Detection of delamination defect inside timber by sonic IR

M. Y. Choi; J. H. Park; W. T. Kim; K. S. Kang

doi:10.1117/12.777979

17 March 2008 Detection of delamination defect inside timber by sonic IR

M. Y. Choi, J. H. Park, W. T. Kim, K. S. Kang

Proceedings Volume 6939, Thermosense XXX; 69391F (2008) https://doi.org/10.1117/12.777979
Event: SPIE Defense and Security Symposium, 2008, Orlando, Florida, United States

Abstract

In ultrasound excitation thermography, the injected ultrasound to an object is transformed to heat by thermo-structure effect and internal friction. The advantage of this technique is selectively sensitive to thermally active defects. The appearance of defects, which can be visualized by thermography camera, depends strongly on the method of excitation. In preliminary studies, ultrasonic excitation horns of ultrasonic manufacturing process are widely adopted for a polymer structure. However, it is needed that these horns are modified for improving the defect detection capability. This paper proposes a new ultrasonic excitation horns with tuning fork shape in NDT of wood material. Geometric conditions are optimized by FEA and application results by the developed horn are described and compared with those by a previous horn.

Citation Download Citation

M. Y. Choi, J. H. Park, W. T. Kim, and K. S. Kang "Detection of delamination defect inside timber by sonic IR", Proc. SPIE 6939, Thermosense XXX, 69391F (17 March 2008); https://doi.org/10.1117/12.777979

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