瓦斯探测器零点校正技术的研究  

Research on zero-point correction technique of gas detector

作　　者：于春雨[1] 潘春鹤[1] 于晓霞[1] 张光臻[1] 

机构地区：[1]哈尔滨理工大学测控技术与仪器省高校重点实验室,黑龙江哈尔滨150080

出　　处：《传感器与微系统》2012年第4期30-32,共3页Transducer and Microsystem Technologies

基　　金：国家"863"计划资助项目(2006AA040601)

摘　　要：针对目前广泛使用的瓦斯探测器漂移大、成本高、维护周期短等问题,提出了基于恒温控制电路的瓦斯探测器的定时自动零点校正方法。该方法以催化燃烧式气体传感器为对象,采用恒温控制电路为传感器供电,以零点漂移的理论分析和大量实验研究工作为依据,解决了该类探测器长期未能解决的零点稳定性问题。采用模拟电子开关配合电阻网络实现数字电位器设计,节约了成本。实验结果表明:采用恒温控制电路的零点校正后的残留偏差比未经校正的输出值减少了近1个数量级,为设计具有自动定时调零功能的瓦斯探测器提供了技术支持。Aiming at the problems such as large drift,high costs and short maintenance intervals of the extensively used gas detectors at the current stage,the timing automatic zero-point correction approach based on the thermostatic control circuit is presented.This approach uses the catalytic combustion gas sensor as targets,adopts the thermostatic control circuit to provide power for sensors,takes the theoretical analysis of zero drift and large quantities of experimental research as the basis and solves the problem of zero stability of this type of detectors which had not been solved for a long time.It employs the analog electronic switch to match resistance network to realize digital potentiometer design and saves costs.The experimental results demonstrate that the residual deviation of the thermostatic control circuit after zero correction reduces one order of magnitude than the output value without correction and provide technical support for the design of gas detectors which have the function of automatic timing zero setting.

关 键 词：探测器 零点校正 零点漂移 瓦斯 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]