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Laser-Ultrasonics Application for Non-Contact and Non-destructive Evaluation of Structure  

Kim Jae-Yeal (조선대학교 기전공학과)
Song Kyung-Seok (조선대학교 광응용공학과)
Yang Dong-Jo (조선대학교 정밀기계공학과)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.14, no.4, 2005 , pp. 49-54 More about this Journal
Abstract
Measuring defects on the inside and on the surface of a steel structure is very important technology in order to predict the life span of the structure. In particular, a place with a high probability that it may contain defects is a welded part and it is very important to check defects in the part, absence/presence of non-uniform substances, its shape, and the location. Many non-destructive tests can be applied, but the ultrasonic flow detection test is widely used with some advantages. The ultrasonic flow detection test, however, cannot be applied when there is a problem by a contact medium between PZT and a specimen, in case of a small and complicated shape or a moving object or when the specimen is hot. In this study, to solve the problems of the contact ultrasonic flow detection test, the non-contact ultrasonic flow detection test for sending/receiving ultrasonic waves using lasers was described. I intended to develop a non-destructive detection system applying the laser application ultrasonic test to a steel structure by detecting the defects inside of and on the surface of the specimen.
Keywords
Non-destructive; Laser generated ultrasonic; Fabry-Perot interferometer; Non-contact;
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