| 空间双光路红外CO2气体传感器及测量模型研究 |
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| 引用本文： | 李亚萍,张广军,李庆波. 空间双光路红外CO2气体传感器及测量模型研究[J]. 光学精密工程, 2009, 17(1): 14-19 |
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| 作者姓名： | 李亚萍 张广军 李庆波 |
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| 作者单位： | 北京航空航天大学,精密光机电一体化技术教育部重点实验室,北京,100083 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 提出了一种基于空间双光路结构的红外CO2气体传感器。阐述了传感器光学探头的结构和工作原理，并给出气室的几何形状和相应的尺寸参数。以朗伯-比尔定律为理论依据，结合空间双光路结构的工作机理，以及红外光源周期性开关的工作方式，推导出了该传感器的线性测量模型，并采用最小二乘法对建立的测量模型进行标定。在静态下对该传感器的传感特性进行了测试。测试结果表明：在0~3 %的测量范围内，该传感器的实验值与真实值符合较好，其精度为2.42 %；系统运行良好，可无故障连续在线测量30天以上；所建立的测量模型能有效抑制温度信号和背景光信号对传感器的干扰，该传感器可在5~40 ℃的温度范围内、不同杂光背景下正常工作。
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| 关 键 词： | 空间双光路 红外吸收 CO2气体传感器 最小二乘法 |
| 收稿时间： | 2008-03-31 |
| 修稿时间： | 2008-05-21 |
Infrared CO_2 gas sensor based on space double beams and its measurement model |
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| LI Ya-ping,ZHANG Guang-jun,LI Qing-bo. Infrared CO_2 gas sensor based on space double beams and its measurement model[J]. Optics and Precision Engineering, 2009, 17(1): 14-19 |
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| Authors: | LI Ya-ping ZHANG Guang-jun LI Qing-bo |
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| Affiliation: | Key Laboratory for Precision Optical-mechanical-electric Integration Technology of the Ministry of Education;Beijing University of Aeronautics and Astronautics;Beijing 100083;China |
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| Abstract: | An infrared CO2 gas sensor was developed based on space-double-beam structure.First,the structure and working principle of the optical probe were introduced.A new-type gas cell was presented and the optimal size of the gas cell were calculated in detail.Then,the linear mathematical model of the sensor was established based on Lambert-Beer Law,the principle of space-double-beam optical structure and the working model of an infrared light source in turning on and off periodically.Finally,the unknown coefficie... |
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| Keywords: | space double beams infrared absorption CO2 gas sensor least squares method |
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