A liquid crystal thermography calibration with true color image processing |
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Authors: | Yu Rao Shusheng Zang Minghai Huang |
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Institution: | Institute of Turbomachinery,School of Mechanical and Power Engineering,Shanghai Jiao Tong University,Shanghai 200240,China |
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Abstract: | Liquid crystal thermography is a high-resolution,non-intrusive optical technique for full-field temperature measurement.We present the detailed calibration data for the thermochromic liquid crystal(TLC)with a usefill range of 41-60 ℃.The calibration is done with true color image processing by using an isothermal calibrator.The hue-temperature curve of the TLC is obtained,and the measurement uncertainty is analyzed.Combined with the image noise reduction technique of a 5×5 median filter,the measurement accuracy of the liquid crystal thermography can be significantly improved by approximately 57.1%. |
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