Near-infrared trace CH<sub>4</sub> gas sensor based on TDLAS-WMS

LI Li

doi:10.13873/j.1000-9787(2014)08-0090-04

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Near-infrared trace CH₄ gas sensor based on TDLAS-WMS

更新时间：2025-09-11

- Near-infrared trace CH₄ gas sensor based on TDLAS-WMS
- Vol. 33, Issue 8, Pages: 90-93(2014)
- 作者机构：
  
  长春工业大学人文信息学院
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-9787(2014)08-0090-04
  CLC： TD712.55;TP212
- Published：2014
- 稿件说明：
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[1]李丽.基于TDLAS-WMS的近红外痕量CH_4气体传感器[J].传感器与微系统,2014,33(08):90-93.

LI Li. Near-infrared trace CH₄ gas sensor based on TDLAS-WMS[J]. 2014, 33(8): 90-93.
[1]李丽.基于TDLAS-WMS的近红外痕量CH_4气体传感器[J].传感器与微系统,2014,33(08):90-93. DOI： 10.13873/j.1000-9787(2014)08-0090-04.

LI Li. Near-infrared trace CH₄ gas sensor based on TDLAS-WMS[J]. 2014, 33(8): 90-93. DOI： 10.13873/j.1000-9787(2014)08-0090-04.

摘要

为了对煤矿CH4气体进行实时监测

基于混合可调谐二极管激光吸收光谱（TDLAS）与波长调制光谱（WMS）的检测技术

采用中心波长为1.65μm的分布反馈（DFB）激光器

设计并研制出痕量CH4气体传感器。利用自主设计的DFB激光器温度控制器

通过调节激光器工作温度

进而使其发光光谱扫描CH4气体的吸收跃迁谱线。同时利用WMS检测技术将待测信号频率移至高频区

减小1/f噪声。利用该痕量CH4气体传感器

在被测气体体积分数为（0

06）×10-6的范围内

对二次谐波信号进行了提取。测试结果显示:在（0

06）×10-6范围内相对测量误差小于7%

检测下限为11×10-6。同时

研究人员可以通过更换其他波长的激光器

实现对其他气体的检测。

Abstract

In order to monitor CH4 gas in real-time under coal-mine

design

research and fabricate trace CH4 sensor using distributed feedback（DFB） laser with centre wavelength of 1.65 μm

which is based on tunable diode laser absorption spectroscopy（TDLAS） and wavelength modulation spectroscopy（WMS） detecting technology.The spectrum of DFB laser can scan CH4 transition absorption spectrum through adjusting working temperature of DFB laser utilizing independent design DFB laser temperature controller.In order to decrease the 1/f noise

WMS detection technique is utilized to transfer the detection signal into high frequency region.The trace CH4 sensor is applied to e

xtract the second harmonic signal within the detection range of（0

106） ×10-6.Detection results show that the relative detection error is less than 7 % within the detection range of（0

106） ×10-6and the lowest detection is 11 × 10-6.Meanwhile

the researchers can detect other gases through replacing lasers with different wavelength.

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references

微气体传感器结构设计和优化 [J]. 张晓波,陕皓,刘丽,王连元,李守春,王国光. 传感器与微系统 . 2013(01)

高稳定、强鲁棒性DFB激光器温度控制系统 [J]. 陈晨,党敬民,黄渐强,王一丁. 吉林大学学报(工学版) . 2013(04)

红外气体传感器中光源恒功率控制电路的设计 [J]. 杨帮华,丁丽娜,张永怀. 传感器与微系统 . 2012(05)

Near infrared diode laser spectroscopy of C 2 H 2 , H 2 O, CO 2 and their isotopologues and the application to TDLAS, a tunable diode laser spectrometer for the martian PHOBOS-GRUNT space mission [J] . G. Durry,J. S. Li,I. Vinogradov,A. Titov,L. Joly,J. Cousin,T. Decarpenterie,N. Amarouche,X. Liu,B. Parvitte,O. Korablev,M. Gerasimov,V. Zéninari. Applied Physics B . 2010 (1)

Atmospheric pressure fabrication of SnO 2 -nanowires for highly sensitive CO and CH 4 detection [J] . Sensors & Actuators: B. Chemical . 2009 (1)

Sn/In/Ti nanocomposite sensor for CH 4 detection [J] . Bai Shouli,Chen Liangyuan,Yang Pengcheng,Luo Ruixian,Chen Aifan,Chung Chiun Liu. Sensors & Actuators: B. Chemical . 2008 (1)

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Near-infrared trace CH4 gas sensor based on TDLAS-WMS

DOI：10.13873/j.1000-9787(2014)08-0090-04

摘要

Abstract

关键词

Keywords

references

Near-infrared trace CH₄ gas sensor based on TDLAS-WMS