文档编号:JD021    字数:15844,页数:46

目录
目录 .................................................................1
第一章   绪论.........................................................1
1. 1   选题背景 ......................................................1
1．2 设计过程及工艺要求...............................................2
第二章    方案的比较和论证............................................2
2. 1温度传感器的选择 .................................................3
2. 2 湿度传感器的选择.................................................3
2. 3 信号采集通道的选择 ..............................................4
第三章    系统总体设计................................................5
3．1  信号采集........................................................6
3．1．1  温度传感器...................................................6
3. 1. 2 湿度传感器....................................................9
3．1．3 多路开关 ....................................................12
3．2  信号分析与处理 ................................................13
3．2．1  A/D转换 ....................................................13
3. 2. 2单片机8031 ...................................................16
3. 2. 2. 1 8031的片内结构 ...........................................17
3. 2. 2. 2 8031的引脚图..............................................18
3. 2. 2. 3 8031程序存储器............................................19
3. 2. 2. 4 8031数据存储器............................................20
3. 2. 2. 5 特殊功能寄存器SFR ........................................21
3. 2. 2. 6 工作方式 .................................................22
3. 2. 3存储器的设计 .................................................23
3. 2. 4数据存储器的掉电保护..........................................24
3. 2. 5系统时钟的设计 ...............................................25
3. 3 显示与报警的设计................................................25
3. 3. 1 显示电路 ....................................................25
3. 3. 2 报警电路 ....................................................26
第四章   软件设计....................................................27
参考文献 ............................................................33
附录A 程序清单...................................................... 34