中文摘要：

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%.

英文摘要：

In order to reduce the second rescue injuries and deaths after the mashgas exploding in the mine,a portable imaging interferometer system is designed to detect CO temperature and concentration by the passive and remote measurement.The CO temperature and concentration are detected according to the rotational spectral line of CO gas molecule and the linear relationship between the radiation intensity of gas molecule and the molecule number density,respectively.The optical system is designed,and then its forward is studied in this work.The forward expression is obtained after studying the following four seed models of the optical system： the radiation model of target gas,where CO six emission spectral lines R11-16 are selected from HITRAN08 database; the mine CO gas transmission model in which the absorptions by the water vapor and CO_2 molecule,and absorption and scattering by the mine aerosol are calculated by the relevant rules; the filter function model,in which the matched parameters of the band width of 0.5 nm and max transmittance of 0.23 for CO temperature are measured by the method of rotational line of R11-16,and the model of imaging detector CCD in which the infrared CCD of pixel 320×320 and the max quantum efficiency of 0.75 are to be used in the optical system.According to the given parameters and MATLAB programming,the forward imaging interference results of CO differentiable six spectrum of R11-16 are obtained.The forward max noise-signal ratio is 268 when the exposure time is 300 s.The max electric count is 1.5×10^5 that is larger than the selected CCD dark noise of 400 e but less than the CCD full charge quantity of 1×10^6 e.The forward result clearly indicates that the optical system can meet the initial design demand.The accuracies of CO temperature and concentration measured by this optical system can reach 2 K and 0.1%,respectively.This portable system can be used to detect not only the mine CO,but also other gases like the pipe smoke,bomb exploding gas,etc.in which the filter and CCD need