摘 要：随着科学技术和生产的不断发展，需要对各种参数进行温度测量，由于温度测量的普遍性，温度传感器的数量在各种传感器中居首位。温度控制的发展引入单片机后，可以降低对某些硬件电路的要求。基于单片机的温度控制系统，可以实现对温度的精确控制。94273

本设计以STC89C51单片机为核心的温度控制系统的工作原理和设计方法，温度信号由温度芯片DS18B20采集，并以数字信号的方式传给单片机，单片机通过对信号进行相应处理，从而实现对温度的精确控制的目的。由于单片机具有处理能力强，运行速度快，功耗低等优点，故基于单片机的温度控制系统具有控制简单，测量范围广，精度高，得到广泛应用。

基于单片机的温度控制系统，实现对温度的精确控制，使得某些场合下人人们对温度的高低要求得以实现。对人们的生产生活影响巨大，比如在我国的北方，冬天温度极低，但引入温室大棚后，冬天的时候人们也能吃到新鲜的蔬菜；钢铁厂里炼铁，对温度的要求更高，这就使得对温度控制变的极为有意义，而在我们的日常生活中，空调让我们东暖夏凉，确实让我们感受到温度控制对我们生活质量的提高起着很大的作用，总之，现代工业设计，工程建设及日常生活中温度控制都起着重大作用。

毕业论文关键词：温度控制，单片机，DS18B20，数据采集

Abstract：。With the continuous development of science and technology and production, the need for various parameters of temperature measurement, due to the universality of temperature measurement, the number of temperature sensors in various kinds of sensors in the first place。 After the introduction of the development of single chip microcomputer temperature control, can reduce the requirement for certain hardware circuit。 Based on single chip microcomputer temperature control system, can realize accurate control of temperature。

STC89C51 single chip microcomputer as the core of the design principle and design method of temperature control system, by temperature chip DS18B20 temperature signal acquisition, and in the form of digital signal to the based on signal processing accordingly, so as to realize the purpose of precise control of temperature。 Because the single chip microcomputer has strong processing capacity, running speed, low power consumption, so the temperature control system based on single chip microcomputer control with simple, wide measuring range, high precision and widely used。

Based on single chip microcomputer temperature control system, realize the precise control of temperature; good people make some occasions to temperature requirement。 Had a huge impact on people's production and life, in the north of our country, for example, low temperature in winter, but after the introduction of greenhouses, the people in the winter also can eat fresh vegetables; Iron steel factory, the requirement for temperature is higher, this makes the control of temperature change is very meaningful, and in our daily life, air conditioning make us east warm summer cool, really let us feel the temperature control to improve the quality of our lives plays a big role, in a word, the modern industrial design, engineering construction and temperature control plays a significant role in daily life。

Keywords: Single chip microcomputer, Temperature control, DS18B20, The data collection

目  录

第1章 绪论 6

1。1 课题简介 6

1。2 国内外现状及水平 6

第2章 工作原理及方案论证 8

2。1 工作原理 8