目 录
1 设计指标及要求.....................................................................................................................1
1.1 设计指标......................................................................................................................1
1.2 设计要求......................................................................................................................1
2 系统方案分析.........................................................................................................................2
2.1 系统分析......................................................................................................................2
2.2 器件选择......................................................................................................................2
2.2.1 PM2.5 传感器的选择........................................................................................2
2.2.2 电机驱动的选择...............................................................................................3
2.2.3 液晶显示器........................................................................................................3
2.2.4AT89S52 单片机.................................................................................................4
3 系统硬件电路设计.................................................................................................................5
3.1 电源电路......................................................................................................................5
3.2 电机驱动控制电路......................................................................................................5
3.3 单片机最小系统...........................................................................................................6
3.4PM2.5 传感器电路........................................................................................................7
3.5 液晶显示电路...............................................................................................................7
3.6 下载电路.......................................................................................................................8
3.7 报警电路.......................................................................................................................9
4 系统软件设计........................................................................................................................10
4.1 主程序模块.................................................................................................................10
4.2 液晶显示 LCD1602 程序...........................................................................................11
4.3 PM2.5 传感模块程序设计.........................................................................................12
5 系统调试 ..............................................................................................................................13
5.1 系统调试中出现的问题............................................................................................13
5.2 系统调试后出现的结果............................................................................................13
结 论...................................................................................................................................14
参 考 文 献.............................................................................................................................15
附录 A 系统硬件电路图.........................................................................................................16
附录 B 实物照片.....................................................................................................................17
附录 C 系统完整程序代码.....................................................................................................18
教师评语...................................................................................................................................29
