摘要
传统的CO_(2)检测系统体积大、响应时间长,难以满足工业开采中对CO_(2)气体的检测要求。文中以红外光源、气室、双通道热释电探测器和单片机为核心,设计了一款具有温度补偿功能的高精度红外CO_(2)气体传感器。采用单光路双波长的反射式气室结构,提高了整个系统的紧凑程度。在硬件方面,采用含光源驱动和信号调理电路的一体化模块,降低了电路耦合性,实现了传感器的微型化。在软件方面,采用差比值标定法建立温度补偿模型,消除环境干扰。实验结果表明:该传感器可以在0~30℃的温度下,对体积分数为0~5%的CO_(2)气体检测的最大测量误差小于±0.15%,且检测精度为3%,具有高精度、大量程,微型化、稳定性好等优点,满足工业开采等领域的实时监测要求。
The traditional CO_(2)detection system is difficult to meet the requirements of CO_(2)detection in industrial exploitation due to its large volume and long response time.Based on infrared light source,gas chamber,dual-channel pyroelectric detector and single chip microcomputer,a high-precision infrared CO_(2)gas sensor with temperature compensation function was designed.The reflection chamber structure of single light path and double wavelength was selected to improve the compactness of the whole system.In terms of hardware,the integrated module including light source driver and signal conditioning circuit was used to reduce the coupling of the circuit and realize the miniaturization of the sensor.In software,the ratio calibration method was used to establish the temperature compensation model to eliminate the environmental interference.The experimental results show that the sensor can detect CO_(2)gas in 0~5%concentration at 0~30℃,the maximum measurement error is only±0.15%,and the detection accuracy is 3%.The sensor has the advantages of high precision,large range,micromation and good stability,and meets the requirements of real-time monitoring in industrial mining and other fields.
作者
张雅楠
刘灿
张磊
谭秋林
于可
刘瑞康
ZHANG Ya'nan;LIU Can;ZHANG Lei;TAN Qiulin;YU Ke;LIU Ruikang(North University of China,State Key Laboratory of Dynamic Measurement Technology,Taiyuan 030051,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2023年第9期23-28,共6页
Instrument Technique and Sensor
基金
科技部重点研发计划(2019YFB2005704)
国家自然科学基金青年项目(52105594)
山西省应用基础研究计划青年项目(20210302124274)
山西省留学人员科技活动择优资助项目(20210011)
国家自然科学基金创新研究团队项目(51821003)
山西省“1331”重点学科建设项目。
关键词
非分光红外
气室
温度补偿
气体传感器
non-spectral infrared
gas chamber
temperature compensation
gas sensor
