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Article

Ultrasound Defect Localization in Shell Structures with Lamb Waves Using Spare Sensor Array and Orthogonal Matching Pursuit Decomposition

by 1,2, 1 and 1,*
1
Engineering College, Ocean University of China, Qingdao 266100, China
2
Suzhou Academy, Xi’an Jiaotong University, Suzhou 215123, China
*
Author to whom correspondence should be addressed.
Academic Editor: Zenghua Liu
Sensors 2021, 21(23), 8127; https://doi.org/10.3390/s21238127
Received: 11 November 2021 / Revised: 1 December 2021 / Accepted: 2 December 2021 / Published: 4 December 2021
Lamb waves have multimodal and dispersion effects, which reduces their performance in damage localization with respect to resolution. To detect damage with fewest sensors and high resolution, a method, using only two piezoelectric transducers and based on orthogonal matching pursuit (OMP) decomposition, was proposed. First, an OMP-based decomposition and dispersion removal algorithm is introduced, which is capable of separating wave packets of different propagation paths and removing the dispersion part successively. Then, two simulation signals, with nonoverlapped and overlapped wave packets, are employed to verify the proposed method. Thereafter, with the proposed algorithm, the wave packets reflected from the defect and edge are all separated. Finally, a sparse sensor array with only two transducers succeeds in localizing the defect. The experimental results show that the OMP-based algorithm is beneficial for resolution improvement and transducer usage reduction. View Full-Text
Keywords: Lamb wave; modal separation; damage imaging Lamb wave; modal separation; damage imaging
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MDPI and ACS Style

Mu, W.; Gao, Y.; Liu, G. Ultrasound Defect Localization in Shell Structures with Lamb Waves Using Spare Sensor Array and Orthogonal Matching Pursuit Decomposition. Sensors 2021, 21, 8127. https://doi.org/10.3390/s21238127

AMA Style

Mu W, Gao Y, Liu G. Ultrasound Defect Localization in Shell Structures with Lamb Waves Using Spare Sensor Array and Orthogonal Matching Pursuit Decomposition. Sensors. 2021; 21(23):8127. https://doi.org/10.3390/s21238127

Chicago/Turabian Style

Mu, Weilei, Yuqing Gao, and Guijie Liu. 2021. "Ultrasound Defect Localization in Shell Structures with Lamb Waves Using Spare Sensor Array and Orthogonal Matching Pursuit Decomposition" Sensors 21, no. 23: 8127. https://doi.org/10.3390/s21238127

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