TDLAS技术在瓦斯浓度检测仪中的应用  

Application of TDLAS technology in gas concentration detector

作　　者：贾鹏 王瑞 JIA Peng;WANG Rui(Xishan Coal Power(Group)Co.,LTD,,Taiyuan,Shanxi 030053,China;Shanxi Linfen Xishan Energy Co.,LTD.,Linfen,Shanxi 041099,China)

机构地区：[1]西山煤电(集团)有限责任公司,山西太原030053 [2]山西临汾西山能源有限责任公司,山西临汾041099

出　　处：《煤炭加工与综合利用》2025年第3期106-109,共4页Coal Processing & Comprehensive Utilization

摘　　要：甲烷气体在煤矿开采中不仅影响作业人员的身体健康,甲烷浓度较高的情况下甚至会威胁到作业人员生命安全,传统甲烷检测仪面对复杂的煤矿环境和检测位置,容易出现检测灵敏度较低以及检测准确度较差的问题,因此针对该问题提出利用甲烷气体1653.72 nm波长的物理特性,提取甲烷气体二次谐波的方式,基于TDLAS技术设计检测系统,进行对比试验研究表明:该系统具有灵敏度高、检测误差小的特点,不同温度下,甲烷体积分数<5%时灵敏度较好,标准浓度与实际浓度误差低于0.15%,检测结果拟合度达到0.988,能够满足煤矿生产过程中对检测精度、稳定性和重复性的实际检测需求。Methane gas not only affects the health of workers in coal mining,but also threatens the life safety of workers when the methane concentration is high Therefore,in order to solve this problem,the physical characteristics of the wavelength of methane gas at 1653.72 nm are proposed to extract the second harmonic of methane gas,and the detection system is designed based on TDLAS technologyThe sensitivity is good at<5%,the error between the standard concentration and the actual concentration is less than 0.15%,and the fitting degree of the detection results reaches 0.988,which can meet the actual detection requirements for detection accuracy,stability and repeatability in the coal mine production process.

关 键 词：二次谐波 TDLAS技术 灵敏度 甲烷浓度 拟合度 

分 类 号：TD712.55[矿业工程—矿井通风与安全]