주변 온도 영향에 따른 비분산 적외선 가스센서의 출력 특성 해석
Analysis of Output Voltage Properties of Non-dispersive Infrared Gas Sensors According to Ambient Temperatures
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This article describes the output properties of non-dispersive infrared carbon dioxide(CO2) sensors resulting from the changes in ambient temperatures. After the developed sensor module was installed inside the gas chamber, the temperature was set to 267 K, 277K, 300 K, and 314 K, and the concentrations of CO2 gas were increased from 0 to 5,000 ppm. Then, the output voltage at each con- centration was obtained. Through these experimental results, two observations were made. First, both the CO2 sensor and the referencesensor showed an increase in the output voltages as the temperature rose from 0 ppm, Second, the full scale outputs of the CO2 sensorgrew as the temperature increased. The output characteristics were analyzed based on two factors: change in the radiant energy of theinfrared light source and change in the absorptivity of CO2 gas according to the ambient temperature. Additionally, temperature com- pensation methods were discussed.
Abstract
This article describes the output properties of non-dispersive infrared carbon dioxide(CO2) sensors resulting from the changes in ambient temperatures. After the developed sensor module was installed inside the gas chamber, the temperature was set to 267 K, 277K, 300 K, and 314 K, and the concentrations of CO2 gas were increased from 0 to 5,000 ppm. Then, the output voltage at each con- centration was obtained. Through these experimental results, two observations were made. First, both the CO2 sensor and the referencesensor showed an increase in the output voltages as the temperature rose from 0 ppm, Second, the full scale outputs of the CO2 sensorgrew as the temperature increased. The output characteristics were analyzed based on two factors: change in the radiant energy of theinfrared light source and change in the absorptivity of CO2 gas according to the ambient temperature. Additionally, temperature com- pensation methods were discussed.
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