基于单片机的数字温度计设计.docx

说明1.此论文题目为《基于单片机的数字温度计设计》；2.以AT89S51芯片为核心，DS18B20为感温元件设计而成；3.功能：四位数码管显示温度、智能报警、可设置报警温度范围；4.此论文为本人参考多方面资料整理完善而成，其中或许有许多不足，需要亲自己参考其他资料加以确认；5.仅供参考，严禁抄袭；6.如出现抄袭而被查重，一切责任与本人无关！2013年6月15日基于单片机的数字温度计设计摘要随着时代的进步和发展，人们对生活环境要求的不断提高，人们在生活的许多方面都有着对温度进行感知和控制的需要。传统温度计由于精度等各种原因，已经不能满足我们的需要。然而单片机技术发展迅速，已经普及到我们生活、工作、科研、各个领域，已经成为一种比较较成熟的技术。本文描述的是一种基于AT89S51单片机的数字温度计及报警系统,该系统采用DS18B20作为温度采集、监测元件，将采集到的信号送到单片机进行处理，判断是否报警，再将数据送到数码管显示出来，该设计可以设置温度计的报警上下限。文中介绍了集成温度传感器DS18B20的原理，AT89S51单片机的功能和应用，着重给出了软硬件系统的各部分电路。该系统具有功能强大、结构简单和体积小等优点。关键词：单片机、温度计、AT89S51、DS18B20The design of Microcontroller-based digital thermometerAbstract:With the era of progress and development, peoples living environment requires continuous improvement in many aspects of life that people have a right temperature sensing and control needs. Traditional thermometer to various reasons such as accuracy, can not meet our needs. However, the rapid development of chip technology, has spread to the way we live, work and research in various fields, has become a relatively mature technology. This paper describes a AT89S51 microcontroller-based digital thermometer and alarm system, the system uses as the DS18B20 temperature acquisition, monitoring components, the collected signal to the microcontroller for processing, to determine whether the alarm, then the data sent to the digital display out that the design can set the thermometer alarm limit. This paper introduces the principle of integrated temperature sensor DS18B20, AT89S51 microcontroller features and applications, with emphasis given to each part of the circuit hardware and software systems. The system has a powerful, simple structure and small size, etc.Keywords: microcontroller, thermometer, AT89S51, DS18B20目录第1章前言31.1 研究意义及背景31.2 研究目的31.3 主要研究工作3第2章系统概述32.1 系统方案32.2 系统组成32.3 系统性能指标3第3章系统硬件设计33.1 AT89S51单片机的介绍33.1.1 单片机的选择33.1.2 AT89S51单片机的功能结构33.2 数码管显示电路33.2.1 4位共阳数码管33.2.2 显示电路33.3 DS18B20温度传感器33.3.1 DS18B20简介33.3.2 DS18B20的结构及工作原理33.3.3 测温电路33.3.4 提高DS