Haibin Cui, Fei Wang, Meiyi Li. Measurements of CO2 Temperature and Concentration in High Temperature Environment Based on Tunable Diode Laser Absorption Spectroscopy[J]. Laser & Optoelectronics Progress, 2018, 55(5): 053003
- Laser & Optoelectronics Progress
- Vol. 55, Issue 5, 053003 (2018)
Fig. 1. Absorption line strength of (a) CO, (b) H2O and (c) CO2 in the wavelength range of 1-3 μm
Fig. 2. Simulated absorption spectra
Fig. 3. Simulated results of line pairs. (a) Line pair 1; (b) line pair 2; (c) line pair 3
Fig. 4. (a) Variations of line strength with temperature; (b) line strength ratio and their sensitivity with temperature
Fig. 5. Diagram of the high temperature measurement system
Fig. 6. (a) Spectral absorption signal and multi-peak fitting results using Voigt function and (b) fitting residual
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Table 1. CO2 spectral absorption-line parameters
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Table 2. Measured temperature under different operating conditions
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Table 3. Deviation of measured temperatures with given temperature
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Table 4. Measured CO2 concentration under different operating conditions
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Table 5. Deviation of measured CO2 concentration with given value under different operating conditions
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