被动遥测矿井CO气体温度及浓度的正演研究

发布时间：2018-05-23 11:56

本文选题：瓦斯气体CO + 温度　；参考：《物理学报》2016年18期

【摘要】：为减少矿井瓦斯气体爆炸后的二次救援伤亡,我们设计了一套成像干涉光学系统,可以便携实时被动遥感探测瓦斯气体CO的温度和浓度.该系统根据分子转动谱线测温和气体辐射光强与分子数密度的函数关系测浓度.本文研究该系统的正演模式,依次对"目标气体的辐射模型、气体的传输模型、滤波函数模型和CCD成像探测器模型"等4种子模型进行研究后,得到正演公式.根据所给相关参数和MATLAB编程,得到CO气体R11—R16的6条谱线的成像干涉正演图像.曝光时间300 s时,正演图像最大信噪比为268,CO成像干涉图信号强度的电子计数最大值为1.5×10~5,大于所选CCD探测器的400个电子计数暗噪声,而小于其满井电荷量1×10~6.正演结果表明该光学系统可达探测要求.该系统探测CO气体的温度和浓度精度分别可达2 K和0.1%.
[Abstract]:In order to reduce the secondary rescue casualties after mine gas explosion, we designed an imaging interferometric optical system, which can detect the temperature and concentration of gas CO by portable real-time passive remote sensing. The system measured the concentration according to the function relationship between the molecular number density and the radiation intensity of the gas. In this paper, the forward model of the system is studied, and four submodels, such as the radiation model of the target gas, the transmission model of the gas, the filter function model and the CCD imaging detector model, are studied in turn, and the forward formula is obtained. According to the relevant parameters and MATLAB programming, the imaging interference forward images of 6 spectral lines of CO gas R11-R16 are obtained. When the exposure time is 300 s, the maximum signal to noise ratio of the forward image is 1. 5 脳 10 ~ (5), which is larger than the 400 electrons count dark noise of the selected CCD detector, but less than 1 脳 10 ~ (6) of its full well charge. The forward simulation results show that the optical system can meet the detection requirements. The temperature and concentration accuracy of the system can reach 2 K and 0.1 K respectively.
【作者单位】：西安理工大学理学院;
【基金】：国家自然科学基金(批准号:61308006) 陕西自然科学基金(批准号:2016JM1011) 西安理工大学特色项目(批准号:2015TS012)资助的课题~~
【分类号】：TD711

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