基于AT89C52的数字温度计设计与仿真.doc

基于AT89C52的数字温度计设计与仿真 绪论 PAGE 1 基于AT89C52的数字温度计设计与仿真 谭亚平 （吉首大学物理科学与信息工程学院，湖南 吉首 416000） 摘 要 温度采集显示及报警系统是一个应用于需要对温度进行精准控制报警的系统，实现了对温度进行精准采集显示和越限声光报警的功能。以方便系统使用者能够更好的了解当前温度安全状况，使相应地区场所的安全得到保证。 本系统以AT89C52单片机为微控制器，采用数字温度传感器DS18B20作为测温元件,温度传感器DS18B20采集温度信号送给单片机处理，单片机再把处理后的温度数据送到LED上显示出来。能够实现快速、准确的测温功能和越限声光报警功能。本论文完成了系统硬件电路的设计，给出了软件流程框图，编写了相关的软件程序，并记录了仿真与实现的过程。 关键词：温度报警；单片机（AT89C52）；数字温度传感器（DS18B20）；Keil C51 Digital Thermometer Design and Simulation Based on AT89C52 TanYaPing (College of Physics Science and Information Engineering,Jishou University,Jishou,H Abstract The temperature acquisition display and alarm system is used a need for precise temperature control of the alarm system to achieve accurate temperature acquisition of the more limited display and sound and light alarm function. With convenient system users to better understand the current temperature security situation,it make corresponding regional sites safety guaranteed. The system uses AT89C52-SCM as Microprogrammed Control Unit and adopts digital temperature sensor DS18B20 as the temperature component. The temperature sensor DS18B20 collects temperature signals and sends them to SCM for dealing with, then SCM transfers the processed temperature data to LED for dispalying which can realize the fast and accurate temperature measurement function and the more limited sound and light alarm function. This thesis has completed the design of the system hardware, procided the software flow diagram,compiled the related software program,and recorded the simulation and realization process. Keywords：Temperature Alarm; Single-Chip microcomputer（AT89C52）;digital temperature sensors applications DS18B20; Keil C51. 目录 TOC \o 1-3 \h \z \u 第一章 绪 论 1 1.1 研究背景 1 1.2 本课题的研究内容 1 第二章 系统硬件设计 2 2.1 总体设计 2 2.2 AT89C52简介 2 2.2.1 主要性能 2 2.2.2 引脚介绍 3 2.3 DS18B20 介绍 4 2.3.1 DS18B20性能特点 5 2.3.2 DS18B20内部结构及功能 5 2.3.3 DS18B20的通信协议 7 2.4