Title :
A full-field mechanical property mapping reconstruction algorithm with quantitative laser ultrasound visualization system
Author :
Chia-Han Wu ; Sheng-Po Tseng ; Che-Hua Yang
Author_Institution :
Inst. of Mech. & Electr. Eng., Nat. Taipei Univ. of Technol., Taipei, Taiwan
Abstract :
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.
Keywords :
Young´s modulus; acoustic signal processing; acoustic wave velocity; piezoelectric transducers; plates (structures); structural acoustics; ultrasonic propagation; ultrasonic transducers; QLUVS; acoustic wave detection; fast scanning mechanism; full-field inspection; full-field mechanical property mapping reconstruction algorithm; guided wave; inversion algorithm; piezoelectric longitudinal transducer; plate-Iike structures; pulsed laser generated acoustic waves; quantitative inspection; quantitative laser ultrasound visualization system; signal processing; two dimensional scanning goal; velocity map; Heating; Laser theory; Steel; Visualization; Analytical model; Full-field inspection; Inversion algorithm; Mechanical property mapping; Quantitative laser ultrasound visualization system;
Conference_Titel :
Ultrasonics Symposium (IUS), 2012 IEEE International
Conference_Location :
Dresden
Print_ISBN :
978-1-4673-4561-3
DOI :
10.1109/ULTSYM.2012.0063
