非分散红外二氧化硫浓度测试系统设计  

Design of Non-dispersive Infrared Sulfur Dioxide Concentration Test System

作　　者：王相如[1] 王志斌[1] 张记龙[1] 田二明[1] 姚娜[1] 张跃国[1] 

机构地区：[1]中北大学,仪器科学与动态测试教育部重点实验室,山西省光电信息与仪器工程技术研究中心,山西太原030051

出　　处：《仪表技术与传感器》2011年第1期42-44,共3页Instrument Technique and Sensor

基　　金：科技部国际合作项目(2010DFR10520);山西省国际合作计划(2010081038);山西省科技攻关项目(20090321044);山西省科技平台建设(2010091013);山西省研究生优秀创新项目(20081017)

摘　　要：烟道排放的二氧化硫气体对人体健康和生态环境等有着严重的危害性,因此实时检测二氧化硫气体的产生和浓度具有重要的意义。基于红外吸收检测原理,采用双波长单光路结构,设计了集光源、气室、探测器为一体的浓度测试探头,利用差分放大电路和锁相放大电路实现二氧化硫气体的浓度测量。在实验室条件下,对二氧化硫气体进行了实时连续检测,并对实验结果进行了分析和探讨。实验结果表明,该系统测量精度高,具有较好的稳定性,且结构简单易实现,可实现二氧化硫气体的实时在线检测。Sulfur dioxide gas from flue emissions has harmful effects on human health and the environment.Thus,real-time detection of sulfur dioxide gas generation and concentration has a very important significance.Based on the infrared absorption measurement theory,using a dual-wavelength and single optical path structure,a set of lights,gas chamber,detectors and integration of the sensor probes was designed.In a further step,the concentration detection of sulfur dioxide gas was realized using differential amplification circuit and lock-in amplifier circuit.Under laboratory conditions,real-time continuous detection of sulfur dioxide gas was conducted and experimental results were discussed.The experimental results show that the system has high accuracy measurement,good stability,simple structure and easy implementation.It can realize real-time on-line detection of sulfur dioxide gas.

关 键 词：浓度测试 非分散红外 红外吸收 差分技术 检测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]