Research on Open-Path Detection for Atmospheric Trace Gas CO Based on TDLAS

Lu, 姚路 Yao; Wenqing, 刘文清 Liu; Jianguo, 刘建国 Liu; Ruifeng, 阚瑞峰 Kan; Zhenyu, 许振宇 Xu; Jun, 阮俊 Ruan; Yunhai, 戴云海 Dai

doi:10.3788/cjl201542.0215003

Cited by 3 publications

(1 citation statement)

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“…Moreover, a TDLAS-based gas sensor is capable of remote sensing, which is very desirable for safety in gas facilities. Therefore, open optical path based TDLAS has great potential for realizing the long-distance real-time in-situ monitoring of CH 4 gas [8][9][10][11]. Besides, compared with the 2f wavelength modulation spectroscopy (WMS) technique, which is used to enhance the sensitivity and detection limit, the direct optical absorption spectroscopy (DAS) has the advantages of simple and compact structure, low cost, excellent sensitivity, and high reliablity, etc.…”

Section: Introductionmentioning

confidence: 99%

A high-sensitive methane measuring telemetry system based on a direct optical absorption technique

Dong¹,

Yao²,

Zhao³

et al. 2020

Laser Phys.

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In this paper, a reflective methane (CH4) gas telemetry system has been developed based on the direct optical absorption spectroscopy technique for an open light path. It can realize the real-time in-situ monitoring of CH4 gas within a range of 150 m. Considering the potential cross-interference effects of hydrocarbon gases in ambient air, a diode laser operating at a specific wavelength of 1653.7 nm is employed to target the strong CH4 absorption line in near-infrared region and therefore avoid the interference of water vapor absorption simultaneously. A measurement precision of 0.02 ppm within 40 m open optical path has been achieved over 30 h of continuous monitoring, indicating the excellent measuring sensitivity and stability of our telemetry system. Through the field test of leaked CH4 gas with a 150 m one-way open optical path, the developed CH4 telemetry system has proved to have great potential and reliability for environmental monitoring and remote gas detection in various industries.

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Section: Introductionmentioning

confidence: 99%

A high-sensitive methane measuring telemetry system based on a direct optical absorption technique

Dong¹,

Yao²,

Zhao³

et al. 2020

Laser Phys.

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Design and test of a high precision digital CO monitor

Wang

2019

2019 14th IEEE International Conference on Electronic Measurement &Amp; Instruments (ICEMI)

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基于波长调制腔增强吸收光谱技术的co体积分数测量

Wang Xuan,

Gao Guangzhen,

Long Fangyu

et al. 2023

中国激光

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Objective Based on cavityenhanced absorption spectroscopy (CEAS) and wavelength modulated spectroscopy (WMS) technology, a cavityenhanced spectrum measurement system was built to measure the volume fraction of CO gas. In an experiment, a distributed feedback laser (DFB) laser with a central wavelength of 2.3 µm was used as the light source, and an optical cavity with a base length of 30 cm was constructed with two highly reflective mirrors with a reflectivity of 99.8%. An effective absorption path of 147.15 m was achieved. On this basis, CO was detected using the CO absorption spectral line at 4297.705 cm -1 as the sensing target.

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Research on Open-Path Detection for Atmospheric Trace Gas CO Based on TDLAS

Cited by 3 publications

References 0 publications

A high-sensitive methane measuring telemetry system based on a direct optical absorption technique

A high-sensitive methane measuring telemetry system based on a direct optical absorption technique

Design and test of a high precision digital CO monitor

基于波长调制腔增强吸收光谱技术的co体积分数测量

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