文档介绍：摘要
温度是一个十分重要的物理量,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,对温度的测量与控制有着十分重要的意义。本系统以AT89S52单片机为核心,设计了一个温度测量报警系统,温度的采集报警功能。系统的硬件部分可以分为主控电路(单片机最小系统)、数据采集、人机交互界面和系统电源四大部分。最小系统部分主要包括AT89S52单片机和扩展的外部存储芯片24C02;数据采集部分由温度传感器18B20组成;人机交互界面为键盘输入和LCD液晶显示,主要使用4×4矩阵键盘和LCD1602液晶显示器,可以方便的输入数据和直观的显示。系统电源为+5V电源供电。软件部分应用单片机C语言进行编程,实现了该设计的全部控制功能。该温度测量报警系统的测量范围是-55℃~+125℃。当检测的温度高于最高温度设定值时,蜂鸣器报警,当检测的温度低于最低温度设定值时,蜂鸣器报警。起到温度测量报警的作用。
关键词:单片机温度传感器(DS18B20) 液晶显示器
ABSTRACT
Temperature is a very important physics, with the development of modern agriculture technology development and the people to the life environment, temperature measurement and control is very important,in this system AT89S52 SCM as the core, designed a temperature measurement alarm system, the collection of temperature alarm function. System ponents can be divided into the main control circuit (SCM smallest system), data acquisition, man-machine interface and power system and the four most. Smallest system parts mainly includes AT89S52 SCM and the expansion of external memory chip 24C02; Data collection 18B20 part temperature posed; The man-machine interface for keyboard input and LCD display, mainly use 4 x 4 matrix keyboard and LCD1602 LCD monitor, easy to input data and intuitive display. Power system is + 5V power supply. Software application of single-chip puter C programming language, realize the design of all control function. The temperature measuring alarm system measurement range is - 55 ℃~ + 125 ℃. When testing temperature higher than the maximum temperature setting, the buzzer alarm, when testing temperature below the minimum temperature setting, buzzer alarm. Play the role of temperature measurement alarm.
Key words:Monolithic integrated circuit AT89S51 temperature sensor (DS18B20) LCD Manifestation
目录
1 绪论 1
引言 1
选题的背景和意义 1
研究现状 2
本文的工作 2
2 数字摄温度测量报警系统方案的设计 4
数字式温度测量报警系统的设计要求 4
系统总体设计方案比较与论证 4
温度测量报警系统的硬件选择 6
具体实施方案 8
3 系统硬件的设计 10
基于AT89S52的主控电路 10
芯片介绍 10
主控电路