Development of a flat conical chamber-based non-dispersive infrared CO2 gas sensor with temperature compensation

Zhang Jiahong; Lu Chunling; Gu FangLiu QingquanWang MengjuanLi DalinHan Zhu

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Development of a flat conical chamber-based non-dispersive infrared CO2 gas sensor with temperature compensation

机译：Development of a flat conical chamber-based non-dispersive infrared CO2 gas sensor with temperature compensation

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In order to accurately monitor CO2 concentration based on the non-dispersive infrared technique, a novel flat conical chamber CO2 gas sensor is proposed and investigated by simulation analysis and experimental verification. First, the optical design software and computational fluid dynamics method are utilized to theoretically investigate the relationship between the energy distribution, absorption efficiency of infrared radiation, and chamber size. The simulation results show that the chamber length has an optimal value of 8 cm when the cone angle is 5° and the diameter of the detection surface is 1 cm, which makes infrared absorption efficiency optimal. Then, the flat conical chamber CO2 gas sensor system is developed, calibrated, and tested. The experimental results indicate that the sensor can accurately detect CO2 gas concentrations in the range of 0–2000 ppm at 25 °C. It is found that the absolute error of calibration is within 10 ppm, and the maximum repeatability and stability errors are 5.5 and 3.5%, respectively. Finally, the genetic neural network algorithm is presented to compensate for the output concentration of the sensor to solve the problem of temperature drift. Experimental results demonstrate that the relative error of the compensated CO2 concentration is varied from −0.85 to 2.32%, which is significantly reduced. The study has reference significance for the structural optimization of the infrared CO2 gas sensor and the improvement of the measurement accuracy.

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来源
《Review of Scientific Instruments》 |2023年第5期|055001-1-055001-14|共14页
作者
Zhang Jiahong; Lu Chunling; Gu FangLiu QingquanWang MengjuanLi DalinHan Zhu;
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作者单位

Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology;

School of Electronic and Information Engineering, Nanjing University of Information Science and Technology;

School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology;

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Development of a flat conical chamber-based non-dispersive infrared CO2 gas sensor with temperature compensation

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