摘要
为了减少我国中小型煤矿因瓦斯爆炸而引发的灾难事故,利用以SnO2为主要基体材料的N型半导体气敏传感元件对甲烷等易燃易爆气体具有良好的敏感特性,采用QM-N5型半导体气敏传感器,检测该传感器在不同瓦斯浓度下输出电阻值的变化,并设计了以AT89C51数字芯片为核心的电路处理硬件结构,对输入电阻值进行逻辑判断和分析,从而实现对瓦斯浓度超限的监控与报警。试验测试表明,该新型监测装置采用模块化程序结构设计方法,具有结构简单、检测精度高、响应速度快、性能稳定、成本价低等优点,可广泛适用于我国中小型煤矿瓦斯浓度的监测与预警。
In order to reduce the disaster accidents occurred by the gas explosion in small and medium mines in China,the N type semiconductor gas sensor with SnO2 as the main basic material had an excellent sensitive feature of the methane and other easy combusted and easy explosive gas.The QM-N5 type semiconductor gas sensor could be applied to detect the variation of the output resistance value under the different gas content.The paper had a design on the circuit treatment hardware structure with AT89C51 digital ch...
出处
《煤炭科学技术》
CAS
北大核心
2008年第11期89-91,10,共4页
Coal Science and Technology
基金
国家安全生产监督管理总局科技发展计划资助项目(06-399)
湖南省科技计划资助项目(05FJ4071)
关键词
瓦斯浓度检测
半导体气敏传感器
中小型煤矿
单片机
gas contraction detection
semiconductor gas sensor
small and medium coal mines
single-chip micro-processor
