Mingxing Li, Zhenyu Xu, Ruifeng Kan, Yabai He, Lu Yao, Bing Chen, Jun Ruan, Bangyi Tao, Hao Liu. Development of Laser Gas Analyzer for Eddy Correlation Method[J]. Chinese Journal of Lasers, 2021, 48(11): 1111001
- Chinese Journal of Lasers
- Vol. 48, Issue 11, 1111001 (2021)
Fig. 1. Simulated absorption spectra. (a) Absorption spectrum of H2O around 7181 cm-1; (b) absorption spectra of CO2 around 4990 cm-1
Fig. 2. Structural schematics of analyzers. (a) Structural schematic of H2O analyzer; (b) structural schematic of CO2 analyzer
Fig. 3. Schematic and photo of measurement system. (a) Schematic of measurement system; (b) photo of measurement system
Fig. 4. Spectral signals of different concentrations of CO2. (a) Direct absorption signal; (b) second derivative spectral signal
Fig. 5. Linear correlation between concentrations and peak values
Fig. 6. Instrument installation photos
Fig. 7. Comparisons for continuous 4 h data and 1 s data. (a) H2O concentration data; (b) CO2 concentration data
Fig. 8. Allan variance analysis of TDLAS-CO2/H2O analyzers. (a) TDLAS-CO2 analyzer; (b) TDLAS-H2O analyzer
Fig. 9. Monitoring data for a continuous week of TDLAS-H2O/CO2 analyzer. (a) TDLAS-CO2 analyzer; (b) TDLAS-H2O analyzer
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Table 1. Main performances comparison of two instruments
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