Ying HE, Yu-Jun ZHANG, Kun YOU, Bo-Qiang FAN, Meng-Qi LI, Dong-Qi YU, Hao XIE, Bo-En LEI, Wei JIA, Jun-Sen JING, Wen-Qing LIU. Precise measurements the broadening characteristics and parameters of methane near-infrared absorption spectrum at high pressure[J]. Journal of Infrared and Millimeter Waves, 2020, 39(6): 742
- Journal of Infrared and Millimeter Waves
- Vol. 39, Issue 6, 742 (2020)
Fig. 1. （a） Spectrum measurement experimental platform, （b） gas path connection of experimental device
Fig. 2. （a） Absorbance signal before and after filtering, （b） line-type fitting and residual result
Fig. 3. Absorbance spectral signals after Lorentz line-type fitting
Fig. 4. Nitrogen broadening coefficient at 6 046.96 cm-1
Fig. 5. Center frequency drift phenomenon
Fig. 6. Calculated the pressure shift coefficient of nitrogen-induced
Fig. 7. Absorbance signals of different concentration at high pressure
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Table 1. Specific parameters of methane absorption line at 6046.9647 cm-1（Hitran2008 database）
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Table 2. Methane standard gas concentration and inverted concentration
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