Design and implementation of trace N2O detection system

ZHENG Shou-guo; LI Miao; ZHANG Jian; ZHANG Hao-dong; HU Ze-lin

doi:10.3788/OPE.20122010.2154

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Design and implementation of trace N₂O detection system

Article | 更新时间：2020-08-12

- Design and implementation of trace N₂O detection system
- Optics and Precision Engineering Vol. 20, Issue 10, Pages: 2154-2160(2012)
- 作者机构：
  
  1. 中国科学院安徽光学精密机械研究所,安徽合肥,230031
  2. 中国科学院合肥智能机械研究所,安徽合肥,230031
  3. 无锡中科智能农业发展有限公司,江苏无锡,214105
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20122010.2154
  CLC： X831;O657.319
- Received：14 May 2012，
  
  Revised：02 July 2012，
  
  Published：10 October 2012
- 稿件说明：
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郑守国, 李淼, 张健, 张浩东, 胡泽林. 痕量N2O气体检测系统的设计与实现[J]. 光学精密工程, 2012,20(10): 2154-2160

ZHENG Shou-guo, LI Miao, ZHANG Jian, ZHANG Hao-dong, HU Ze-lin. Design and implementation of trace N2O detection system[J]. Editorial Office of Optics and Precision Engineering, 2012,20(10): 2154-2160
郑守国, 李淼, 张健, 张浩东, 胡泽林. 痕量N2O气体检测系统的设计与实现[J]. 光学精密工程, 2012,20(10): 2154-2160 DOI： 10.3788/OPE.20122010.2154.

ZHENG Shou-guo, LI Miao, ZHANG Jian, ZHANG Hao-dong, HU Ze-lin. Design and implementation of trace N2O detection system[J]. Editorial Office of Optics and Precision Engineering, 2012,20(10): 2154-2160 DOI： 10.3788/OPE.20122010.2154.

摘要

建立了基于光谱吸收技术的检测系统

用于快速、准确地测量N

O气体浓度。首先

从理论上证明了二次谐波、一次谐波与N

O气体浓度之间的关系;然后

设计了痕量N

O气体浓度检测系统

利用光源调制、锁相放大等技术

实现了强杂波背景下气体浓度弱信号的解析;最后

实验测试了系统的检测性能、抗干扰能力及检测结果的可重复性。测试结果表明

系统能够在0~1%有效检测N

O气体浓度

检测下限为5.010

-5

相对检测误差为0.11%

检测结果线性方程为

=192.699 09

-0.006 24

线性度为0.998 07。多次检测实验表明

系统相对标准偏差为0.137%

、O

、水蒸气等常见气体对检测结果无影响。改变激光器的中心波长

该方法亦可用于CO

等其它温室气体的检测。

Abstract

A measurement system based on the spectral absorption was established to measure the N

O concentration accurately.First

the relationship of the second-harmonic

the first-harmonic with N

O gas concentration was demonstrated in theory. Then

a N

O detection system for trace concentration was designed based on a Distribute Feedback Laser(DFB).By using the light modulation and lock-in amplifier technologies

weak gas concentration signals in the strong clutter background were analyzed. Finally

the detection performance

anti-jamming capability and the repeatability of test results were verified through experiments. Test results indicate that the system can offer the measuring range from 0 to 1%

detection limit of 5.010

-5

and the relative detection error of 0.11%. Furthermore

the linear equation is

=192.699 09

-0.006 24

the linearity is 0.998 07

and the relative standard deviation is 0.137%.It also proves that the CO

water vapor

et al

. have no effect on the experimental results. By changing the centre wavelength of the laser

the system can be used in the detection of other greenhouse gases

such as CO

and CH

关键词

Keywords

references

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