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Proceedings Paper

Detection of delamination defect inside timber by sonic IR
Author(s): M. Y. Choi; J. H. Park; W. T. Kim; K. S. Kang
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Paper 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.

Paper Details

Date Published: 17 March 2008
PDF: 4 pages
Proc. SPIE 6939, Thermosense XXX, 69391F (17 March 2008); doi: 10.1117/12.777979
Show Author Affiliations
M. Y. Choi, Korea Research Institute of Standards and Science (South Korea)
J. H. Park, Korea Research Institute of Standards and Science (Korea, Republic of)
W. T. Kim, Kongju National Univ. (South Korea)
K. S. Kang, Korea Research Institute of Standards and Science (South Korea)


Published in SPIE Proceedings Vol. 6939:
Thermosense XXX
Vladimir P. Vavilov; Douglas D. Burleigh, Editor(s)

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