Research on CO<sub>2</sub> detection system based on TDLAS-WMS

Lü Shuyuan; WANG Feng; LIU Chongqi

doi:10.13873/J.1000-9787(2021)03-0052-03

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Research on CO₂ detection system based on TDLAS-WMS

更新时间：2025-09-11

- Research on CO₂ detection system based on TDLAS-WMS
- Issue 3, Pages: 52-54+57(2021)
- 作者机构：
  
  西安邮电大学电子工程学院
- 作者简介：
- 基金信息：
- DOI：10.13873/J.1000-9787(2021)03-0052-03
  CLC： O657.3;TQ116.3
- Published：2021
- 稿件说明：
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Lü Shuyuan, WANG Feng, LIU Chongqi. Research on CO₂ detection system based on TDLAS-WMS[J]. 2021, (3): 52-54+57.
DOI：

Lü Shuyuan, WANG Feng, LIU Chongqi. Research on CO₂ detection system based on TDLAS-WMS[J]. 2021, (3): 52-54+57. DOI： 10.13873/J.1000-9787(2021)03-0052-03.

摘要

采用空心光子晶体光纤（HC-PCF）作为气室

将可调谐二极管激光光谱吸收技术—波长调制技术（TDLAS-WMS）与谐波比值检测相结合

利用CO

吸收光谱中1 572.335 nm吸收峰

实现了CO

气体体积分数测量。系统采用发射波长为1573 nm

功率为1 m W的分布反馈式激光器（DFB）作为光源

5 k Hz余弦波用于波长调制

20 Hz锯齿波用于波长扫描

使用光电探测器、数据采集卡采集被气体吸收的光信号

采用基于Lab VIEW的后处理相关算法计算CO

气体体积分数。实验结果表明:在1 s内测量系统最小探测极限为25×10

-6

在31 s内可进一步提高至15×10

-6

。

Abstract

The volume fraction of CO

gas is detected using hollow-core photonic crystal fiber（ HC-PCF） as gas cell

tunable diode laser absorption spectroscopy and wave length modulation spectroscopy（ TDLAS-WMS） and harmonic ratio detection method are combined and use absorption peak of 1 572. 335 nm in CO

absorption spectrum. A 1 m W distribute feedback（ DFB） laser with an emission wavelength of 1 573 nm is used as the light source in this system. 5 k Hz cosine signal is used to wavelength modulation and 20 Hz sawtooth wave wavelength scanning. The absorbed light is detected with a photo detector and a data acquisition card. The post-proces

sing correlation algorithm based on Lab VIEW is used to calculate the CO

gas volume fraction. Experimental results indicate that the minimum detection limit of the detection system is 25 × 10

-6

with the averaging time of 1 s

and it can be further improved to 15 × 10

-6

with the averaging time of 31 s.

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⁰

Research on CO2 detection system based on TDLAS-WMS

DOI：10.13873/J.1000-9787(2021)03-0052-03

摘要

Abstract

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Research on CO₂ detection system based on TDLAS-WMS