山东科学 ›› 2022, Vol. 35 ›› Issue (6): 103-108.doi: 10.3976/j.issn.1002-4026.2022.06.013

• 光纤与光子传感技术 • 上一篇    下一篇

基于光谱吸收的CO2气体检测系统

宫卫华1(), 张婷婷1, 魏玉宾1, 王兆伟1, 李艳芳1, 张秦端1, 刘统玉1,2, 张伟1   

  1. 1.齐鲁工业大学(山东省科学院) 山东省科学院激光研究所,山东 济南 250103
    2.山东省微感光电子有限公司,山东 济南 250103
  • 收稿日期:2022-02-14 出版日期:2022-12-20 发布日期:2022-12-02
  • 作者简介:宫卫华(1992—),女,硕士,助理研究员,研究方向为激光气体检测技术与应用。E-mail:weihua.gong@sdlaser.cn
  • 基金资助:
    国家重点研发计划(2021YFB3201904);国家重点研发计划(2021YFB3201905);山东省重大科技创新工程项目(2019JZZY020501);山东省自然科学基金(ZR2019PF016);山东省自然科学基金(ZR2020QF098);济南市创新团队项目(2020GXRC032)

Study on CO2 detecting system based on spectrum absorption

GONG Wei-Hua1(), ZHANG Ting-Ting1, WEI Yu-Bin1, WANG Zhao-Wei1, LI Yan-Fang1, ZHANG Qin-Duan1, LIU Tong-Yu1,2, ZHANG Wei1   

  1. 1. Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250103, China
    2. Shandong Micro-Sensor Photonics Ltd., Jinan 250103, China
  • Received:2022-02-14 Online:2022-12-20 Published:2022-12-02

摘要:

针对CO2气体实时在线监测的应用需求,以比尔-朗伯定律为理论基础,基于可调谐半导体激光吸收光谱技术搭建一套CO2气体在线检测系统。选择吸收谱线波长为1 609.583 nm,并在系统中搭建两路参考光路用于消除光源信号波动和实现自动寻峰,以提高检测系统的稳定性与准确性。通过对系统的标定与校准,系统测量相对误差小于0.8%,系统重复性小于0.06%,响应时间不超过18 s,对空气中CO2的体积分数进行连续4 h监测,其值的波动范围为360×10-6 ~ 400×10-6。试验结果表明该系统具有较好的稳定性与可靠性,可满足CO2气体实时在线监测的应用需求。

关键词: 二氧化碳, 可调谐半导体激光吸收光谱技术, 气体检测, 参考光路

Abstract:

To meet the application requirements of real-time carbon dioxide (CO2)-gas online monitoring, this paper proposes an online detection system for the CO2 gas based on tunable diode laser absorption spectroscopy according to the theory of Beer-Lambert law. The selected absorption spectrum wavelength of the system is 1 609.583 nm. Futher, two reference optical paths are built to eliminate the signal fluctuation of the light source and automatically detect the absorption peak to improve the stability and accuracy of the detection system. The calibration of the system shows that the relative measurement error of the system is less than 0.8%, the system repeatability is less than 0.06%, and the response time is less than or equal to 18 s. Continuous monitoring of CO2 in the air for 4 h shows that the fluctuation range of the volume fraction measurement is 360×10-6 to 400×10-6. The system has good stability and reliability and can meet the application requirements of real-time CO2 gas online monitoring.

Key words: carbon dioxide, tunable diode laser absorption spectroscopy technology, gas detection, reference optical path

中图分类号: 

  • P41