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Piezoelectric Transducer(PZT) plays a significant role for intelligent materials and structures for its better coupling compatibility with structures. The amplitude imaging is easily influenced by the grating and side lobes, while the phase imaging is disturbed by several random single-pixel highlighted spots. Considering that the combination of the amplitude and phase information, which can be acquired simultaneously by Hilbert transform, could introduce higher robustness and accurateness of damage detection, the array focused Hilbert holographic imaging method for Lamb wave is proposed. A0 mode and S0 mode are also combined to detect surface and inner defects through the logical operation.

Array focused Lamb wave Hilbert holographic imaging method