基于NDIR的甲烷气体传感器设计与测试  

Design and Test of Methane Gas Sensor Based on NDIR

作　　者：王琛[1] 邢海霞 李晓干[1] WANG Chen;XING Haixia;LI Xiaogan(School of Integrated Circuits,Dalian University of Technology,Dalian 116620,China)

机构地区：[1]大连理工大学集成电路学院,大连116620

出　　处：《微处理机》2024年第3期39-42,共4页Microprocessors

基　　金：国家自然科学基金(62201117)(61971085)(62111530055)。

摘　　要：针对目前非分光红外CH4气体传感器灵敏度较低且响应时间较长等问题,设计一款基于光电导原理的CH4气体传感器。该传感器主要由PbSe光导型红外探测器、信号处理部分电路、光源驱动部分电路及光路气室组成,通过分析气体浓度与探测器输出信号之间的关系,拟合浓度输出关系方程,以实现检测功能。通过实验,在室温下对不同浓度气体进行检测,结果表明该传感器的输出误差、最低检测限、最低响应时间等参数表现良好,可在1000 cm^(3)/m^(3)范围内对气体实现有效测量。Aiming at the problems of low sensitivity and long response time of non-dispersive infrared CH4 gas sensor,a CH4 gas sensor based on photoconductive principle is designed.The sensor is mainly composed of PbSe photoconductive infrared detector,signal processing circuit,light source driving circuit and light path gas chamber.By analyzing the relationship between gas concentration and detector output signal,the concentration output relationship equation is fitted to realize the detection function.Through experiments,gases with different concentrations are detected at room temperature.The results show that the output error,minimum detection limit,minimum response time and other parameters of the sensor are good,and the gas can be effectively measured in the range of 1000 cm^(3)/m^(3).

关 键 词：光导型探测器 浓度标定 非分光红外技术 

分 类 号：TN215[电子电信—物理电子学]