective of analyzing the best configuration for determining the depth of a given defect in a metallic pipe. Studies of the size of the damages with all the extracted parameters are then used to propose estimators of the residual thickness, considering amplitude and phase information. Results demonstrate the suitability of the proposal, improving the estimation of the residual thickness.




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