基于单片机的智能温度控制系统

摘要

温度是生产生活中常见的指标，同时也是生产生活中重要的影响因素，直接关系着生产效率，生产安全，生活质量。因此我们常常通过来控制温度来达到各种目的。让温度在期望值范围波动，对于不同的超温或者差温做出适合的动作。智能控制系统是某些具有仿人智能的工程控制和信息处理系统。智能可定义为:能有效的获取、传递、处理、再生和利用信息，从而在任意给定的环境下成功的达到目的。智能温度控制系统就是在无人的情况下根据设定情况对外界温度信息做出及时的合理的决策并且显示当前温度与设定温度。

本设计介绍了以高性能cmos8位机AT89S51单片机为核心的温度控制系统。温度信号由温度传感器DS18B20采集，并反馈给单片机，然后通过单片机发出信号控制之流电机转向转速。文中介绍了该控制系统的硬件部分包括：温度检测电路、PWM控制电路、LCD显示电路和一些接口电路。单片机通过对信号进行相应处理，从而实现温度控制的目的。文中还着重介绍了软件设计部分，在这里采用模块化结构，主要模块有：LCD显示程序、键盘扫描及按键处理程序、驱动控制电机程序。

关键词：AT89C51 温度传感器智能控制直流电机

Abstract

The temperature is a common index in production and living, meanwhile it also has a important influence on production and living, directly impacts the production efficiency, production safety and quality of life. To achieve different aims, we often do it by controlling the temperature to achieve. Let the temperature fluctuate around expectations, appropriate action will be taken when it is beyond or below the set value. Intelligent control system is a certain engineering of human-simulated intelligent control and information processing systems. Intelligence can be defined as: effective acquisition, transmission, processing, regeneration, and the use of information, so as to succeed in any given environment achieving goals. Intelligent temperature control system will make timely and reasonable decision and display the current temperature and setting temperature according to the outside and set temperature, in the absence of person

This design introduces a kind of temperature control system based on high performance cmos8 SCM AT89S51. Temperature signal will be acquisited by temperature sensor DS18B20, and feedback to the SCM, then the SCM will send a signal to control the motor speed and direction. This paper introduces the hardware part of the control system,including: temperature detection circuit, PWM control circuit, LCD display circuit and etc.SCM the is going to achieve the purpose of temperature control through processing signal. The paper also introduces the software design part, here using the modular structure, main modules include: LCD display program, keyboard scanning and processing program, drive motor control.

Key words：AT89C51 Temperatue sensor Intelligent control DC-motor

目录

摘要 .................................................................................................................................. I Abstract .............................................................................................................................. II 目录 ................................................................................................................................ I II 第1章绪论 (1)

1.1 系统背景 (1)

1.2 系统来源及现状 (1)

1.2.1 系统来源 (1)

1.2.2 温度控制的国内外现状 (2)

1.3 温度控制技术发展的趋势 (3)

1.4 本章小结 (4)

第2章系统方案设计论证 (5)

2.1 系统设计的主要要求及技术指标 (5)

2.2 系统的总体方案设计和工作原理简述 (5)

2.2.1 系统总体方案设计 (5)

2.2.2 系统工作原理简述 (6)

第3章系统硬件设计 (7)

3.1系统模块电路组成 (7)

3.2温度采集电路设计 (7)

3.2.1温度传感器方案论证 (7)

3.2.2 DS18B20的内部机构 (8)

3.2. 3 DS18B20的电路连接 (11)

3.3 设定按键电路设计 (12)

3.3.1 设定按键原理及技术特点 (12)

3.3.3设定按键的电路连接 (13)

3.4单片机选型 (14)

3.5单片机最小系统设计 (16)

3.5.1 时钟电路 (17)

3.5.2 复位电路 (17)

3.6控制电路设计 (19)

3.6.1 直流驱动器选型 (19)

3.6.2 直流电动机调节方案论证 (21)

3.7 温度显示电路 (22)

3.7.1液晶显示器 (22)

3.7.2液晶显示电路的连接 (23)

3.8电源电路设计 (24)