Volume 30 Issue 04
Apr.  2004
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Guo Xingwang, Vavilov V, Guo Guangping, et al. Modeling and image processing in infrared thermographic NDT of composite materials[J]. Journal of Beijing University of Aeronautics and Astronautics, 2004, 30(04): 363-369. (in Chinese)
Citation: Guo Xingwang, Vavilov V, Guo Guangping, et al. Modeling and image processing in infrared thermographic NDT of composite materials[J]. Journal of Beijing University of Aeronautics and Astronautics, 2004, 30(04): 363-369. (in Chinese)

Modeling and image processing in infrared thermographic NDT of composite materials

  • Received Date: 15 Nov 2003
  • Publish Date: 30 Apr 2004
  • Infrared thermographic non-destructive testing(IT NDT) was increasingly used in the inspection of composite materials due to large surface,rapid and noncontact testing capabilities. The modeling and thermal image processing of the IT NDT of carbon fibre reinforced plastic(CFRP) were researched here. A new mathematical model was proposed for the CFRP reference samples with Teflon inserts, and the simulation was carried out; The causes of the phenomenon that the temperature on defects appears colder than the background were analyzed; The discrepancy between the experimental and the expected results was overcome. Many advanced data processing methods in the inspection of CFRP samples were used to deal with the infrared image sequences. Several processing algorithms were statistically evaluated to demonstrate that the Fourier transformation and the correlation technique can provide the highest values of signal-to-noise ratio.

     

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