自动校零瓦斯传感器  

Methane Sensors with Zero Self adjustment

作　　者：王汝琳[1] 赵钢[1] 

机构地区：[1]中国矿业大学北京校区,北京100083

出　　处：《煤矿自动化》2000年第2期8-10,共3页Coal Mine Automation

基　　金：煤炭科研基金

摘　　要：通过对瓦斯检测原理的深入研究 ,将智能化仪器仪表的自动零点校正原理应用于井下瓦斯检测系统中 ,设计了具有定时自动校零功能的新型瓦斯检测仪器。自动校零的主要原理 :每经过一段合理的时间间隔后 ,采用多路转换开关调整降低元件工作电流到工作点以下 ,使其在短时期内不工作。通过这种方法模拟大气环境下的正常校零过程 ,并在以后瓦斯浓度的检测中加以补偿。经测试验证 ,采用的自动校零原理完全可行 ,系统运行稳定 ,性能良好。Based on the theory research of gas detection, using the zero self adjustment theory to underground gas detectioin, this paper is mainly about the designing and exploiting of a brand new gas detection instrument with zero self adjustment. The main point in zero self adjustment is to reduce the sensor's working current right under its working point by MUX switching after each certain period of time in order to stop its working procedure for a short time. In this way, we can simulate the normal zero adjustment in air by taking down the data of “zero” at this time and compensate the following data with this “zero”. The theory and the experiments of zero self adjustment used in this paper show the complete feasibility and the stable work performance.

关 键 词：瓦斯传感器 零点校正 补偿 自动化 瓦斯测量仪 

分 类 号：TD712.55[矿业工程—矿井通风与安全] TD679