【毕业设计.论文】基于单片机的温度控制系统设计与实现.docVIP

摘 要 近年来随着计算机在社会领域的渗透, 单片机的应用正在不断地走向深入，同时带动传统控制检测日新月益更新。在实时检测和自动控制的单片机应用系统中，单片机往往是作为一个核心部件来使用，仅单片机方面知识是不够的，还应根据具体硬件结构，以及具体应用对象特点的软件结合，以作完善。 本文从硬件和软件两方面来讲述自动控制过程,在控制过程中主要应用AT89C51、ADC0809、LED显示器、LM324比较器，而主要是通过 DS18B20数字温度传感器采集环境温度，以单片机为核心控制部件，并通过四位数码管显示实时温度的一种数字温度计。 系统的过程则是：首先,通过设置按键,设定恒温运行时的温度值，并且用数码管显示这个温度值.然后,在运行过程中将采样的温度模拟量送入A/D转换器中进行模拟-数字转换，再将转换后的数字量用数码管进行显示 关键词：单片机系统；传感器；数据采集；模数转换器；温度  Abstract In recent years, with the computer penetration in the social field, the application of SCM is to keep at the same time, traditional control testing update on Crescent benefits. In real-time detection and automatic control system of single-chip applications, often as a single-chip core component to use only single-chip is not enough knowledge, but also the specific hardware structure and the specific features of application software objects combine to make perfect. In this paper, both hardware and software for automatic control of water temperature on the process, in the control of the main application of the process of AT89C51, ADC0809, LED display, LM324 comparator, but mainly through the digital temperature sensor DS18B20 collecting ambient temperature to single-chip microcomputer as the core control components, and through four real-time digital display of a digital thermometer temperature. Systematic process is: First of all, by setting the button, set the thermostat temperature at the time of operation, and digital display of the temperature. Then, in the running temperature of the process of sampling analog into the A / D converter in the simulation - digital converter, and then converted digital control with digital display. Key words：Single-chip microcomputer system ；Sensor；Data Acquisition；ADC；Temperature 第1章 绪 论 1 1.1课题的背景及其意义 1 1.2课题研究的内容及要求 2 1.3课题的研究方案 2 第2章 设计理论基础 4 2.1单片机的发展概况 4 2.2 AT89C51系列单片机介绍 5 2.2.1 AT89C51系列基本组成及特性 5 2.2.2 AT89C51系列引脚功能 6 2.2.3 AT89C51系列单片机的功能单元 9 2.3 ADC0809模数转换器 11 2.4移位寄存器74LS164 13 2.5数码显示管LED 13 2.6数字温度计DS18S20 14 第3