基于单片机的火灾报警系统.doc

单片机火灾报警系统设计
目录
【摘要】······························································9
【关键词】····························································9
第一章绪论·····························································10
概述····································································10
火灾报警器的发展趋势····················································11
1. 3 火灾报警器的现状及特点··················································11
第二章烟雾检测报警器的方案设计·········································11
2. 1 烟雾检测报警器设计思路·················································11
2. 2 烟雾传感器的选型·······················································12
2. 烟雾传感器介绍·····················································13
2. 烟雾传感器的选定····················································14
2. 3 烟雾检测报警器整体设计方案·············································15
2. 烟雾检测报警器工作原理··············································15
2. 烟雾检测报警器的结构················································16
2. 烟雾检测报警器的功能················································16
第三章烟雾检测报警器的硬件设计·······································17
3. 1单片机的选型····················································17
单片机的选择·············································17
3. 2 烟雾检测报警器硬件电路设计··································18
3. 2. 1 信号采集及前置放大电路···································19
3. 2. 2 声音报警电路·············································20
3. 2. 3 数码管显示电路···········································21
3. 2. 4 状态指示灯及控制键电路···································22
3. 2. 5 报警器故障自诊断电路·····································23
第四章烟雾检测报警器的软件设计·······································24
4. 1 STC12系列单片机调试及开发工具················24
4. 2 烟雾检测报警器软件流程及设计·················24
4. 主程序设计及流程图·····················24
4. 主程序初始化流程图·····················25
4. 中位值平均滤波法数字滤波子程序设计及流程图·················27
4. 插值法线性化处理子程序设计及流程图·························28
4. 报警子程序设计及流程图·····································30
4. 控制按键设计子程序及流