目 录
摘 要..............................................................................................................................................................I
Abstract ...........................................................................................................................................................II
1. 绪论.........................................................................................................................................................1
1.1 研究目的和意义 ...........................................................................................................................1
1.2 国内外现状和发展趋势与研究的主攻方向 ...............................................................................1
1.3 主要研究内容，关键问题的解决思路 .......................................................................................1
2. 系统方案设计.........................................................................................................................................3
2.1 温湿度控制系统的设计指标要求 ...............................................................................................3
2.2 系统设计的原则 ...........................................................................................................................3
2.2.1 可靠性...............................................................................................................................3
2.2.2 性价比...............................................................................................................................3
2.3 方案比较.......................................................................................................................................4
2.3.1 方案一...............................................................................................................................4
2.3.2 方案二...............................................................................................................................4
2.4 方案论证.......................................................................................................................................5
2.5 方案选择.......................................................................................................................................5
3. 单元模块设计.........................................................................................................................................6
3.1 各单元模块功能介绍及电路设计 ...............................................................................................6
3.1.1 单片机最小系统 ...............................................................................................................6
3.1.2 液晶显示模块 ...................................................................................................................8
3.1.3 温湿度传感器模块 ...........................................................................................................9
3.1.4 报警电路的设计 ...............................................................................................................9
3.1.5 按键电路设计 .................................................................................................................10
3.2 元件清单.....................................................................................................................................11
3.3 关键器件的介绍 .........................................................................................................................11
3.3.1 AT89C52 ...........................................................................................................................11
