摘要
以不同浓度的甲烷气体为研究对象,利用甲烷在1653.7nm处的吸收峰,搭建基于TDLAS技术的甲烷气体浓度识别系统,利用Matlab软件拟合不同配比甲烷气体浓度曲线,并用其他标准浓度气体进行精度验证。搭建的基于TDLAS技术的甲烷浓度识别系统由气体浓度配比、光电检测和信号采集处理3部分组成。使用高精度流量计,利用高纯氮气稀释高浓度甲烷配比低浓度甲烷气体作为检测气体,并通过实验数据分析配比误差。实验结果表明:搭建的基于TDLAS技术的甲烷气体浓度识别系统气体标定准确,气体浓度识别精度高。
In this paper,through taking the methane with different concentrations as the object of study and making use of methane’s absorption peak at 16543.7nm,the methane concentration recognition system based on TDLAS technology was established;and Matlab software was used to fit straight lines of methane concentration at different ratios and other standard concentrations were adopted for the accuracy verification.The TDLAS-based methane concentration identification system established consists of three parts,i.e.the gas concentration ratio system,photoelectric detection system and the signal acquisition and processing system.Employing high-precision flowmeter and making use of high-purity nitrogen to dilute the high-concentration methane to the low concentration methane gas,and then analyzing the matching error by experimental data showed that,the TDLAS-based methane concentration identification system can accurately calibrate the methane gas and has high accuracy in gas concentration identification.
作者
阚玲玲
叶蕾
王喜良
陈建玲
宋福政
KAN Ling-ling;YE Lei;WANG Xi-liang;CHEN Jian-ling;SONG Fu-zheng(School of Electrical Engineering and Information,Northeast Petroleum University;Press Shop,SAIC-GM Dong Yue Motors Co.,Ltd.;Tianjin Branch,CNOOC China Limited;No.1 High Production Team of No.5 Oilfieldin No.5 Oil Production Plant,Daqing Oilfield Co.,Ltd.)
出处
《化工自动化及仪表》
CAS
2021年第2期122-127,133,共7页
Control and Instruments in Chemical Industry
基金
黑龙江省自然科学基金项目(LH2020F005)
东北石油大学“国家基金”培育基金项目(2018GPYB-03)。
关键词
可调谐二极管激光吸收光谱
二次谐波
气体浓度标定
识别
tunable diode laser absorption spectroscopy(TDLAS)
second harmonics
gas concentration calibration
recognition
