目 录
摘 要.............................................................................................................................1
目 录.............................................................................................................................2
第一章 绪论................................................................................................................1
1.1 选题的背景.....................................................................................................1
1.2 选题的目的及意义.........................................................................................1
1.3 论文结构.........................................................................................................2
第二章 设计的整体方案.............................................................................................3
2.1 设计的主要容.................................................................................................3
2.2 设计性能要求.................................................................................................3
第三章 模块设计和器件的选择.................................................................................4
3.1 单片机的选择.................................................................................................4
3.1.1 AT89C51的基本组成............................................................................4
3.1.2 AT9C51的引脚及其功能......................................................................6
3.1.3 AT89C51的工作模式............................................................................7
3.2 温度采集模块设计.........................................................................................8
3.2.1 方案论证...............................................................................................8
3.2.2 DS18B20的性能特点...........................................................................9
3.2.3 DS18B20的部结构...............................................................................9
3.2.4 DS18B20的测温原理.........................................................................12
3.2.5 DS18B20的各条命令.........................................................................13
3.2.6 温度数据的计算处理方法.................................................................14
3.3 温度显示模块设计.......................................................................................15
3.3.1液晶显示简介......................................................................................15
3.3.2 LM016L的结构及功能.......................................................................16
3.4直流电机驱动模块........................................................................................19
3.4.1方案选择..............................................................................................19
3.4.2 L298驱动芯片.....................................................................................19
第四章 系统电路设计...............................................................................................21
4.1 主电路程序...................................................................................................21
4.2 晶振复位电路...............................................................................................21
4.3 温度采集电路...............................................................................................24
4.4 按键电路.......................................................................................................26
4.5驱动电路........................................................................................................26
4.6 报警电路.......................................................................................................28
4.6.1 低温报警.............................................................................................28
4.6.2 高温报警.............................................................................................28
4.7 电源电路.......................................................................................................29
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