1 April 2015 Crack visualization of metallic structures in wide area using time-domain reflectometry with two-dimensional microstrip lines
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Abstract
The present study investigated crack visualization in metallic structures using time-domain reflectometry with a two-dimensional microstrip line. 2D inspection was enabled by covering the inspected structure surface with the microstrip conductor to compensate for the lack of information in the transverse direction. Crack visualization experiments were conducted using the proposed TDR with single ended of 2D MSL for different crack length. The experimental results demonstrated that crack propagation could be clearly visualized. However, false cracks appeared at the same position regardless of the crack position. The electromagnetic field simulation results clarified that the false cracks observed in the experiments were caused by cross talk. The problem can be eliminated by arranging the microstrip conductor appropriately.
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M. Kawasaki, R. Matsuzaki, Akira Todoroki, "Crack visualization of metallic structures in wide area using time-domain reflectometry with two-dimensional microstrip lines", Proc. SPIE 9437, Structural Health Monitoring and Inspection of Advanced Materials, Aerospace, and Civil Infrastructure 2015, 94372K (1 April 2015); doi: 10.1117/12.2083823; https://doi.org/10.1117/12.2083823
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