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

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 8127
Author(s):  
Weilei Mu ◽  
Yuqing Gao ◽  
Guijie Liu

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.

2020 ◽  
Vol 58 (7) ◽  
pp. 4529-4546
Author(s):  
Ekaterina Shipilova ◽  
Michel Barret ◽  
Matthieu Bloch ◽  
Jean-Luc Boelle ◽  
Jean-Luc Collette

2011 ◽  
Vol 57 (8) ◽  
pp. 5326-5341 ◽  
Author(s):  
Zakria Hussain ◽  
John Shawe-Taylor ◽  
David R. Hardoon ◽  
Charanpal Dhanjal

2013 ◽  
Vol 61 (2) ◽  
pp. 398-410 ◽  
Author(s):  
Jie Ding ◽  
Laming Chen ◽  
Yuantao Gu

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