Study on Infrared Thermal Wave Inspection Technology Using Linear Frequency Modulated (LFM) Light Excitation

Abstract:

This paper provides the theory, mathematics analysis and experiments in support of the Infrared thermal-wave inspection on the subsurface defects in a solid using linear frequency modulated light excitation (LFMTWI). The specimen is heated by the heat flux of linear frequency modulation for launching thermal-wave into the sample in a desired range of frequency. The more thermal wave responses characters are obtained, and the IR thermal-wave imaging shows much more advantages for subsurface defects detection. The simulation and experimental results from steel sample are presented in support of this technique.

• Periodical: Advanced Materials Research (Volumes 542-543)
• Pages: 659-662
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.542-543.659
• Online since: June 2012
• Authors: Li Qiang Liu, Jun Yan Liu, Yang Wang
• Keywords: Cross-Correlation, Infrared Imaging, Linear Modulation Frequency

References

[1] X. P. Maldgue, Theory and practice of infrared technology for nondestructive testing (Wiley, Hoboken NJ, 2001)

[2] G. Busse, D Wu and W. Karpen, J. Appl. Phys. 71, 3962 (1992).

[3] X. P. Maldague and S. Marinetti, J. Appl. Phys. 79, 2964 (1996)

[4] R. Mulaveesala and S. Tuli, Appl. Phys. Lett. 89, 191913 (2006).

[5] J. Y. LIU, Y. WANG and J. M. DAI, Infrared Physics & Technology. 53, (2010) P.348.