C115 近赤外カメラを用いたsub-mm厚さの水の温度イメージング(温度計測)

概要

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We report a method using near-infrared camera and optical filter to obtain the temperature image of sub-millimeter-thick water. The measurement principle is based on the fact that the peak wavelength of the water absorption band with its center near 1440nm shifts with changes in temperature. Temperature images can be constructed by calculating absorbances near 1412nm, which most strongly depend on temperature, for all pixels. We first calibrated the temperatures of 0.5-mm-thick water over the temperature range from 26.0℃ to 40.0℃. The average of temperature coefficients obtained was 1.46×10^<-3> absorbance/℃. Finally, we formed the temperature distribution in this water film by heating an immersed nichrome wire and obtained sequential temperature images demonstrating the distribution.
社団法人日本機械学会の論文
2007-11-23