Piezoelectrics & Acoustooptics, Volume. 42, Issue 1, 132(2020)
A Guided Wave Field Reconstruction Method Based on Compressed Sensing
The guided wave field analysis method can effectively identify and characterize the structural damage, but due to the limitation of Nyquist sampling law, the acquisition of full-wave field signals is often time-consuming. In order to improve the acquisition efficiency of full-wave field signals, the existing methods rely on compressed sensing technology and laser Doppler vibration measurement technology to reconstruct the original wave field with a small number of spatial signals. However, these methods rely on a random jittered sampling strategy, which is difficult to achieve in commercial laser Doppler vibration measurement system. In order to solve this problem, a guided wave field reconstruction method based on uniform sparse sampling strategy is proposed in this paper, and a PZT-excitation/SLDV-sensing experimental platform is constructed to verify this method on an aluminum plate with artificial damage. The experimental results show that the proposed method can reduce the number of space measurement points to less than 10% of Nyquist sampling points, and achieve the same level of reconstruction accuracy and damage imaging accuracy as the existing jittered sampling strategy, which can greatly improve the practicability and efficiency of guided wave field analysis method.
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ZHOU Yang, LUO Ying, XU Chenguang, LI Pengfei. A Guided Wave Field Reconstruction Method Based on Compressed Sensing[J]. Piezoelectrics & Acoustooptics, 2020, 42(1): 132
Received: Jul. 22, 2019
Accepted: --
Published Online: Apr. 21, 2022
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