| 36 | 0 | 34 |
| Downloads | Citas | Reads |
To enable non-contact remote estimation of the absolute methane volume fraction at non-fixed measurement points in mines， a dual-optical-path differential absorption laser method is proposed. The method is based on the principle of methane path-integrated volume fraction measurement using a single optical path. Two adjacent parallel optical paths are arranged in the measurement area to obtain path-integrated methane volume fraction information at different spatial positions. By using the difference between the two path-integrated volume fractions， an approximate relationship is established between this difference and the local methane volume fraction near the target measurement point. In this way， the conventional path-integrated measurement result is transformed into an estimate of the local methane volume fraction at a non-fixed measurement point. This conversion helps alleviate the inherent limitation of single-path measurements， which provide only cumulative information along the optical path. To evaluate the feasibility of the proposed method and the effects of key parameters， a simulation model of the local methane volume fraction field near a coal wall is developed. The effects of the vertical distance Δn between the reference reflective surface and the target measurement point， together with the optical-path spacing d， on the estimation error are analyzed. The results show that， under a given Δn， the estimation error first decreases and then increases with increasing d， indicating that an appropriate matching relationship exists between d and Δn. When Δn is 0.02， 0.04， and 0.06 m， the corresponding preferred d values are approximately 0.05， 0.17， and 0.35 m， respectively. The minimum absolute error reaches 0.000 9%. As Δn increases， the preferred d generally increases， reflecting a balance between the difference in path-integrated information and the local representativeness of the measurement. When the absolute error is no greater than 0.01%， d can be adjusted within an allowable range. The results provide a theoretical basis and a methodological reference for remote estimation of the absolute methane volume fraction at non-fixed measurement points in mines.
[1]王远声， 景国勋， 郭绍帅， 等. 煤矿瓦斯爆炸灾害的复杂网络分析与断链减灾措施研究[J].安全与环境学报， 2025， 25(6): 2132-2141.
[2] 王春晓， 陈开岩， 司俊鸿， 等. 综放工作面瓦斯涌出规律分析[J]. 煤炭科学技术， 2011， 39(11): 77-80.
[3] 王洪胜， 吴兵， 雷柏伟. 综放工作面瓦斯积聚影响因素模拟研究[J]. 煤矿安全， 2018， 49(3): 151-154.
[4] 肖思文， 宾光富， 魏兴. 一种新型中小型煤矿瓦斯浓度检测装置[J]. 煤炭科学技术， 2008， 36(11): 89-91.
[5] 袁维贵， 褚福爱. 煤矿瓦斯检测传感器的现状及发展趋势[J]. 煤炭科技， 2012(4): 99-100.
[6] Hinkley E D. High-resolution infrared spectroscopy with a tunable diode laser[J]. Applied Physics Letters， 1970， 16(9): 351-354.
[7] Gong Weihua， Hu Jie， Wang Zhaowei， et al. Recent advances in laser gas sensors for applications to safety monitoring in intelligent coal mines[J]. Frontiers in Physics， 2022， 10: 1058475.
[8] 阚瑞峰， 刘文清， 张玉钧， 等. 可调谐二极管激光吸收光谱法测量环境空气中的甲烷含量[J].物理学报， 2005， 54(4): 1927-1930.
[9] 王琦. 新型激光甲烷传感器的设计与应用研究[J]. 机电管理开发， 2024(5): 243-244.
[10] 王小松. 矿用激光甲烷传感器工作稳定性加速试验[J]. 工矿自动化， 2019， 45(12): 45-49.
[11] 邓廷， 覃雪岗. 矿用激光甲烷传感器示值误差校准的标准化研究[J]. 中国标准化， 2026(3): 243-246.
[12] 石旺龙， 张亮， 臧金亮. 基于非合作目标的TDLAS气体遥测技术研究进展[J]. 计量科学与技术， 2025， 69(6): 19-26.
[13] Ma Rong， Pan Fuqian， Wang Ting， et al. Development of methane leakage telemetry system based on tunable diode laser absorption spectroscopy[J]. Journal of Physics: Conference Series， 2023， 2612: 012003.
[14] 郭学范， 刘闯， 王劲松， 等. 激光甲烷遥测仪光路结构优化与研制[J]. 激光与红外， 2025， 55(10): 1609-1616.
[15] Xie Zhitao， Lin Guanyu， Wang Jianing， et al. Coal combustion warning system based on TDLAS and performance research[J]. Photonics， 2025， 12(5): 493.
[16] Dong Jinghan， Nie Weijie， Cardoso A C， et al. Open-path methane sensing via backscattered light in a nonlinear interferometer[J]. APL Photonics， 2025， 10(11): 116106.
[17] Plant G， Nikodem M， Mulhall P， et al. Field test of a remote multi-path CLaDS methane sensor[J]. Sensors， 2015， 15(9): 21315-21326.
[18] Wang Di， Li Yushuang， Pu Yu， et al. Vertical distribution mapping for methane fugitive emissions using laser path-integral sensing in non-cooperative open paths[J]. Sensors， 2024， 24(4): 1307.
[19] Fan Weiqiang， Li Xiaoyu， Zhan Ying， et al. Research on methane telemetry method using differential-harmonic detection[C]//Proceedings of the 2023 6th International Conference on Signal Processing and Machine Learning. New York: Association for Computing Machinery， 2023: 8-13.
[20] 丁武文，孙利群，衣路英. 基于可调谐半导体激光器吸收光谱的高灵敏度甲烷浓度遥测技术[J]. 物理学报， 2017， 66 (10): 53-61.
[21] 李绍民，孙利群. 基于改进波长调制光谱技术的高吸收度甲烷气体测量[J]. 物理学报， 2023， 72 (1): 55-62.
Basic Information:
DOI：10.13637/j.issn.1009-6094.2026.0969
China Classification Code:TD712;TN249;TP391.9
Citation Information:
[1]Zhang Andong,Hu Min,Zhao Dongyue ,et al.Simulation study of mine gas laser remote sensing technology based on dual optical paths[J].Journal of Safety and Environment().DOI:10.13637/j.issn.1009-6094.2026.0969.
Fund Information:
国家自然科学基金青年项目（52404191）; 安徽省高等学校科学研究项目（2023AH051183）; 安徽理工大学引进人才科研启动基金项目（2022yjrc40）
2026-09-04
2026-09-04
2026-09-04