Experiment research on ellipsoidal structure methane using the absorption characteristics of 3.31 μm mid-infrared spectroscopy

被引：11

作者：

Zhang Yu ^{[2
,3
]}

Wang Fang-rong ^{[1
]}

Zhao Yan-hui ^{[4
]}

Wang Yi-ding ^{[2
]}

Cui Tian ^{[3
]}

Kan Ru-wen ^{[1
]}

Wu Li-chun ^{[3
]}

Zhang Tie-qiang ^{[3
]}

Zhang Yuan-kun ^{[5
]}

机构：

[1] Jilin Univ, Coll Commun Engn, Changchun 130022, Peoples R China

[2] Jilin Univ, State Key Lab Integrated Optoelect, Coll Elect Sci & Engn, Changchun 130012, Peoples R China

[3] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Peoples R China

[4] Penn State Univ, Dept Engn Sci & Mech, University Pk, PA 16802 USA

[5] Univ Wollongong, Fac Engn, Wollongong, NSW 2522, Australia

来源：

INFRARED PHYSICS & TECHNOLOGY | 2012年 / 55卷 / 04期

基金：

中国国家自然科学基金; 美国国家科学基金会; 国家高技术研究发展计划(863计划);

关键词：

Methane; Infrared absorption spectra; Differential detection; Temperature measurement; DIODE; LASER;

D O I：

10.1016/j.infrared.2012.02.006

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The intensity distribution of absorption spectroscopy of methane mid-infrared fundamental absorption bands, near-infrared combination band of nu 3(2) + 2 nu(3) and overtone band of 2 nu(3) were discussed in details in this paper. Quantitative data showed that the absorption intensities of fundamental bands are twice larger than overtone bands, and three times larger than combination bands. Based on the methane 3.31 mu m (nu(3)) fundamental absorption bands and differential signal disposal method, a rotational ellipsoidal light structure was designed using ordinary light source and detector to improve gas detection sensitivity. The experimental results of concentration detection showed that the precision of concentration measurement can reach 3% and detection sensitivity is 50 ppm. Meanwhile, experiment was performed to investigate the influence of temperature on mid-infrared absorption performance of methane and the experience curve of 3.31 mu m (nu 3) fundamental absorption signal depending on temperature and its rate of change was drawn. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：353 / 356

页数：4

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