Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6954744 | Mechanical Systems and Signal Processing | 2018 | 16 Pages |
Abstract
The ultrasonic guided wave has emerged as a promising tool for structural health monitoring (SHM) and nondestructive testing (NDT) due to their capability to propagate over long distances with minimal loss and sensitivity to both surface and subsurface defects. The dispersion effect degrades the temporal and spatial resolution of guided waves. A novel ultrasonic guided wave processing method for both single mode and multi-mode guided waves dispersion compensation is proposed in this work based on compressed sensing, in which a dispersion signal dictionary is built by utilizing the dispersion curves of the guided wave modes in order to sparsely decompose the recorded dispersive guided waves. Dispersion-compensated guided waves are obtained by utilizing a non-dispersion signal dictionary and the results of sparse decomposition. Numerical simulations and experiments are implemented to verify the effectiveness of the developed method for both single mode and multi-mode guided waves.
Keywords
Related Topics
Physical Sciences and Engineering
Computer Science
Signal Processing
Authors
Cai-bin Xu, Zhi-bo Yang, Xue-feng Chen, Shao-hua Tian, Yong Xie,