大气与环境光学学报 ›› 2012, Vol. 7 ›› Issue (1): 57-62.

• 环境光学监测技术 • 上一篇    下一篇

酒精蒸汽近红外高分辨光谱获取方法研究

耿辉,张玉钧,刘文清,刘建国,阮俊,许振宇,姚路,阚瑞峰   

  1. 中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室,安徽,合肥,230031
  • 收稿日期:2011-08-31 修回日期:2011-10-24 出版日期:2012-01-25 发布日期:2011-12-27
  • 作者简介:耿辉(1981-),男,湖北襄阳人,博士生,主要从事激光光谱衡量气体检测方面的研究。
  • 基金资助:

    安徽省科技攻关项目"激光遥测酒驾预警系统研发项目"(1001130610)

Acquisition method of high resolution spectra of ethanol vapor in near-IR range

GENG Hui, ZHANG Yu-jun, LIU Wen-qing, LIU Jian-guo, RUAN Jun, XU Zhen-yu, YAO Lu, KAN Rui-feng   

  1. Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 230031, Hefei, Anhui, China
  • Received:2011-08-31 Revised:2011-10-24 Published:2012-01-25 Online:2011-12-27

摘要:

酒精是相对复杂的分子,在常压下为宽带吸收,其OH基团的泛频吸收区位于近红外7000-7300 cm-1处。利用可调谐二极管激光光谱学(TDLAS)方法测量了含有少量水汽的酒精蒸汽在7180cm-1附近的吸收谱线,通过多项式拟合消除水汽吸收谱线干扰,获得了酒精蒸汽的特征吸收光谱,其半高半宽为1.3cm-1;并对不同浓度酒精蒸汽吸收谱线线型做了研究,证明其线型与酒精分压不相关,为发展基于TDLAS酒驾遥测技术奠定了基础。

关键词: 吸收光谱, 酒精蒸汽, 可调谐二极管激光吸收光谱TDLAS, 宽带吸收, 多项式拟合

Abstract:

Ethanol is a relatively complex molecule which presents broadband absorption spectra at atmospheric pressure,its stretching overtones of OH bond is around 7000-7300 cm-1. The absorption spectrum of ethanol vapor with small amount of water vapor near 7180cm-1 was acquired by adopting tunable diode laser absorption spectroscopy (TDLAS) method, an absorption feature with HWHH of approximately 1.3cm-1 was obtained by eliminating the interference of water vapor with polynomial fitting. Study on the line-types of absorption spectra of ethanol vapor with different concentrations demonstrates that line-types have no dependence on partial pressure. This work laid the foundation for the research of ethanol remote sensing based on TDLAS.

Key words: absorption spectrum, ethanol vapor, tunable diode laser absorption spectroscopy, broadband absorption, Polynomial fitting

中图分类号: