毕业设计论文—基于单片机的粮仓温度控制系统.doc

毕业设计论文 ------基于单片机的粮仓温度控制系统 系 别 自动化工程系 专 业 测控技术与仪器 班 级 姓 名 指导教师 2009年5 月 5 日基于单片机的粮仓温度控制系统 摘 要 随着单片机技术的飞速发展，单片机在各个领域得到了广泛的应用。粮食是人类生存的必需品，温度是保存好粮食的先决条件，储存大量的粮食对稳定国民经济的发展起到至关重要的作用。粮库一般较大，测量点会很多。粮仓温度测量方法以及相应的智能控制一直是粮食保存的一个重要问题。 该系统是以AT89C51单片机和DS18B20数值温度传感器为核心组成的粮仓温度控制系统。该系统利用AT89C51单片机采集了各个温度点的温度，实现温度显示、报警等功能。它以AT89C51单片机为主控制芯片，采用数字温度传感器DS18B20实现多路温度的检测，利用LCD1602液晶显示器形象直观的显示测出的温度值。本文在确定法设计方案基础上，着重论述了系统的软硬件设计，并且描述了系统电路设计、硬件设计框图及所使用各种芯片功能和特性。通过PROTEUS软件和KEIL C仿真出了该系统。 　　 关键词：单片机 DS18B20 液晶显示 键盘 报警 Temperature Control System Of The Granary Based On Single-chip Author： Tutor：Abstract Along with the single chip microcomputer technology rapid development, the microcontroller obtained the widespread application in each domain. The grain is the human survival essential item，the temperature is the precondition of preserving the grain well, storing up the massive grain plays a crucial role in the development of the stable national economy. Provision room is generally big, so there will be a lot of measurement points. Grain temperature measurement method and the corresponding intelligent control of food preservation has been an important issue. The system is based on AT89C51 single-chip and numerical temperature sensor DS18B20, which composite the core temperature control system. This system has gathered each temperature using AT89C51 monolithic integrated circuit, which realizes functions temperature display and alarm functions and so on. It takes AT89C51 monolithic integrated circuit as main control chip, which uses digit temperature sensor DS18B20 to realize the multi-channel temperature detections. Temperature value which determines is displayed using the LCD1602 liquid-crystal in direct-viewing demonstration. This article focus