电子系论文单片机温度报警器

AT89C2051 论文

毕 业 (设 计) 论 文

题目： AT89C2051单片机温度报警器

系部： 电子信息工程系 专业： 应用电子技术 班级： 应电A0803 姓名： XX 指导教师： XX

XX 职 业 技 术 学 院

AT89C2051 论文

目 录

摘 要 .......................................................................................................... 2 关键词： .......................................................................................................... 2 Abstract ............................................................................................................ 3 Keywords: ........................................................................................................ 3 一、功能说明 ................................................................................................... 5 二、电路操作说明 ............................................................................................ 5 三、电路原理图 ................................................................................................ 6 四、元件清单 ................................................................................................... 7 五、单元电路设计 ............................................................................................ 8

（一）电源部分 ......................................................................................... 8 （二）前级信号处理部分 .......................................................................... 8 （三）主控部分 ......................................................................................... 8 （四）位驱动、段驱动及数码管显示部分 ............................................... 10 （五）键盘输入部分 ............................................................................... 11 （六）高温报警部分 ............................................................................... 11 致谢 ................................................................................................................ 13 参考文献 ........................................................................................................ 14

AT89C2051 论文

摘 要

温度是一个十分重要的物理量，对他的测量与控制有十分重要的意义，随着现代工农业技术的发展及人们对生活环境要求的提高，人们也迫切需要检测与控制温度。本温度报警器的设计与制作，阐明了该装置进行设计与制作的具体过程及方法。这种温度报警器结构简单，可操作性强，应用广泛。工作时，温度测量范围为-55ºC到125 ºC当前环境温度若超过设定的高温临界温度，由单片机发出报警信号，防止因温度升高而带来的不必要的损失。

现代社会是信息社会，随着安全化程度的日益提高，机房——作为现代化的枢纽，其安全工作已成为重中之重，机房内一旦发生故障，将导致整个系统瘫痪，造成巨大的损失很社会影响。

造成高温火灾有：电气线路短路、过载、接触电阻过大等引发高温或火灾；静电产生高温或火灾；雷电等强电侵入导致高温或火灾；最主要是机房内电脑、空调等用电设备长时间工作，导致设备老化，空调发生故障，而不能降温；因此机房内所属的电子产品发热快，在短时间内机房温度升高超出设备正常温度，导致系统瘫痪或产生火灾，这时温度报警系统就会发挥应有的功能。

本文介绍的是采用温度传感器DS18B20的温度报警器，自动测量当前环境温度，由单片机AT89C2051控制，并通过三位7段数码管显示，若当前环境温度超过此温度，系统发出报警。

关键词：

单片机 温度报警器 温度传感器 发光二极管 温度显示

AT89C2051 论文

Abstract

Temperature is a very important physics, measurement and control of his have very important sense, with modern industrial and agricultural technology and the development of environment for people's life rise, people also urgently need detection and control the temperature. This temperature alarm design and production, it is expounded that the device for the design and production of specific processes and methods. This temperature alarm simple structure, the maneuverability is strong, wide application. Work, temperature

measurement range for - 55 DHS C to 125 DHS environmental temperature if exceed the C the current set of microcomputer temperature critical temperature, issued a warning signal, caused by temperature to prevent unnecessary losses.

The modern society is the information society, as secure degree of increasing, room - as modern hub, its work safety has become a top priority, the telecom room once breaks down, will cause the entire system paralyze, caused great damage very social influence.

A: high temperature fire caused by electrical wiring short circuit, overload, contact resistance too high temperature or triggered fires; Electrostatic generation high temperature or fire; Lightning invasion as lead to high temperatures or fire &high; Most major is the telecom room computers, air-conditioners etc electrical equipment working for a long time, resulting in equipment aging, air conditioning, and cannot cooling fault; Therefore the telecom room belongs to electronic products fever faster, in a short time, room temperature beyond normal temperature, cause the system equipment or produce fire, then paralyzed temperature alarm system will play its function.

This paper is to use temperature sensor DS18B20 temperature alarm, automatic measuring current environmental temperature by a single chip microcomputer AT89C2051 control, and through three seven segment digital pipe display, if the current environmental temperature over this temperature, system warning.

Keywords:

AT89C2051 论文

Microcontroller Temperature alarm Temperature sensor leds Temperature display

AT89C2051 论文

一、功能说明

该温度报警器电路是由18B20温度传感器作为温度传感器材，由AT89C2051 单片机进行数据处理，由0.56寸的三位共阳数码管显示温度值。可由电脑USB接口供电，也可外接6V～16V的直流电源。温度显示（和控制）的范围为：-55ºC到125 ºC之间，精度为1ºC，也就是显示整数。如果设定报警的温度为20ºC， …… 此处隐藏：4785字，全部文档内容请下载后查看。喜欢就下载吧 ……