Study on Application Fourier Transform Filter to Differential Optical Absorption Spectroscopy

摘要：

The DOAS (Differential optical absorption spectroscopy) technology is a new spectral measurement for analyzing gas concentration, using the gas narrow-band absorption characteristics. This paper makes an analysis about the mathematics method of dealing with DOAS and presents a new way of Fourier transform filtering based on the characters of absorption across-section and the absorbency for main polluted gas(SO2NO2NH3 etc), finding the best wave band for differential optical absorption spectroscopy. The gas concentration can be figured out according to the different characteristics after Fourier transform. The method is good at reducing disturb from unknown gas which has different spectrum character while with the overlapping differential absorption spectrum with SO2NO2NH3 etc. Finally, several questions were put forward about Fourier transform filter to DOAS.

关键词： Differential optical absorption spectroscopy (DOAS) Fourier Transform Filter Pollutant gas monitoring

作者: Zheng Haiming Tang GuiJi

作者单位: Department of Mechanical Engineering, North China Electric Power University, Baoding 071003

会议类型: 国际会议

会议名称: 2009年中国控制与决策会议(2009 Chinese Control and Decision Conference)

会议地点: 广西桂林

会议语种:英文

页码: 3289-3292

在线出版日期: 2009-06-17（万方平台首次上网日期，不代表论文的发表时间）