9 March 2014 On the processing of leaky guided waves propagating in immersed plates
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Abstract
We present a non-destructive inspection method for the structural health monitoring of underwater structures. 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 namely vertical notch, horizontal notch, corrosion, and small hole. An array of five immersion transducers arranged in half-circle is used to detect the propagating waves. A signal processing technique is implemented to assess the presence of damage; the method is based on continuous wavelet transform to extract a few damagesensitive features fed to an artificial neural network for damage classification. The experimental results show that the proposed system can be employed for the inspection of underwater plates.
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Abdollah Bagheri, Abdollah Bagheri, Piervincenzo Rizzo, Piervincenzo Rizzo, Elisabetta Pistone, Elisabetta Pistone, } "On the processing of leaky guided waves propagating in immersed plates", Proc. SPIE 9064, Health Monitoring of Structural and Biological Systems 2014, 90640W (9 March 2014); doi: 10.1117/12.2042255; https://doi.org/10.1117/12.2042255
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