Yaqi Zhang, Fei Wang, Haibin Cui. Temperature Measurement of Carbon Dioxide Using Fixed-Wavelength Absorption Spectroscopy Technique[J]. Laser & Optoelectronics Progress, 2019, 56(19): 193001
- Laser & Optoelectronics Progress
- Vol. 56, Issue 19, 193001 (2019)
Fig. 1. Diagram of temperature measurement by two-line ratio method
Fig. 2. Diagram of signal acquired using fixed-wavelength absorption spectroscopy
Fig. 3. Line intensity ratio and its sensitivity to temperature
Fig. 4. Peaks of lineshape function and their ratios
Fig. 5. Simulated absorption spectrum peak ratio and relative error. (a) Absorption spectrum peak ratio; (b) relative error
Fig. 6. Diagram of temperature measurement system
Fig. 7. Comparison between experimental measurement temperature and set temperature
Fig. 8. Absolute relative errors obtained by fixed-wavelength method and scanning-wavelength method
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Table 1. CO2 spectral absorption-line parameters
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