摘要
设计了一套基于红外热辐射光源的光声光谱多组分气体分析仪。通过分析多组分气体间交叉干扰的主要因素以及特征气体的红外吸收谱线,确定了中红外带通滤光片的参数。利用标准气体对设计的光声光谱仪进行标定,研究了待测气体之间交叉干扰的定量关系,并利用湿度发生器对装置受到水气干扰情况进行分析。实验结果表明,C_(2)H_(2)对CH_(4)、CH_(4)对C_(2)H_6的干扰水平分别达到10.49μV/(μL/L)、18.66μV/(μL/L),其他烃类气体间的干扰可以忽略。CO_(2)对CO、CH_(4)、C_(2)H_(2)和C_(2)H_(4)干扰响应度分别为1.615μV/(μL/L)、0.055μV/(μL/L)、0.130μV/(μL/L)以及0.016μV/(μL/L)。此外,水气对C_(2)H_(2)、CH_(4)、C_(2)H_6、C_(2)H_(4)、CO和CO_(2)都会产生一定的干扰,干扰的响应度分别为0.591μV/(μL/L)、0.421μV/(μL/L)、0.071μV/(μL/L)、0.007μV/(μL/L)、0.051μV/(μL/L)和0.055μV/(μL/L)。实验结果表明C_(2)H_(2)对CH_(4)、CH_(4)对C_(2)H_6、CO_(2)对CO以及高浓度水气对其他气体的检测会产生较高水平的干扰,在测量过程中应当考虑扣除。
A photoacoustic spectroscopy multi-gas detection system based on infrared heat radiation light source was developed.The broadband mid-infrared thermals radiation source and band-pass filter were used to generate the photoacoustic excitation light.Combined with a small-volume non-resonant photoacoustic cell,the time-sharing measurement of multi-component gas concentration was realized.The parameters of the mid-infrared bandpass filter were determined by analyzing the main factors of crossinterference among multi-component gases and the infrared absorption spectrum of target gases.To determine the quantitative relationship of cross interference among the gases to be measured,the photoacoustic spectrometer system was calibrated by using the standard gas,and a humidifier was used to analyze the interference from water vapor.The experimental results showed that the interference levels of C_(2)H_(2) to CH4 and CH4 to C2H6 reached 10.49μV/(μL/L)and 18.66μV/(μL/L)respectively,and the interference between other hydrocarbon gases can be ignored.The responsiveness of CO_(2) to CO,CH4,C_(2)H_(2) and C_(2)H_(4) interference was 1.615μV/(μL/L),0.055μV/(μL/L),0.130μV/(μL/L)and 0.016μV/(μL/L),respectively.In addition,water vapor will cause certain interference to C_(2)H_(2),CH4,C2H6,C_(2)H_(4),CO and CO_(2),and the responsiveness of the interference was 0.591μV/(μL/L),0.421μV/(μL/L),0.071μV/(μL/L),0.007μV/(μL/L),0.051μV/(μL/L)and 0.055μV/(μL/L).The experimental results indicated that there was a high level of interference when detecting CH4 in C_(2)H_(2) background,C2H6 in CH4 background,CO in CO_(2) background,and other target gases in high concentration water vapor background,which should be considered in the measurement process.
作者
袁帅
王广真
付德慧
陈珂
安冉
张博
郭珉
张广寅
YUAN Shuai;WANG Guangzhen;FU Dehui;CHEN Ke;AN Ran;ZHANG Bo;GUO Min;ZHANG Guangyin(High Voltage Research Institute,China Electric Power Research Institute,Beijing 100192,China;School of Optoelectronic Engineering and Instrumentation Science,Dalian University of Technology,Dalian,Liaoning 116024,China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2021年第4期198-206,共9页
Acta Photonica Sinica
基金
国家自然科学基金(No.61905034)
国家电网公司总部科技项目(No.SGFJDK00PJJS1800018)。
关键词
光声光谱
多组分气体检测
红外光谱
交叉干扰
测量误差
Photoacoustic spectroscopy
Multi-gas detection
Infrared spectroscopy
Cross interference
Measurement error
作者简介
第一作者:袁帅(1980-),男,教授级高工,博士,主要研究方向为高电压绝缘技术和气体传感技术。Email:yuans@epri.sgcc.com.cn;通讯作者:陈珂(1988-),男,副教授,博士,主要研究方向为光纤传感和激光光谱。Email:chenke@dlut.edu.cn.
