NO快速检测光腔结构设计与光路仿真

李文; 蔡永青; 陈梦凡; 刘鹏

doi:10.13700/j.bh.1001-5965.2021.0105

NO快速检测光腔结构设计与光路仿真

doi: 10.13700/j.bh.1001-5965.2021.0105

北方工业大学机械与材料工程学院, 北京 100144

基金项目:

国家自然科学基金 51205005

北京市科技创新服务能力建设资助项目 PXM2017-014212-000013

详细信息

通讯作者:
李文, E-mail: lw@ncut.edu.cn

中图分类号: O433.1
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- 文章访问数: 214
- HTML全文浏览量: 71
- PDF下载量: 13
- 被引次数: 0
出版历程
- 收稿日期: 2021-03-03
- 录用日期: 2021-06-06
- 网络出版日期: 2021-07-30
- 整期出版日期: 2022-11-20

Optical path simulation and design of NO rapid detection optical cavity structure

School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100144, China

Funds:

National Natural Science Foundation of China 51205005

Beijing Science and Technology Innovation Service Ability Building Supporting Project PXM2017-014212-000013

More Information

Corresponding author: LI Wen, E-mail: lw@ncut.edu.cn

摘要

摘要:
根据NO与臭氧的化学发光反应机理, 提出了一种基于化学发光反应检测原理的用于NO气体快速检测的新型圆柱全反射S型光腔结构。该结构以圆柱内壁全反射S型结构为光腔模型, 采用圆柱体光源作为光散射元件, 将化学发光光线最大效率地汇聚到探测器的感光面, 增强了NO浓度测量信号, 提高了检测精度。采用光学软件ZEMAX对所提模型进行光路仿真, 通过对比分析表明, S型光腔采集光路对化学发光的采集效率为36.6%。通过实验验证, 结果表明, 在一定浓度范围内NO气体浓度与化学反应发光强度线性相关度为0.999 2, 在量程0‰~2.5‰的范围内, 检出限为0.001‰。所提模型结构简单, 满足国家标准, 为尾气在线检测提供了一种实用的设计方案。
- S型光腔结构 /
- 光路仿真 /
- NO浓度 /
- 化学发光 /
- ZEMAX
Abstract:
According to the chemiluminescence reaction mechanism of nitric oxide and ozone, a new cylindrical total reflection S-type optical cavity design for rapid detection of nitric oxide gas is proposed. The optical cavity model is based on the total reflection S-type structure on the inner wall of the cylinder. Cylindrical light source is used as the light scattering element, so the chemiluminescence light is concentrated on the photosensitive surface of the detector with maximum efficiency, which strengthens the measurement signal of nitric oxide concentration and improves the detection accuracy. Optical software ZEMAX was used to simulate the optical path of the model. The comparative analysis showed that the chemiluminescence collection efficiency of the S-type optical cavity collection path was 36.6%, and is verified by experiments. The experimental results showed that in a certain range of concentration, there is a good linear relationship between the luminescence intensity of the reaction and the concentration of NO gas. The linear correlation was 0.999 2. In the range of 0‰~2.5‰, the detection limit was 0.001‰. The model is simple in structure and meets the national standards. Moreover, it provides a practical idea of design for the on-line exhaust gas detection.
- S-type optical cavity structure /
- optical path simulation /
- NO concentration /
- chemilumine-scence /
- ZEMAX

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图 1 广口圆柱模型

Figure 1. Cylindrical wide-mouth model

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图 2 光学简化仿真模型

Figure 2. Optical simplified simulation model

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图 3 矩形探测器成像图

Figure 3. Rectangular detector imaging

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图 4 透镜聚焦式模型

Figure 4. Lens focusing model

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图 5 加透镜的矩形探测器成像图

Figure 5. Rectangular detector imaging with Lens

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图 6 圆柱全反射式模型

Figure 6. Cylindrical total reflection model

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图 7 内壁全反射的矩形探测器成像图

Figure 7. Rectangular detector imaging with total reflection of inner wall

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图 8 S型光腔结构3D模型

Figure 8. 3D model of S-shaped optical cavity structure

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图 9 S型光腔结构成像图

Figure 9. S-shaped optical cavity structure imaging

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图 10 最终仿真结果

Figure 10. Final simulation result

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图 11 双通道氮氧化物分析气路流程

Figure 11. Flow chart of two-channel NO_x analysis gas path

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图 12 NO检测工作曲线

Figure 12. Working curve of nitric oxide detection

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表 1 工作曲线相关参数

Table 1. Work curve related parameters

参数	方法或数值
检测方法	化学发光法
线性范围/‰	0~2.5
回归方程	y=0.001 26x-0.019 78
相关系数	0.999 2
最低检出限/‰	0.001

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表 2 重复性测试结果

Table 2. Repeatability test results

测试序号	NO浓度/‰
1	1.010
2	1.007
3	0.985
4	1.021
5	1.009
6	1.005
平均值/‰	1.006
标准偏差/%	1.18

下载: 导出CSV

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