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

作　　者：于可 刘灿 张磊[1,2] 谭秋林[1,2] YU Ke;LIU Can;ZHANG Lei;TAN Qiulin(Key Laboratory of North University of China micro-nano Devices and systems,Ministry of Education,Taiyuan 030051,China;State Key Laboratory of North University of China Instrument Science and dynamic testing,Taiyuan 030051,China)

机构地区：[1]中北大学微纳器件与系统教育部重点实验室,太原030051 [2]中北大学仪器科学与动态测试国家重点实验室,太原030051

出　　处：《自动化与仪器仪表》2024年第5期213-217,共5页Automation & Instrumentation

基　　金：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)资助。

摘　　要：针对目前市面上CO_(2)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CO_(2)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CO_(2),且满量程精度为2.8%,满足工业生产等领域对CO_(2)实时检测的要求。Aiming at the problems of small range and large size of CO_(2) sensors in the market,a CO_(2) gas sensor based on non-dispersive 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 verified by simulation.In terms of hardware and software,a microcontroller served as the control core,implementing temperature compensation 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 CO_(2) in the range of 0-5%at different temperatures,and the full-scale accuracy was 2.8%,which fulfills the requirements for real-time CO_(2) detection in industrial production and other fields.

关 键 词：非色散红外技术 CO_(2)传感器 气室 气体检测 

分 类 号：TN219[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]