毕业设计（论文）-基于单片机的数字温度计的设计.doc

2012届本科生毕业论文
题目: 基于单片机的数字温度计的设计
作者姓名:
学号:
系(院):机械与电子工程学院
专业:电机工程及其自动化
指导教师姓名:
指导教师职称: 讲师
2011年 12月 18日
SuZhou University
Year 2012 Bachelor Graduation assignment(Design)
Title: Chip digital thermometer design
Author: Daijia
Student ID: 2008080408
Department: College of mechanical and Electionic Engineering
Major: Electrical engineering and actomation
Instructor: Huxueqing
Professional Title: lecture
December 18th, 2011
摘要
随着时代的进步和发展,单片机技术已经普及到我们的生活、工作、科研、各个领域,已经成为一种比较成熟的技术。本文介绍一种基于AT89C51单片机的一种温度测量,该电路采用DS18B20作为温度监测元件,测量范围-30℃-~150℃。正文着重给出了软硬件系统的各部分电路,介绍了集成温度传感器DS18B20的原理,AT89C51单片机功能和应用。该系统可以方便的实现温度采集和显示,并可根据需要设定上下限温度,它使用起来具有精确度高、测量广、灵敏度高、体积小、功耗低等优点。该电路设计新颖、功能强大、结构简单,有广泛的应用前景。
关键词:温度测量; DS18B20 ; AT89C51
ABSTRACT
Along with the progress and development of the ages,single slice the machine technigue has already make widely availablc the life is to us,work,research,each reach,have alrealy e the technique of a kind parison introduction of a cost-based AT89C51 MCU a temperatur measurement circuits, the circuits used DS18B20 high-precision temperatur sensor , measuring scope -30℃~+150℃。The paper focuses on providing a software and hardware ponents circuit, introduced the theory of DS18B20, the founctions and applications of AT89C51 .System can easily to collect and display the temperature,it can also arbitrary set alarm temperature according to the accrual is used convenience ,it has high precision ,wide range,high sensitivity,small size,and low power disspition,This circuit design innovative, powerful, can be expansionary strong,turu into as plementary expansion.
Key Words : Temperatur measurement ; DS18B20 ; AT89C51
目录
引言 1
1 器件简介 2
AT80C51 简介 2
AT89C51简介 2
管脚说明 2
DS18B20 简介 4
DS18B20简介 4
DS18B20的性能特点 4
DS18B20的内部结构 4
DS18B20 的测温 5
LCD 液晶显示 6
2 系统设计 7
7
总体设计框图 7
3 系统硬件软件设计方案 8
8
8
复位信号及外部复位电路 9