Infrared and Laser Engineering, Volume. 53, Issue 5, 20240068(2024)
Application of atmospheric multi-parameter lidar in safety, environmental protection and carbon dioxide monitoring in chemical industrial parks
Figures & Tables(9)
Fig. 1. Schematic diagram of the atmospheric multi-parameter lidar system
Fig. 2. Results of the range-corrected echo signal
Fig. 4. Two sets of horizontal scanning results of CO2 concentration and wind vector on 2023-03-29 and 2023-03-30
Fig. 5. A set of horizontal scans on 2023-03-31. (a) Schematic diagram of the measurement area; (b) CO2 concentration horizontal scanning results; (c) Horizontal wind speed measurement results
Fig. 6. Time change of CO2 concentration for the three sites in Fig.5(a)
Fig. 7. Continuous observations of meteorological information from 2023-06-18 to 2023-06-19
Table 1. System parameters of the atmospheric multi-parameter lidar
View tableView in ArticleTable 1. System parameters of the atmospheric multi-parameter lidar
Parameter Value Wavelength range of ECDL/nm 1530-1620 Wavelength for CO2 detection/nm On: 1572.335 Off: 1572.454 Pulse energy/μJ 80 Repetition frequency/kHz 10 Diameter of collimator/mm 80 Diameter of telescope/mm 70 Spatial resolution/m 120 Temporal resolution/min 1 Maximum detection range/km 6 Azimuth scanning range/(°) 0-360 Zenith scanning range/(°) 0-90 Detection efficiency of SNSPD 31.5%@ 1572 nm Active area diameter/μm 50 Pixel number 9 Dark count rate/cps 100 Responsibility of BD/A·W−1 1.0
Table 2. Spectral parameters and the lower limit of optimal concentration of detectable dangerous gases in the chemical industry park
View tableView in ArticleTable 2. Spectral parameters and the lower limit of optimal concentration of detectable dangerous gases in the chemical industry park
Molecular formula Wavenumber/ cm−1 Wavelength/ nm Line strength/ cm2·cm−1·mol−1 Ground state energy/ cm−1 Environmental concentration/ ppm Lower limit of optimal concentration/ ppm CO2 6359.967 1572.352 1.76×10−23 106.130 415.0 74.00 CO 6377.407 1568.035 2.22×10−23 107.642 1.1 38.00 H2S 6369.810 1569.906 6.17×10−23 114.178 2.0×10−4 11.00 NH3 6528.900 1531.652 1.35×10−21 298.300 3.6×10−4 1.18 CH4 6176.993 1618.911 1.53×10−23 376.730 1.5 36.00 C2H2 6529.172 1531.588 1.17×10−20 155.289 1.0×10−4 0.16 CS2 6466.295 1546.481 3.33×10−28 101.477 3.0×10−6 8.07
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Qiuwei Xia, Zhen Zhang, Saifen Yu, Haiyun Xia, Fanfeng Pan. Application of atmospheric multi-parameter lidar in safety, environmental protection and carbon dioxide monitoring in chemical industrial parks[J]. Infrared and Laser Engineering, 2024, 53(5): 20240068
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Received: Feb. 7, 2024
Accepted: --
Published Online: Jun. 21, 2024
The Author Email: Yu Saifen (sfyu@nuist.edu.cn)
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