文档介绍：单片机控制自动恒温箱的设计
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摘要恒温控制在工业生产过程中举足轻重,温度的控制直接影响着工业生产的产量和质量。本设计是基于AT89C51单片机的恒温箱控制系统,系统分为硬件和软件两部分,其中硬件包括:温度传感器、显示、控制和报警的设计;软件包括:键盘管理程序设计、显示程序设计、控制程序设计和温度报警程序设计。编写程序结合硬件进行调试,能够实现设置和调节初始温度值,进行数码管显示,当加热到设定值后立刻报警。另外,本系统通过软件实现对按键误差、加热过冲的调整,以提高系统的安全性、可靠性和稳定性。本设计从实际应用出发选取了体积小、精度相对高的数字式温度传感元件DS18B20作为温度采集器,单片机AT89C51作为主控芯片,数码管作为显示输出,实现了对温度的实时测量与恒定控制。
关键词: 单片机;恒温;控制;报警
Designing of Automatic Constant Temperature Box Controlled By SCM
Student: Jingming Huang
Tutor:Peizhong Cai
(College of Dong Fang technology, Hunan Agricultural University, Changsha 410128, China)
Abstract: The system makes use of the single chip AT89C51 as the temperature controlling center, uses numeral thermometer DS18B20 which transmits as 1-wire way as the temperature sensor, through the pressed key, the numerical code posite of the man-machine interactive connection ,to realize set and adjust the initial temperature value. After the system works, the digital tube will demonstrate the temperature value, when temperature arriving to the setting value, the buzzer will be work immediately. In addition, the system through the software adjusting to the pressed key error, and the excessively hutting.
Keywords: SCM; Constant temperature;control;waring.
目录
摘要…………………………………………………………………………………1
关键词…………………………………………………………………………………1
1 前言…………………………………………………………………………………1
2 系统概述……………………………………………………………………………1
简述……………………………………………………………………………1
3 设计思路分析………………………………………………………………………2
4 方案论证……………………………………………………………………………2
温度传感器……………………………………………………………………2
显示部分………………………………………………………………………2
输出控制………………………………………………………………………3
5 硬件设计及工作原理………………………………………………………………3
系统功能及工作流程介绍……………………………………………………3
功能模块………………………………………………………………………5
系统硬件设计…………………………………………………………………5
DS18B20测温电路…………………………………………………………5
DS18B20的特点介绍………………………………………………………6
单线(1-wire)技术………………………………………………………6
DS18B20的引脚及功能介绍………………………………………………7
输出控制电路…………………………………………………………