目录
1 绪论....................................................................1
1.1 温度控制系统研究的目的和意义 ......................................1
1.2 温度控制系统研究概况 ..............................................1
1.3 温度传感器技术 ....................................................1
2 系统总体方案设计 .......................................................4
2.1 方案论证..........................................................4
2.2 系统功能介绍......................................................5
3 系统硬件电路设计........................................................7
3.1 传感器接口电路设计 ................................................7
3.1.1 温度数据采集电路.............................................7
3.2 LED 显示接口电设计 ................................................9
3.2.1 AT89C51 单片机..............................................10
3.2.2 LED 数码管..................................................12
3.3 温度控制电路的设计...............................................13
4 脉宽调制 .............................................................16
4.1 脉宽调制的介绍 ...................................................14
4.2 基本原理 .........................................................14
4.3 脉宽调制信号的设计思想...........................................15
4.4 脉宽调制信号的作用 ...............................................15
4.5 脉冲宽度调制优点 .................................................16
5 系统软件设计...........................................................16
6 系统软件调试 ..........................................................19
6.1 目测 .............................................................19
6.2 硬件调试 .........................................................19
6.3 软件的调试.......................................................19
6.4 注意事项.........................................................20
结束语 ..................................................................22
参考文献 ................................................................23
致 谢 ...................................................................24
附录一 程序 .............................................................25
附录二 硬件电路图 ......................................................36
