非色散光学法NO2浓度测量技术研究

大气与环境光学学报 ›› 2014, Vol. 9 ›› Issue (4): 275-279.

非色散光学法NO2浓度测量技术研究

李加云，司福祺，窦科，周海金

（中国科学院安徽光学精密机械研究所环境光学与技术重点实验室，安徽合肥 230031）

收稿日期:2014-01-07 出版日期:2014-07-24 发布日期:2014-07-24
通讯作者: 李加云（1987-），女，山东日照市人，研究生，主要研究方向为环境监测领域的计算机应用技术. E-mail:jyli@aiofm.ac.cn
作者简介:李加云（1987-），女，山东日照市人，硕士研究生，主要研究方向为环境监测领域的计算机应用技术.
基金资助:
国家自然科学基金（41275037）资助

Technique of NO2 Measurement by Non-Dispersive Optical Method

LI Jia-yun, SI Fu-qi, DOU Ke, ZHOU Hai-jin

（Key Laboratory of Environment Optics and Technology, Anhui institute of Optics and Fine Machanics, Chinese Academy of Sciences, Hefei 230031, China）

Received:2014-01-07 Published:2014-07-24 Online:2014-07-24

摘要/Abstract

摘要：

主要研究了一种利用非色散光学法进行NO2浓度检测的技术，其基本原理是利用NO2在紫外可见光波段有较强吸收的特点，根据朗伯-比尔定律通过预先标定好的气体吸收率与浓度的关系曲线来推导气体浓度信息。在实验室使用光谱仪、氙灯和已知浓度的一系列标准样气进行实验，从光谱仪测得的290~410 nm范围的光谱数据中选取带宽为5 nm的四个波段，分别计算不同气体浓度下的吸收率，然后分别与浓度作多项式拟合。通过对比不同波段范围和拟合阶次下的拟合相关系数，确定了一个拟合效果最好的波段和拟合阶次，为滤光片的选择提供了依据。

关键词: 非色散光学法, NO2浓度, 标定, 朗伯-比尔定律

Abstract:

A new technology of NO2 concentration measurement based on the non-dispersive optical method is studied. On the basis of intensive absorption of NO2 in the ultraviolet-visible waveband, and according to the Lambert-Beer's law, the concentration of NO2 can be derived by the relation curve of gas absorption rate and concentration calibrated in advance. The spectrometer, xenon lamp and a series of standard sample gas were used in the laboratory experiment. Four wavebands of 5 nm bandwidth were abstracted from the spectral data of 290~410 nm from spectrometer measurement, the absorption rates of in different concentrations were calculated, and the polynomial fitting with gas concentration was made. The fitting correlation coefficients in different wavebands and fitting orders were compared, the best waveband and fitting order were obtained, and the selection basis of filter was provided.

Key words: non-dispersion optical method, NO2 concentration, calibration, Lambert-Beer law

中图分类号:

O433.51

李加云司福祺窦科周海金. 非色散光学法NO2浓度测量技术研究[J]. 大气与环境光学学报, 2014, 9(4): 275-279.

LI Jia-Yun, SI Fu-Qi, DOU Ke, ZHOU Hai-Jin. Technique of NO2 Measurement by Non-Dispersive Optical Method[J]. Journal of Atmospheric and Environmental Optics, 2014, 9(4): 275-279.

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