基于TDLAS技术的吸入便携式甲烷探测仪研制

量子电子学报

基于TDLAS技术的吸入便携式甲烷探测仪研制

刘杰1,2，董洋1,2，古明思1,2，陈家金1，谈图1，高晓明1

1中国科学院安徽光学精密机械研究所大气物理化学研究室，安徽合肥 230031； 2中国科学技术大学，安徽合肥 230026

出版日期:2019-09-28 发布日期:2019-09-18
通讯作者: 高晓明（1965.10-），安徽南陵人，博士，研究员，博士生导师，主要从事高灵敏度痕量气体光谱探测技术及应用方面的研究。 E-mail:xmgao@aiofm.ac.cn
作者简介:刘杰（1992-），安徽合肥人，研究生，主要从事信号处理方面的研究。E-mail：nqjxlj@mail.ustc.edu.cn
基金资助:
Supported by State Key Project of Research and Development Plan (国家重点研发计划，2016YFC0303900，2017YFC0209700)

Development of inhaled portable methane detector based on TDLAS technique

LIU Jie1,2, DONG Yang1,2, GU Mingsi1,2, CHEN Jiajin1, TAN Tu1, GAO Xiaoming1

1 Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China

Published:2019-09-28 Online:2019-09-18

摘要/Abstract

摘要： 为了满足城市管网日常维护中对甲烷（CH4）泄漏检测的需求，研制了一种基于可调谐半导体激光吸收光谱（TDLAS）技术的吸入便携式CH4探测仪，其重量仅为1.4 kg，体积为22 cm?10 cm?10 cm。仪器内部采用中心波长为1654 nm的分布反馈式激光器作为光源，集成了物理基长8.5 cm、有效光程2.25 m的光学多通池。系统基于STM32F405单片机控制激光器产生稳定的调制激光，配合信号采集处理单元实现对吸收信号的采集，并利用数字锁相放大器提取信号中的二次谐波分量，反演得到待测气体浓度。对探测仪进行标定和稳定性实验，结果表明二次谐波信号幅值与气体浓度有良好的线性关系，系统测量精度为?3.05%，仪器的最小可探测极限为0.88 ppm，其精度与便携性满足实际检测需求。

关键词: 光谱学, 可调谐半导体激光, 吸收光谱, 甲烷

Abstract: In order to meet the requirement for detecting the methane（CH4） leakage in the daily maintenance of the network of gas pipelines in cities, an inhaled portable CH4 detector based on tunable diode laser absorption spectroscopy(TDLAS) technique has been developed, whose weight is only 1.4 kg and volume is 22 cm ? 10 cm ? 10 cm. The instrument uses a distributed feedback laser whose central wavelength is 1654 nm as the light source as well as integrating an optical multi-pass cell whose physical basic length is 8.5 cm and effective optical path is 2.25 m. The system based on STM32F405 generates a stable modulation laser by controlling laser, and acquires the absorption signal by the signal acquisition and process unit, then a digital lock-in amplifier is used to extract the second harmonic component in the signal to get the concentration of gas. Calibration and stability tests of the detector are carried out. Results show that there is a good linear relationship between the amplitudes of second harmonic signal and gas concentrations. The measurement accuracy of system is ±3.05% and the minimum detectable limit is 0.88 ppm. The precision and portability of the instrument meet the requirements of actual measurement.

Key words: spectroscopy, tunable diode laser, absorption spectroscopy, methane

刘杰1,2，董洋1,2，古明思1,2，陈家金1，谈图1，高晓明1. 基于TDLAS技术的吸入便携式甲烷探测仪研制[J]. 量子电子学报.

LIU Jie1,2, DONG Yang1,2, GU Mingsi1,2, CHEN Jiajin1, TAN Tu1, GAO Xiaoming1. Development of inhaled portable methane detector based on TDLAS technique[J]. Chinese Journal of Quantum Electronics.

