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http://dx.doi.org/10.7779/JKSNT.2014.34.6.435

Guided-Wave Tomographic Imaging of Plate Defects by Laser-Based Ultrasonic Techniques  

Park, Junpil (Graduuate School, School of Mechanical Engineering, Pusan National University)
Lim, Juyoung (Graduuate School, School of Mechanical Engineering, Pusan National University)
Cho, Younho (School of Mechanical Engineering, Pusan National University)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.34, no.6, 2014 , pp. 435-440 More about this Journal
Abstract
Contact-guided-wave tests are impractical for investigating specimens with limited accessibility and rough surfaces or complex geometric features. A non-contact setup with a laser-ultrasonic transmitter and receiver is quite attractive for guided-wave inspection. In the present work, we developed a non-contact guided-wave tomography technique using the laser-ultrasonic technique in a plate. A method for Lamb-wave generation and detection in an aluminum plate with a pulsed laser-ultrasonic transmitter and Michelson-interferometer receiver was developed. The defect shape and area in the images obtained using laser scanning, showed good agreement with the actual defect. The proposed approach can be used as a non-contact online inspection and monitoring technique.
Keywords
Guided Wave; Non-Contact Guided Wave; Tomography; Laser Ultrasonics;
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Times Cited By KSCI : 1  (Citation Analysis)
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