Effect of driving frequency on non-linear coupling between ultrasound transducer and target under inspection in Sonic Infrared Imaging |
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| Institution: | 1. VR/AR Research Center, Korea Electronics Technology Institute, 8 Floor, 11, World cup buk-ro 54-gil, Mapo-gu, Seoul, South Korea;2. Institute of Optical Materials and Technologies to Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl 109, P.O.Box 95, Sofia 1113, Bulgaria;1. Department of Engineering Mechanics, CNMM & AML, Tsinghua University, Beijing 100084, China;2. School of Civil Engineering, The University of Sydney, Sydney, NSW 2006, Australia |
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| Abstract: | Sonic Infrared (IR) Imaging, also referred as vibrothermography, is a novel Nondestructive Evaluation (NDE) technology to find cracks through infrared imaging of vibration-induced crack heating. The vibration source plays an important role in the detection of cracks. In this paper, the effect of driving frequency on the ultrasound vibration to the thermal imaging is presented. The research is organized by using different frequency system and coupling materials on the same aluminum bar sample. The analysis is conducted by combination of the vibration waveforms with the IR images and signals. Correlation analysis between the acoustic energy and the thermal energy in the crack is discussed as well. |
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| Keywords: | Crack detection Sonic Infrared imaging NDE Non-linear coupling Driving frequency |
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