参考文献

[1] Yang Mengmeng, Yuan Mei, Xu Shiqing. Analysis of danger source of mine gas explosion based on Petri nets [J]. Industry and Mine Automation (工矿自动化), 2015, 41(9): 67-70 (in Chinese). [2] Liu Wei, Zhou Yi. Design of coal mine methane concentration detection system based on ZigBee [J]. Computer Measurement & Control (计算机测量与控制), 2018, 26(1): 68-70，75 (in Chinese). [3] Han Hui, Kang Liang, Yang Yi, et al. Discussion on detection method of buried pipeline in gas transmission statio [J]. Petroleum Planning and Engineering (石油规划设计), 2015, 26(5): 46-48 (in Chinese). [4] Zhang Sumin, Jiang Yuejun, Han Xiaoyu, et al. Rapid determination of 14 components in natural gas by GC [J]. Physical Testing and Chemical Analysis (理化检验), 2015, 51(9): 893-896 (in Chinese). [5] Xu Liping. Based on scattered infrared (NDIR) principle of coal mine CH4 detector design[J]. Coal Mine Machinery (煤矿机械), 2012, 33(10): 262-263 (in Chinese). [6] Yang Ruiming. Performances of five kinds of portable exhaust gas analyzer and their applications in environmental[J]. Analytical Instruments (分析仪器), 2018， 5: 144-147 (in Chinese). [7] Chen Jiajin, Wang Guishi, Liu Kun, et al. High sensitivity detection of carbon dioxide based on portable cylindrical multi-pass cell [J]. Spectroscopy and Spectral Analysis (光谱学与光谱分析), 2019, 39(1): 292-296 (in Chinese). [8] Jiang Chunlei, Liu Yunfei, Yu Bo, et al. TDLAS-WMS second harmonic detection based on spectral analysis [J]. Review of Scientific Instruments, 2018, 89(8): 083106. [9] Jiang Jun, Zhao Mingxin, Ma Guo-Ming, et al. TDLAS-based detection of dissolved methane in power transformer oil and field application [J]. IEEE Sensors Journal, 2018, 18(6): 2318-2325. [10] Duan Shangru, Tan Zengqiao, Wang Qi, et al. Research on laser methane detection system based on TDLAS [J]. Electronic Measurement Technology, 2018, 41(1): 101-104. [11] Antoine G, Philippe J, Wei S, et al. Design of slow-light subwavelength grating waveguides for enhanced on-chip methane sensing by absorption spectroscopy [J]. IEEE Journal of Selected Topics in Quantum Electronics, 2019, 25(3): 1-8. [12] Mei Jiaoxu, Wang Lei, Tan Tu, et al. Application of Raman fiber amplifier in remote sensing detection [J]. Chinese Journal of Quantum Electronics (量子电子学报), 2016, 33(3): 311-316 (in Chinese). [13] Zhou Xin. Diode laser absorption sensors for combustion control[J]. Papers in Regional Science, 2005, 84(2): 183-199. [14] Reid J, Labrie D. Second-harmonic detection with tunable diode lasers-comparison of experiment and theory [J]. Applied Physics B, 1981, 26(3): 203-210.

[1]	陈珂马凤翔赵跃李辰溪安冉朱峰杭忱. 基于光纤光声传感的油中溶解气体分析系统[J]. 量子电子学报, 2023, 40(4): 597-605.
[2]	曹冬梅, 李永放 . 领结状金纳米二聚体耦合共振特性研究[J]. 量子电子学报, 2023, 40(4): 606-613.
[3]	费晔, 孙仲谋, 田东鹏, 刘骁源, 刘玉柱, . 基于激光诱导击穿光谱的果木炭燃烧对空气成分影响的研究[J]. 量子电子学报, 2023, 40(4): 436-446.
[4]	王海青 , 施卫 . THz-ATR 技术检测生物医学样品的研究进展[J]. 量子电子学报, 2023, 40(3): 319-332.
[5]	曾子威 , 李宏光 , 郭宇烽 , 廖文焘 . 隐匿危险品高准确度太赫兹光谱识别方法[J]. 量子电子学报, 2023, 40(3): 340-348.
[6]	白岩冰, 张梦圆, 朱梦琪, 李旭, 闫佳玉, 张存林, 左剑, . α-乳糖一水合物太赫兹动力学研究[J]. 量子电子学报, 2023, 40(3): 349-359.
[7]	葛宏义 , 王飞 , 蒋玉英 , 李丽 , 张元 , 贾柯柯 , . 基于宽度学习的太赫兹光谱图像小麦霉变识别研究[J]. 量子电子学报, 2023, 40(3): 360-368.
[8]	张冉冉 , 应璐娜 , 周卫东. 相关向量机结合主成分分析应用于 LIBS 技术定量分析[J]. 量子电子学报, 2023, 40(3): 376-382.
[9]	杨金, , 王云峰, , 储玲巧 , 蒋华超 , 苏付海 ∗. 少层 PtSe2 中光生载流子超快动力学研究[J]. 量子电子学报, 2023, 40(2): 282-292.
[10]	王泽育, 崔琪, 和小虎, 卢丹华, 邱选兵何秋生, 赖云忠, 李传亮∗. I₂⁺离子低能电子态的计算和光谱研究[J]. 量子电子学报, 2022, 39(4): 477-484.
[11]	徐鹏, 贾韧, 姚关心, 秦正波, 郑贤锋, 杨新艳, 崔执凤, . 混合水溶液中金属元素的偏最小二乘法激光诱导击穿光谱[J]. 量子电子学报, 2022, 39(4): 485-493.
[12]	于玮, 周卓彦, 孙仲谋, 张兴龙, 刘玉柱, . 激光诱导击穿光谱技术实时检测蔷薇属植物[J]. 量子电子学报, 2022, 39(4): 494-501.
[13]	丁伯坤, 邵李刚, 王坤阳, 陈家金, 王贵师, 刘锟, 梅教旭, 谈图, 高晓明, ∗. 基于离轴积分腔的海水溶解气体实时检测技术研究[J]. 量子电子学报, 2022, 39(4): 502-510.
[14]	马凤翔, 赵跃, 崔方晓∗, 李大成. 基于支持向量回归的光声光谱信号温度和湿度校正方法[J]. 量子电子学报, 2022, 39(4): 511-518.
[15]	张云琪, 崔超远, 陈永, 鲁翠萍. 苹果酸度可见-近红外无损测定模型设计与优化[J]. 量子电子学报, 2022, 39(4): 531-540.