目录
摘要 ..................................................................................................................................................................0
Abstract.............................................................................................................................................................1
目录 ..................................................................................................................................................................2
1 绪论 ..............................................................................................................................................................3
1.1 课题的研究背景 ......................................................................................................................................3
1.2 课题的研究目的与意义 ..........................................................................................................................4
1.3 火灾报警器的发展与现状 ......................................................................................................................4
1.4 课题的研究内容 .......................................................................................................................................5
2 火灾报警器的总体方案设计 ......................................................................................................................6
2.1 系统的功能要求 .......................................................................................................................................6
2.2 系统的技术要求 ......................................................................................................................................6
2.3 系统的组成及方案设计 ..........................................................................................................................7
3 系统的硬件设计 ..........................................................................................................................................8
3.1 主控电路 ..................................................................................................................................................9
3.2 烟雾探测电路的设计 ............................................................................................................................12
3.2.1 MQ-2 介绍 .................................................................................................................................................12
3.2.2 ADC0832 介绍 ..........................................................................................................................................14
3.3 液晶显示电路设计 ................................................................................................................................15
3.4 声光报警提示电路 ................................................................................................................................18
3.4.1 灯光提示电路 ...........................................................................................................................................18
3.4.2 声音报警电路 ...........................................................................................................................................19
3.5 温度采集电路 ........................................................................................................................................20
3.5.1 DS18B20 概述 ...........................................................................................................................................20
3.5.2 DS18B20 引脚介绍 ...................................................................................................................................21
3.5.3 DS18B20 的内部结构 ...............................................................................................................................22
3.5.4 DS18B20 的程序流程图 ...........................................................................................................................22
3.6 按键电路 ................................................................................................................................................23
4 系统的软件设计 ........................................................................................................................................24
4.1 软件介绍 ................................................................................................................................................24
4.2 系统程序流程图 ....................................................................................................................................27
5 火灾报警器的测试结果及结论 .................................................................................................................28
5.1 调试 ........................................................................................................................................................28
5.2 结论 ........................................................................................................................................................28
致谢 ................................................................................................................................................................30
参考文献 ........................................................................................................................................................31
源程序 ............................................................................................................................................................32
