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http://dx.doi.org/10.46670/JSST.2021.30.1.36

Temperature Compensation of Nondispersive Infrared Gas Senor: Infrared Light Absorbance  

Yi, SeungHwan (College of Convergence Technology, Korea National University of Transportation)
Publication Information
Journal of Sensor Science and Technology / v.30, no.1, 2021 , pp. 36-41 More about this Journal
Abstract
The motivation of this paper is to easily analyze the properties of nondispersive infrared gas sensor that has more than two different optical path length and to suggest the criterion and definition of infrared light absorbance in order to minimize the measurement errors. With the output voltage ratios and the normalized derivatives of infrared ray (IR) absorbance, when the normalized derivatives of IR absorbance decreases from 0.28 to 0.10, the lower and higher limits of errors were decreased from -5.62% and 2.39% to -4.27% and 2.78%. When the normalized derivatives of IR absorbance were 0.10, the output voltage could be partitioned into two regions with one exponential equation and the temperature compensation error was less than 5%.
Keywords
nondispersive infrared gas sensor; IR absorbance; $CO_2$ gas sensor; normalized derivative of IR absorbance; temperature compensation;
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