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17 April 2013 Signal processing for the inspection of immersed structures
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In this paper, we present a non-destructive inspection method for immersed waveguide. A laser operating at 532 nm is used to excite leaky guided waves on an aluminum plate immersed in water. The plate has a few artificial defects. An array of immersion transducers is used to detect the propagating waves. A signal processing based on continuous wavelet transform is utilized to extract a few damage-sensitive features that are used in an outlier analysis and in a probabilistic-based imaging method. The experimental results show that the proposed system can be used for the inspection of underwater waveguides.
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Elisabetta Pistone, Abdollah Bagheri, Kaiyuan Li, and Piervincenzo Rizzo "Signal processing for the inspection of immersed structures", Proc. SPIE 8695, Health Monitoring of Structural and Biological Systems 2013, 86951A (17 April 2013);

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