DAS测量路径温度非均匀分布对谱线线强影响的研究  

Study on the influence of non-uniform temperature distribution on line strength of DAS measurement path

作　　者：张扬[1] 张丕状[1] 白建胜 牛瑞兴 戚俊成 Zhang Yang;Zhang Pizhuang;Bai Jiansheng;Niu Ruixing;Qi Juncheng(Key Laboratory of Information Capturing and Processing in Shanxi Province,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学信息与探测与处理山西省重点实验室,太原030051

出　　处：《国外电子测量技术》2021年第8期70-76,共7页Foreign Electronic Measurement Technology

基　　金：中北大学研究生科技基金(20201727);山西省高等学校科技创新项目(2020L0274)资助。

摘　　要：为研究直接吸收光谱法(DAS)测量路径温度非均匀分布对谱线线强的影响,通过温度分布拟合法构建了受物理条件约束的4种温度分布模型,选用1.4μm附近的两条吸收谱线,仿真研究了在4种温度分布模型下谱线吸收线强的变化规律,讨论了沿测量路径谱线吸收线强分别以路径温度积分和路径线强积分两种计算方法的谱线线强值和谱线位置与理想条件下标准值的相对误差。实验以马弗炉实际测量温度分布结合温度分布模型D,利用1392.805和1392.185 nm两条谱线,结合谱线线强路径积分公式获得温度非均匀分布环境中谱线线强随温度变化曲线,并且得到谱线交点位置变化规律,证明了在DAS计算公式中,谱线线强值需结合实际测量环境的温度分布模型讨论。Direct absorption spectroscopy(DAS) for the study of direct absorption measurement path non-uniform temperature distribution of spectral lines is strong, the influence of the temperature distribution through fitting is constructed by the physical conditions of four kinds of temperature distribution in the model, to choose the two absorption lines near 1.4 μm, simulation research in four kinds of temperature distribution in the model under the changing rule of the strong absorption line of the spectrum, discussed the measuring path line strong absorption lines with strong temperature integral path and path line integral two calculation methods of spectrum lines intensity value and the spectral line position under ideal conditions and standard value of relative error. Experiments to muffle furnace measuring temperature distribution in combination with actual temperature distribution model of D, use 1 392.805 and 1 392.185 nm two spectral lines, combined with spectral lines strong path integral formula for the non-uniform temperature distribution environment spectrum lines with the temperature change curve, the change rule and get the intersection line position, proved that the formula in the DAS, spectral lines strong values should be combined with the actual measurement environment temperature distribution in the model to discuss.

关 键 词：谱线线强 DAS 非均匀温度分布 

分 类 号：TN2[电子电信—物理电子学]