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1、题 目: 单片机温度测试系统 班 级： 0 6 2 1 4 学 号： 0 4 姓 名： 樱 凝 指导老师： 辛 追 北京大学二九 年 六 月 五 日MCS-51单片机实现数字温度计中文摘要:近年来随着科技的飞速发展，单片机的应用正在不断深入，同时带动传统控制检测技术日益更新。在实时检测和自动控制的单片机应用系统中，单片机往往作为一个核心部件来使用，仅单片机方面知识是不够的，还本文从硬件和软件两方面介绍了MCS-51单片机温度控制系统的设计思路，对硬件原理图和程序框图作了简捷的描述。应根据具体硬随着人们生活水平的不断提高,单片机控制无疑是人们追求的目标之一，它所给人带来的方便也是不可否定的，其中
2、数字温度计就是一个典型的例子，但人们对它的要求越来越高，要为现代人工作、科研、生活、提供更好的更方便的设施就需要从数单片机技术入手，一切向着数字化控制，智能化控制方向发展。 目前,典型的温度测试系统是由模拟式温度传感器、A/D转换电路和单片机组成,由于模拟式温度传感器输出为模拟信号,必须经过A/D转换环节获得数字信号后才能与单片机等相接，本次设计的目的在于学习与了解嵌入式系统开发的基本流程，了解单片机与传感器AD590的通信、LED液晶显示屏驱动电路的设计、单片机与PC机的通信。论文主要介绍了一个基于51单片机的温度信号采集显示系统的设计，主要叙述了单片机温度采集控制系统的硬件电路设计和软件的
3、编写、调试过程。本系统主要包括：温度采集与A/D转化、数据处理、数据显示、信号放大电路、报警电路五大部分。系统实现的功能是温度检测、数值显示。温度传感器AD590对环境温度进行检测，并且经A/D转化器ADC0809转化成数字温度信号，通过单总线传递给单片机，单片机作为数据处理与控制单元，为了进行数据处理，单片机控制数字温度传感器，把温度信号通过单总线从数字温度传感器传递到单片机上。单片机数据处理之后，发出控制信息改变报警和控制执行模块的状态，同时将当前温度信息发送到LED进行显示，发出控制信号达到控制蜂鸣器和发光二级管的目的。即可实现温度信号采集转化，显示与报警功能！该系统设计和布线简单、体积
4、小、重量轻、性价比高、扩展方便。采用适当的技术将模拟的温度量转化为数字量在原理上虽然不困难但成本较高,还会遇到其它方面的问题。因此对单片机温度控制系统的研究有重要目的和意义.本设计所介绍的数字温度计与传统的温度计相比，具有读数方便，测温范围广，测温准确，其输出温度采用数字显示，主要用于对测温比较准确的场所，或科研实验室使用。关键词：单片机 温度采样 驱动电路 AT89C51 显示英文摘要:In recent years, with the rapid development of science and technology, the application of SCM is at the
5、same time, traditional detection techniques to control the growing update. 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 this article from both hardware and software int
6、roduced the MCS-51 single-chip Temperature control system design, schematic diagram of the hardware and procedures were simplified block diagram description. Should be based on the specific hardware along with the continuous improvement of peoples living standard, single-chip control is undoubtedly
7、one of the objectives pursued, it gives people the convenience can not be negative, in which digital thermometer is a typical example, but people its increasingly high demand for people to work, scientific research, life and more convenient to provide better facilities will need to start from the nu
8、mber of single-chip technology, all toward the digital control, intelligent control of direction. At present, the temperature of a typical test system is provided by the analog temperature sensor, A / D conversion circuit and single-chip component, as the analog output temperature sensor to analog s
9、ignals to go through A / D conversion link can receive digital signals with a single phase, etc., the design is aimed at learning and understanding of the basic embedded system development processes, understand the single-chip communication with the AD590 sensor, LED LCD drive circuit design, MCU an
10、d PC-communication. Paper introduces a single-chip based on 51 shows that the temperature signal acquisition system is mainly described in single-chip temperature control system for acquisition of hardware circuit design and software development, debugging process. Of the system include: temperature
11、 acquisition and A / D conversion, data processing, data display, signal amplification circuit, alarm circuit most five. System is the temperature functions of detection, numerical display. AD590 temperature sensor to detect temperature on the environment, and by the A / D converter ADC0809 into a d
12、igital temperature signal, a single bus transfer to the single-chip, single-chip microcomputer as the data processing and control unit, in order to carry out data processing, a single Control the number of temperature sensors, the temperature signal from a single-bus digital temperature sensor on th
13、e transmission to the single-chip microcomputer. Single-chip data processing, the issue of control information and control to change the alarm status of the implementation of modules, at the same time, current temperature information is sent to the LED display, the issue of control signals to contro
14、l LED and buzzers purposes. Temperature signal acquisition can be realized into shows and alarm functions! Design and layout of the system is simple, small size, light weight, cost-effective, easy to expand. Use of appropriate technologies to simulate the temperature of the volume into a digital, al
15、though in principle is not difficult but the cost is higher, but also encountered other problems. Therefore, single-chip temperature control system has an important purpose and significance of the design introduced in digital thermometer with a traditional thermometer, compared with a reading of convenience, a wide range of temperature measurement, temperature measurement accuracy, the output of the temperature digital display, the main for more accurate temperature measurement sites, or research laboratory. Key words: Single-chip, temperature sampling, drive circuit, showing， AT89C51
