A full-field mechanical property mapping reconstruction algorithm with quantitative laser ultrasound visualization system

This research employs a quantitative laser uItrasound visualization system (QLUVS) for the full-field mechanical property mapping in plate-Iike structures. The QLUVS has the advantage of fast, full-field and quantitative inspection. The QLUVS uses a pulsed laser generate acoustic waves with fast scanning mechanism to reach 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 velocity map can be extracted. Finally the analytical model and inversion algorithm will be integrated into QLUVS for the full-field mechanical property mapping purpose.