基于STC89C52单片机的测温控制系统_毕业论文设计

基于51单片机的温度控制系统

专 业： 测控技术与仪器

基于51单片机的温度控制系统

摘 要:

温度控制系统在工业，农业上应用广泛，在当代社会，对于温度控制方面要求越来越高，越来越精细。因此我们在本次学校实习中选择完成一个基本的温度测量并控制温度在一定范围内的课题，因此来锻炼自己的能力。

本次设计采用单片机对温度进行测量和控制，并控制其温度稳定在某一个设定值上。通过数码管显示温度，并具有报警系统，可以通过键盘输入来控制基准温度与上下限温度。基本达到自动控制的目的。

基于STC89C52单片机的温控系统主要实现了温度采集、A/D转换、温度控制及报警等功能。

首先，介绍了我们选择的课题要求，同时重点介绍了我们选择的芯片资料，如STC89C52，ADC0809。

其次，阐述了系统的工作原理，完成了系统结构图的设计，把系统划分为5大模块并完成了各大模块的设计工作，同时附以系统硬件电路原理图。

最后，设计了系统的软件。系统软件是用C语言进行软件设计的，C语言具有指令简单，数据量小等特点。

关键词：温度控制；STC89C52；C语言

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基于51单片机的温度控制系统

Abstract:

The temperature control system in industry, agriculture on a wide range of applications, in the contemporary society, the temperature control requirements more and more high, more and more fine. Therefore, we in the school practice choose to complete a basic temperature measurement and project control temperature in a certain range, thus to exercise their abilities.

This design uses the monolithic integrated circuit for measuring and controlling temperature, and to control its temperature stability in a certain set of values. Through digital tube display temperature, and has alarm system, through the keyboard input to control the reference temperature and minimum temperature. Basically achieve the purpose of automatic control.

The temperature control system of STC89C52 single chip microcomputer is mainly realized the temperature acquisition, A/D conversion, temperature control and alarm functions based on.

Secondly, it describes the principle of the system, designed the system structure diagram, the system is divided into 5 major parts and finished the designing of each module, and attached to the system hardware circuit diagram.

Finally, the design of the system software. The system software is written in C language for software design, C language has the characteristics of simple instruction, small amount of data.

Key Words: temperature control；STC89C52 ；C language

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基于51单片机的温度控制系统

目录

1课题要求 ............................................... 5 2总体设计方案 ....................................... 6

2.1系统总体设计 ............................................................... 6 2.2单片机选择 ................................................................... 6 2.3显示电路选择 ............................................................... 7 2.4键盘电路选择 ............................................................... 8 2.5 AD电路选择 ................................................................. 8 2.6温度采集电路选择 ........................................................ 9 2.7控制电路选择 ............................................................. 11

3 系统硬件设计 .................................... 12

3.1系统硬件功能分析 ...................................................... 12 3.2单片机最小系统设计 .................................................. 12 3.4温度检测电路设计 ...................................................... 14 3.4 AD转换模块设计 ........................................................ 15 3.5温度控制系统设计 ...................................................... 17 3.6报警模块设计 ............................................................. 18 3.7键盘输入模块设计 ...................................................... 19

4 系统软件设计 .................................... 20

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