CS2气体紫外差分吸收光谱的温度特性研究  

Study on Temperature Characteristics for Ultraviolet Differential Absorption Spectra of CS2 Gas

作　　者：郑海明[1] 赵朋朋 Zheng Haiming;Zhao Pengpeng(North China Electric Power University,Baoding,Hebei,071000,China)

机构地区：[1]华北电力大学能源动力与机械工程学院

出　　处：《光散射学报》2019年第2期146-151,共6页The Journal of Light Scattering

基　　金：国家重点研发计划“煤炭清洁高效利用和新型节能技术”项目(2016YFB0600701);国家自然科学基金(11174078);河北省自然科学基金(E2012502046)

摘　　要：CS2气体是一种大气恶臭污染物,也是全封闭气体绝缘组合电器故障诊断的重要特征气体。但检测环境的温度变化直接影响监测数据的准确性。研究利用CS2在紫外波段有明显的特征吸收特性,采用连续光源以及差分吸收光谱技术对不同浓度的CS2气体,在不同温度环境下进行监测。CS2气体浓度的反演采用最小二乘法,并对反演结果进行最小二乘法拟合得到温度补偿公式。实验结果显示CS2气体差分吸收强度随温度的上升呈二次曲线式减小,导致浓度误差逐渐增大,在气体浓度较低时尤为明显。将温度补偿公式用于实际浓度的测量,实验浓度的误差由补偿前的最大17%降至5%以内。CS2 gas is not only an atmospheric odor pollutant , but also a crucial characteristic gas for fault diagnosis of Gas Insulated Switchgear.However , the temperature change in the detection environment directly affects the accuracy of the monitoring data.The paper uses CS 2 gas to have noticeable characteristic absorption characteristics in the ultraviolet band. Continuous light sources and differential absorption spectroscopy techniques are utilized to monitor different concentrations of CS 2 gas at different temperatures.The inversion of the CS 2 gas concentration is carried out by the least squares method , and the inversion result is subjected to least squares fitting to obtain a temperature compensation formula.The experi - mental results show that the UV differential absorption of CS 2 gas decreases with the in - crease of temperature into a quadratic curve , resulting in a gradual increase in concentration error.This is particularly noticeable when the gas concentration is low.The temperature compensation formula is used for the measurement of the actual concentration , and the error of the experimental concentration was reduced to within 5%from the maximum 17% before compensation.

关 键 词：CS2气体 紫外差分吸收 温度特性 最小二乘法 

分 类 号：O433.1[机械工程—光学工程]