| 测量NO气体吸收截面的方法 |
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| 引用本文： | 张颖超,苗丰.测量NO气体吸收截面的方法[J].南京气象学院学报,2011(2):142-146. |
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| 作者姓名： | 张颖超 苗丰 |
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| 作者单位： | 南京信息工程大学 信息与控制学院,南京,210044 |
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| 摘 要： | 差分吸收光谱技术(DOAS)已经被广泛用于各种污染气体浓度的测量,其中影响其测量精度的主要因素就是气体吸收截面的测量.利用Lambert Beer 吸收定律以及自主设计的测量装置对大气的主要污染气体NO的吸收截面进行了测量,并采用多项式拟合的方法提高了测量的精度,根据所测得的吸收截面反演了NO气体的浓度值,取得了良好的效果.
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| 关 键 词： | 差分吸收光谱技术 NO气体 吸收截面 多项式拟合 |
Technological study of measurement of absorption cross section of NO |
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| ZHANG Yingchao,MIAO Feng.Technological study of measurement of absorption cross section of NO[J].Journal of Nanjing Institute of Meteorology,2011(2):142-146. |
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| Authors: | ZHANG Yingchao MIAO Feng |
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| Abstract: | Differential optical absorption spectrometry(DOAS) has been widely used for various polluting gas concentration measurement,which influence the measurement precision of the main factor is gas absorption section measurement.This paper using Lambert Beer absorption law and the design of my own measuring device measuring the Absorption Cross Section of NO,and used polynomial fitting method to remove the Rayleigh scattering,Mie scattering and molecular absorption,including broadband slowly varying spectrum in the Differential absorption spectrum of NO,improves the accuracy of measurement.Then using least square method inversion gas concentrations.The author inverted gas chroma value of different concentrations NO according to the measured absorption section,and achieved good effect.But this method have not obtained very ideal effect in the low concentrations,therefore,the author next work is to improve the measuring precision of the absorption cross section and inversion precision of the gas absorption cross section. |
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| Keywords: | differential optical absorption spectrometry (DOAS) NO gas absorption cross section polynomial fitting method |
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