三电极二氧化硫变送器的设计与实现  

The Development of Three-electrode Sulfur Dioxide Transmitter

作　　者：周书民[1] 管少斌[2] 金倩倩[1] 董原竹[1] 

机构地区：[1]核技术应用教育部工程研究中心(东华理工大学),南昌330013 [2]核工业航测遥感中心,石家庄050002

出　　处：《核电子学与探测技术》2013年第8期1011-1014,共4页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(11065002)

摘　　要：电化学气体传感器的输出为微安级的微电流信号,传统放大电路采用反馈电阻直接放大,对微弱信号的放大会由于运放的实际特性存在着一定误差。论文在分析了传统放大电路对微弱信号影响的基础上提出了利用T型电阻网络消除温度漂移的三电极二氧化硫变送器,可用于石油化工、城市煤气、环保等领域作业场所的有毒气体泄漏及气体浓度超标的监测中。Electrochemical gas sensor output is signal of a microampere level micro electric current , traditional amplifying circuit is direct amplification by the feedback resistance .The amplification of weak signal will cause the uncertainty due to actual operational characteristics .The paper proposes a kind of three -electrode sulfur dioxide transmitter based on eliminating of the temperature drift by T resistance network .The three-electrode sulfur dioxide transmitter can be used in the petrochemical industry , city gas, environmental protection and oth-er fields in the workplaces where toxic gas leakage and gas concentration monitoring .

关 键 词：二氧化硫变送器 气体传感器 三电极无偏置电路 

分 类 号：TM452[电气工程—电器]