基于multisim多路温度检测系统设计与仿真.doc

摘 要 随着社会的发展和技术的进步，人们越来越注重温度检测与显示的重要性。温度检测与状态显示技术与设备已经普遍应用于各行各业，市场上的产品层出不穷。温度检测及显示也逐渐采用自动化控制技术来实现监控。课题就是一个温度检测及状态显示的检测系统。 文章介绍了一种基于AT89单片机为基础的温度智能巡检系统，并且阐述了构成本系统的基本原理、硬件组成及相应的软件设计。系统的主电路部分是以AT89单片机为核心，用A/D转换器将模拟信号转换成数字信号，送到单片机中进行处理并由 LCD 显示。其软件部分由C语言编程完成，C语言是一种编译型程序设计语言，它兼顾了多种高级语言的特点，并具备汇编语言的功能。同时用Multisim进行高效快速的仿真。 关键词：单片机；温度；检测；  Abstract With the development of society and the technological progress, people pay more and more attention to the importance of temperature detection and display. Temperature detection and status display technology and equipment has been widely applied in industries, products on the market emerge in endlessly. Temperature testing and also gradually adopt the automatic control technology to realize the monitor. This topic is a temperature testing and status of the detection system. This article describes an approach based on AT89C51 single-chip microcomputer-based detection system of temperature and composition on the basic principles of the system, hardware components and the corresponding software design. Main circuit of the system as the central part of the AT89C51, A/D converter to analog signals into digital signals, then be processed in single-chip by the LCD. The software partly by the C programming language, C language is a compilation of programming language, it has both the characteristic of high-level language, and assembly language functions. At the same time, we can use the MULTISIM to simulate this system quickly. Key words：Single-chip； Temperature；Measuring；A/D conversion；Multisim 目录 1 绪论 1 1.1 课题背景和意义 1 1.2 课题任务 1 1.3 课题总体设计方案 1 2 软件介绍 2 2.1 Multisim介绍 2 2.2 Multisim特点及应用 4 3 硬件电路设计 5 3.1 系统电路图 5 3.2 单片机电路设计 5 3.2.1 单片机介绍 5 3.2.2 单片机最小系统设计 9 3.3 A/D转换电路设计 10 3.3.1 A/D芯片介绍 10 3.3.2 A/D芯片和单片机接口设计 12 3.4 显示器电路设计 13 3.4.1 LCD显示器介绍 13 3.4.2 LCD与单片机接口设计 16 3.5 其他外围设备 18 3.5.1 时钟电路的设计 18 3.5.2 led灯警报电路设计 18 3.5.3 温度检测电路设计 19 4 程序设计 20 4.1 主程序设计 20 4.1.1 主程序设计流程图 20 4.1.2 主要程序 21 4.2 温度显示程序设计 23 4.3