中红外激光吸收光谱CO检测系统软件设计  

Software design of infrared laser absorption spectroscopy CO detection system

作　　者：鲁一冰 刘文清[1,2] 张玉钧[1,2] 何莹 张恺[1,2] 尤坤[1,2] 刘国华[1,2] 唐七星 范博强[1,2] 余冬琪[1,2] Lu Yibing;Liu Wenqing;Zhang Yujun;He Ying;Zhang Kai;You kun;Liu Guohua;Tang Qixing;Fan Boqiang;Yu Dongqi(Key Laboratory of Environmental Optics ＆ Technology,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院环境光学与技术重点实验室安徽光学精密机械研究所,合肥230031 [2]中国科学技术大学,合肥230026

出　　处：《电子测量技术》2018年第14期102-107,共6页Electronic Measurement Technology

基　　金：国家重点研发计划项目(2016YFC0201000);安徽省科技重大专项(15czz04124)资助

摘　　要：一氧化碳（CO）是工业生产中重要的原料气体之一,但由于其易燃、易爆,同时具有毒性,故实现CO浓度的实时在线测量可保障生产中的安全。研制了中红外波段（2 333nm）的基于可调谐半导体激光吸收光谱技术的CO浓度实时在线检测系统,并使用LabVIEW语言开发了系统上位机软件。软件可实现光谱数据的高速采集、通过多项式拟合实现光谱背景基线扣除、基于Levenberg-Marquardt算法完成吸光度的洛伦兹线型拟合、吸光度曲线积分浓度计算、历史数据回溯等功能。实验中通过配制不同浓度的CO气体验证所搭建系统的精度,并得到系统最低检测限为0.36mg/L。Carbon monoxide（CO）is one of the important raw material gases in industrial production.However,because it is inflammable,explosive and toxic,it is necessary to conduct real-time online measurement of CO concentration to ensure safety in production.A real-time online detection system for CO concentration based on tunable diode laser absorption spectroscopy at the mid-infrared wavelength 2 333 nm has been developed,and a system upper computer is developed with LabVIEW language.Upper computer software can realize the high-speed data acquisition of spectrum,and realize spectrum background baseline deduction through polynomial fitting.The absorbance voigt linear fitting,absorbance curvilinear integral concentration calculation and historical data backtracking are completed through Levenberg-Marquardt algorithm.The accuracy of the constructed system has been verified by compounding CO gas of different concentrations in the experiment,and the minimum detection limit of the system is 0.36 ppm.

关 键 词：可调谐半导体激光吸收光谱技术 CO浓度实时在线反演 LabVIEW软件设计 

分 类 号：TN21[电子电信—物理电子学]