Fast Inversion Calculation for Full-field Measurement of Material Properties with Quantitative Laser Ultrasound Visualization System
نویسندگان
چکیده
This research employs a nondestructive, rapid, high accuracy and full-field material characterization platform which integrates quantitative laser ultrasound visualization system (QLUVS) with mechanical property mapping reconstruction algorithm. The QLUVS uses a pulsed laser generate acoustic waves with fast scanning mechanical to research two dimensional scanning goal and then detected with a piezoelectric longitudinal transducer. By utilizing QLUVS, the spatial and temporal information of guided wave can be obtained with further signal processing. The theoretical models including guided waves propagating along single-layered plate, two-layered plate, surface wave for single-layered system and for two-layered system and signal processing including 2D spatial data interpolation, window shifting and 2D fast Fourier transform (2D FFT) will be integrated into mechanical property mapping reconstruction algorithm. The QLUV system combined with mechanical property mapping reconstruction algorithm provides qualitative and quantitative study for more complex guided mode propagating behavior and a full-field mechanical property mapping
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