Yu JU, Hao CHEN, Li HAN, Yang CHANG, Xue-jian ZHANG. Based on TDLAS Technology Gas Concentration Calibration Algorithm for a Large Range[J]. Spectroscopy and Spectral Analysis, 2020, 40(12): 3665
- Spectroscopy and Spectral Analysis
- Vol. 40, Issue 12, 3665 (2020)
Fig. 1. The simulation curve of gas concentration vs Ratio
Fig. 2. Spectra of water vapor absorption peaks in the range of 1 365 to 1 370 nm
Fig. 3. Schematic diagram of the experimental device
Fig. 4. Gas concentration and transmittance logarithm curve, fitting curve and relative error curve
Fig. 5. The fitting curve of 1/c vs 1/Ratio. The fitting curve using 1/c method and relative error
Fig. 6. Relative errors of polynomial fitting and 1/c method
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Table 1. Results of water vapor absorption spectrum intensity ratio at different concentrations
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Table 2. Correlation coefficient and root mean square error of three fitting curves
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Table 3. Results of polynomial fitting and 1/c method
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