Li Yafei, Ma Yanming, Zheng Chuantao, Yu Di, Hu Lien, Yang Shuo, Song Fang, Li Yadan, Liu Shuanghai, Zhang Zhanrui, Zhang Yu, Wang Yiding, Tittel Frank K
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2024 Feb 15;307:123581. doi: 10.1016/j.saa.2023.123581. Epub 2023 Oct 29.
To effectively monitor gas explosion and coal spontaneous combustion in coal mine, an intrinsically safe and explosion-proof dual-gas sensor system was developed for methane (CH) and carbon monoxide (CO) measurement. A distributed feedback (DFB) laser was used to scan two adjacent absorption lines (CH: 4284.51 cm, CO: 4285.01 cm). Two measurement ranges of 0-500 parts per million by volume (ppmv) and 0-300,000 ppmv for CH and 0-100 ppmv and 0-4000 ppmv for CO were realized using a ∼25 cm single-pass gas cell (SPGC) and a ∼25 m multi-pass gas cell (MPGC), respectively. A gas pre-treatment module was used to remove moisture and aerosols from gas samples. A temperature compensation algorithm was adopted to deal with ambient temperature change. Based on the Allan deviation analysis, the limit of detection (LoD) of CH is 0.19 ppmv and the LoD of CO is 0.12 ppmv, respectively, at an averaging time of 0.5 s. A continuous two-day CH measurement was performed to demonstrate the long-term stability and environmental monitoring capability. The sensor system was successfully deployed in coal mine gas analysis at Longjiapu, Changchun City, China.
为有效监测煤矿中的瓦斯爆炸和煤炭自燃情况，开发了一种本质安全型防爆双气体传感器系统，用于测量甲烷（CH）和一氧化碳（CO）。采用分布式反馈（DFB）激光器扫描两条相邻的吸收线（CH：4284.51厘米，CO：4285.01厘米）。分别使用一个约25厘米的单程气室（SPGC）和一个约25米的多程气室（MPGC），实现了CH的两个测量范围，即0 - 500体积百万分比（ppmv）和0 - 300,000 ppmv，以及CO的两个测量范围，即0 - 100 ppmv和0 - 4000 ppmv。使用气体预处理模块去除气体样品中的水分和气溶胶。采用温度补偿算法来应对环境温度变化。基于阿伦偏差分析，在平均时间为0.5秒时，CH的检测限（LoD）为0.19 ppmv，CO的检测限为0.12 ppmv。进行了为期两天的连续CH测量，以证明其长期稳定性和环境监测能力。该传感器系统已成功部署在中国长春市龙家堡煤矿的瓦斯分析中。
