11 April 2013 Hybrid imaging of damage progress in composites through thermal imaging and embedded sensing
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Abstract
In this paper, we investigate the fusion of imaging data from pulsed phase thermography (PPT) with local temperature data obtained from embedded fiber Bragg grating (FBG) sensors for non-destructive evaluation of composite structures. We use the square pulse heating applied for the PPT imaging as the input thermal wave for both the imaging and sensing processes. In addition, the role of the local microstructure surrounding the FBG on the measured wavelength shift as a function of temperature is derived analytically. Fusing the FBG wavelength response with the PPT data at the corresponding pixel and depth is shown to provide a unique characterization of the local material condition.
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S. Pawar, S. Pawar, K. Peters, K. Peters, } "Hybrid imaging of damage progress in composites through thermal imaging and embedded sensing", Proc. SPIE 8693, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2013, 869307 (11 April 2013); doi: 10.1117/12.2010016; https://doi.org/10.1117/12.2010016
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