非色散红外二氧化碳传感器的设计与实现
Design andImplementation of Non-dispersive Infrared Carbon Dioxide Sensor
于可 1刘灿 1张磊 1谭秋林1
作者信息
- 1. 中北大学微纳器件与系统教育部重点实验室,太原 030051;中北大学仪器科学与动态测试国家重点实验室,太原 030051
- 折叠
摘要
针对目前市面上CO2传感器量程小、体积大等问题,以红外光谱吸收原理为基础,设计了一种基于非色散红外技术的CO2气体传感器.在朗伯-比尔定律基础上引入气体非吸收峰对浓度检测的影响,并据此建立了相应的浓度计算方程.在气室方面,提出了一种反射型结构,并通过仿真验证了该结构的可行性.在软硬件方面,以单片机作为控制核心,并在其内部实现了温度补偿及浓度拟合功能.为测试性能,使用温度试验箱搭建测试平台.结果表明,在不同温度下,该传感器能够准确测量0-5％范围内的CO2,且满量程精度为2.8％,满足工业生产等领域对CO2实时检测的要求.
Abstract
Aiming at the problems of small range and large size of CO2 sensors in the market,a CO2 gas sensor based on non-dis-persive infrared technology was developed by leveraging the absorption principle of infrared spectrum.On the basis of the Lambert-Beer law,the impact of non-absorbing peaks of gases on concentration detection was introduced,and the corresponding concentration calculation equation was established.Regarding the gas chamber,a reflective structure was proposed,and the feasibility of it was ver-ified by simulation.In terms of hardware and software,a microcontroller served as the control core,implementing temperature com-pensation and concentration fitting functionalities internally.To test the performance,a temperature test chamber was used to build the test platform.The results showed that the sensor could accurately measure CO2 in the range of 0-5％at different temperatures,and the full-scale accuracy was 2.8％,which fulfills the requirements for real-time CO2 detection in industrial production and other fields.
关键词
非色散红外技术/CO2传感器/气室/气体检测Key words
non-dispersive infrared technology/CO2 sensor/gas chamber/gas detection引用本文复制引用
基金项目
国家自然基金青年项目(52105594)
山西省留学人员科技活动择优资助项目(20210011)
山西省应用基础研究计划青年项目(20210302124274)
出版年
2024
NETL
NSTL
万方数据