Study on restrain optical fiber gas sensor frequency deviation based on wavelength modulation spectroscopy

CAO Jia-nian; ZHANG Ke-ke; YANG Rui; SHI Jian-zhong

doi:10.13873/j.1000-97872010.04.029

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Study on restrain optical fiber gas sensor frequency deviation based on wavelength modulation spectroscopy

更新时间：2025-09-11

- Study on restrain optical fiber gas sensor frequency deviation based on wavelength modulation spectroscopy
- Vol. 29, Issue 4, Pages: 71-73+77(2010)
- 作者机构：
  
  哈尔滨工程大学信息与通信工程学院
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-97872010.04.029
  CLC： TP212.14
- Published：2010
- 稿件说明：
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[1]曹家年,张可可,杨蕊,石建中.基于WMS光纤气体传感器频率偏差的抑制[J].传感器与微系统,2010,29(04):71-73+77.

CAO Jia-nian, ZHANG Ke-ke, YANG Rui, et al. Study on restrain optical fiber gas sensor frequency deviation based on wavelength modulation spectroscopy[J]. 2010, 29(4): 71-73+77.
[1]曹家年,张可可,杨蕊,石建中.基于WMS光纤气体传感器频率偏差的抑制[J].传感器与微系统,2010,29(04):71-73+77. DOI： 10.13873/j.1000-97872010.04.029.

CAO Jia-nian, ZHANG Ke-ke, YANG Rui, et al. Study on restrain optical fiber gas sensor frequency deviation based on wavelength modulation spectroscopy[J]. 2010, 29(4): 71-73+77. DOI： 10.13873/j.1000-97872010.04.029.

摘要

利用波长调制光谱（WMS）技术的光纤气体传感器进行痕量气体体积分数检测可以达到很高的检测灵敏度

离散数据采样过程中很难保证严格在吸收线中心频率处采样

频率偏差会使检测结果产生严重偏差。利用傅里叶级数展开分析WMS各次谐波信号

在采样过程中通过测量一次谐波的最大值与最小值取平均

获取与待测气体体积分数无关的一次谐波基线值

抑制频率偏差对系统检测精度的影响。以二次谐波峰值与一次谐波基线的比值作为系统的输出

有效地消除光强波动等因素带来的干扰。

Abstract

The detection sensitivity of trace gas concentrations using optical fiber gas sensor based on wavelength modulation spectroscopy is very high.In the discrete sampling process

it is difficult to sampling in the center frequency of absorption line.Frequency deviation would cause serious deviation of test result.Fourier series expansion is used to analyze wavelength modulation spectroscopy.WMS signal

the first harmonic baseline is detected by the average value of maximum and minimum to restrain the influence of frequency deviation on measurement precision of the system

which has nothing to do with gas volume fraction.The ratio of second harmonic peaks and first harmonic baseline as system output which eliminate the interference of optical intensity fluctuations.

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references

基于可调谐二极管激光光谱技术的火焰CO 2 浓度检测方法研究 [J]. 王晓梅,张玉钧,夏慧,方曦,阚瑞峰,王铁栋,刘文清,刘建国. 大气与环境光学学报 . 2007(04)

光纤甲烷气体传感器的研究 [J]. 王书涛,车仁生,王玉田,张洁,张景超. 仪器仪表学报 . 2006(10)

Gas monitoring in the process industry using diode laser spectroscopy [J] . I. Linnerud,P. Kaspersen,T. Jaeger. Applied Physics B Lasers and Optics . 1998 (3)

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