| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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The Influences of Temperature, Concentration and Pressure Uncertainties on the Measurement Results of Wavelength Modulation Spectroscopy |
| CHE Lu, DING Yan-Jun**, PENG Zhi-Min |
| State Key Laboratory of Power Systems, Department of Thermal Engineering, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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CHE Lu, DING Yan-Jun, PENG Zhi-Min 2012 Chin. Phys. Lett. 29 067801 |
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Abstract Gas temperature, species concentration, and pressure uncertainties inevitably affect the measurement results of wavelength modulation spectroscopy. We analyze and calculate the influences of these uncertainties on CO2 concentration and temperature measurement results. Calculation results show that uncertainties in the pressure and CO2 concentration have little influence on temperature measurement results. On the contrary, CO2 concentration measurement results are notably influenced by pressure uncertainty, and greatly influenced by temperature uncertainty. To solve these problems in the temperature, species concentration, and pressure uncertainties, we take the experimental data from the previous study and analyze them using the iteration method with the purpose of obtaining the optimal values of gas temperature and CO2 concentration.
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Received: 22 December 2012
Published: 31 May 2012
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| PACS: |
78.40.-q
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(Absorption and reflection spectra: visible and ultraviolet)
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78.30.-j
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(Infrared and Raman spectra)
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42.68.Ca
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(Spectral absorption by atmospheric gases)
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