Research Article
Design of Portable CO_2 Infrared Detection System for Flue Gas
@INPROCEEDINGS{10.4108/eai.2-6-2023.2334597, author={Rong BAO and Jinming WANG and Jie WU and Feng WANG and Zhiyong ZHANG}, title={Design of Portable CO_2 Infrared Detection System for Flue Gas}, proceedings={Proceedings of the 2nd International Conference on Information Economy, Data Modeling and Cloud Computing, ICIDC 2023, June 2--4, 2023, Nanchang, China}, publisher={EAI}, proceedings_a={ICIDC}, year={2023}, month={8}, keywords={infrared absorption method; portable; co2 detection;}, doi={10.4108/eai.2-6-2023.2334597} }- Rong BAO
Jinming WANG
Jie WU
Feng WANG
Zhiyong ZHANG
Year: 2023
Design of Portable CO_2 Infrared Detection System for Flue Gas
ICIDC
EAI
DOI: 10.4108/eai.2-6-2023.2334597
Abstract
There are many interference components in boiler flue gas and the concentration of CO2 is large. According to this characteristic, a portable CO2 concentration detection system in flue gas is designed based on infrared absorption method. This article adopts a dual-channel detection technology with a single-wavelength dual-optical path structure. The central wavelength of the mid infrared laser diode is 4.26μm.Select the appropriate photodetector. According to the weak current signal output by the photodetector, a hardware circuit is designed to condition the signal. The hardware circuit includes preamplifier circuits, phase-locked amplifier circuits, and low-pass filter circuits. STM32 is used as the main control chip. STM32 completes the A/D sampling, display and transmission of the signal. The experimental results show that the system can achieve the purpose of detecting CO2 concentration in flue gas.