差分光学技术的三种气体检测光学气室设计  

Design of an Optical Gas Chamber for Detecting Three Gases based on Differential Optics Technology

作　　者：余应时 吴玲玲[1] 陈靖[1] 王谦 张泽林 YU Yingshi;WU Lingling;CHEN Jing;WANG Qian;ZHANG Zelin(School of Opto electronical Engineering,Xi’an Technological University,Xi’an 710021,China)

机构地区：[1]西安工业大学光电工程学院,西安710021

出　　处：《西安工业大学学报》2025年第1期104-113,共10页Journal of Xi’an Technological University

基　　金：陕西省重点研发计划项目(2024SF-YBXM-449)。

摘　　要：为了解决多组分气体检测的问题,基于非色散红外(NDIR)传感技术提出了一种气室结构设计方案。方案采用单光源多探测器配置,以实现对CO_(2)、CO和CH_(4)混合气体的同时检测。通过光线追迹的方法,对气室光耦合效率、光程和照度进行分析。结果表明:在同等情况下,与同类型相比,文中的气室结构性能均有所提升,气室的光耦合效率提高了10%,加权平均光程长度提高了42%,信噪比提高了100倍,并且气室尺寸更小,照度分布均匀。因此,该气室结构对于多组分气体传感器的发展有着重要的意义。A gas chamber structure is designed for the detection of multi component gases based on Non Dispersive Infrared(NDIR)sensing technology.In this design,a single infrared light source is configured with multiple detectors to realize the simultaneous detection of a mixed gas comprising CO_(2),CO,and CH_(4).Ray tracing methods are employed to analyze the gas chamber’s light coupling efficiency,optical path length,and illumination distribution.The findings reveal that,under the same conditions,the gas chamber designed in this paper outperforms the comparable models in several aspects.Its optical coupling efficiency is increased by 10%,the weighted average optical path by 42%,and the signal to noise ratio by a factor of 100.Additionally,the size of the gas chamber is smaller and the illumination is more evenly distributed.It is concluded that this structure of the gas chamber is of great significance to the development of multi component gas sensors.

关 键 词：传感器 非色散红外检测技术 差分光学检测计技术 光学气室 光耦合效率 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]