1.1瓦斯监测的现状 ....................................................................................................2
1.2瓦斯监测的发展方向 ............................................................................................2
2 总体设计方案 ..............................................................................................................3
2.1系统组成 ................................................................................................................3
2.2 工作原理 ..............................................................................................................3
3 具体实施方案 ..............................................................................................................4
3.1瓦斯检测设备 .......................................................................................................4
3.1.1瓦斯浓度检测仪的分类 ............................................................................4
3.1.2 热催化元件的结构及工作原理 ..............................................................5
3.1.3 整机的工作原理 ....................................................................................11
3.2 A/D转换电路 .....................................................................................................12
3.2.1 ADC0809的介绍.......................................................................................12
3.2.2引脚功能 ....................................................................................................12
3.2.3主要特性 ....................................................................................................13
3.3 单片机的概述 ...................................................................................................14
3.3.1 8031简介 ................................................................................................14
3.3.2单片机复位电路 ......................................................................................16
3.3.3单片机中断系统 ......................................................................................16
3.3.4 8031单片机对ADC0809的接口 ..............................................................19
3.2.5系统电源 ....................................................................................................20
3.2.6 气体传感器 ..............................................................................................21
参考文献 ..........................................................................................................................25
附录： ..............................................................................................................................26
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