基于单片机控制的数字温度计[毕业论文].doc

基于单片机控制的数字温度计[毕业论文]

摘 要
温度作为一个常用的物理量在我们的气场生活中起着十分重要的作用，所以对温度计的设计也十分必要。在此设计一种智能数字温度计，这种温度计有许多优点，并且它的应用范围非常广泛。它通过利用控制器—AT89C52、温度传感器—DS18B20、数码管—LED设计一个可以很好的转换温度值，并且直接显示温度值的数字温度计。与传统的数字温度计相比，具有读数方便，测温范围广，测温准确，其输出温度采用数字显示的优点。
【关键词】    智能    数字   温度计   AT89C52

Abstract
The temperature took a commonly used physical quantity is playing the extremely vital role in ours gas field life, therefore extremely is also essential to the thermometer design. In this introduced one kind of intelligent numeral thermometer, this kind of thermometer has many merits, and its application scope is extremely widespread. Its key element is: Controller - AT89C52, temperature sensor - DS18B20, nixie tube - LED ,not only therefore this kind of thermometer designs simple and is facile, is cheap, generally speaking this kind of thermometer performance-to-price ratio is very high. Its main principle is uses DS18B20 to be possible the very good transformation temperature value, and demonstrates the temperature value directly, and its performance surpassed traditional the bulb to omit, and the analog switch design. And in addition  AT89C52 volume small also may direct drive LED, and simplified the design difficulty to reduce the cost like this greatly.

 [Key word]  Intelligence   Numeral   Thermometer    AT89C52


目 录
摘 要 I
Abstract I
目 录 II
第一章 绪论 1
1.1数字温度计的发展现状 1
1.2数字温度计的目的和意义 1
第二章 总体方案 2
2.1数字温度计设计方案论证 2
2.2芯片的选择 3
2.2.1单片机的选择 3
2.2.2 温度传感器的选择 3
2.2.3显示器的选择 3
第三章 DS18B20数字温度计 5
3.1硬件模块 5
3.1.1硬件原理图 5
3.1.2主控制器 5
3.1.3复位电路 7
3.1.4晶振电路 7
3.1.5报警电路 8
3.1.6 显示电路 8
3.1.7键盘电路 9
3.1.8温度传感器 10
3.1.9LED显示器 12
3.2 软件模块 13
3.2.1主程序 13
3.2.2温度转换命令子程序 15
3.2.3读出温度子程序 15
3.2.4计算温度子程序 16
3.2.5显示数据刷新子程序 16
第四章 结论 18
4.1 Proteus图 18
4.2数字温度计的仿真 18
4.3总结 20
致 谢 21
参考文献 22
附录1： 23
源程序 23
附录2 37
电路原理图 37