[信息与通信]温度自动控制的设计.doc

本科毕业论文(设计) 题 目： 温度自动控制系统的设计 学 院： XXX 专 业： XXX 班 级： XXX 姓 名： XXX 指导教师： XXX 2011年 6 月 6 日 温度自动控制系统的设计 The Design of Automatic Control System of Temperature摘 要 在现代社会的快速发展中，为了保障生活生产的快节奏、便利化和安全性，常常要实现温度的自动控制。若采用单片机来实现，不仅具有简捷灵活，便于控制等优点，而且可以在很大程度上提高温度的被控参数，保证产品的质量。本文以AT89C51单片机为基础，结合DS18B20串行数字温度传感器以及LCD1602显示器，设计了一种温度自动控制系统。在本系统中，单片机是核心器件，温度传感器负责温度的采集，并通过单片机对温度进行控制然后再在LCD上显示。在程序中可设定温度预设值，若温度低于下限值，则单片机通过继电器控制加热器进行加热；若温度高于下限值，则在某个温度范围内不需要加热。该系统具有结构简单，价格低廉，控制精度高等优点，系统测试以及运行结果表明基于该方法具有较好的优越性。 关键词 AT89C51单片机 温度传感器 温度采集 温度控制 温度显示 Abstract In the fast development of modern society, in order to guarantee the fast rhythm of life production safety and facilitation, it’s often needed to realize temperature automatic control. If the one-chip computer is to realize in this system, not only has the advantages of concise flexible, and to control can greatly increase the controlled parameters of temperature, but also can guarantee the quality of its products. This paper is based on AT89C51, combining DS18B20 serial digital temperature sensors and LCD1602 display, designing a kind of automatic temperature control system. In this system, the microcontroller is the core device; the temperature sensor is responsible for the collection of temperature, and through the single-chip microcomputer control of temperature which is displayed on LCD again. The temperature in the program can be set the default, if temperature is below the lower limit value, MCU will control the heater to heat through the relay; If the temperature is higher than the lower limit in a range, it doesnt need to heat. The system has a simple structure, low prices, and the advantages of high control accuracy, in addition, the system test and operation results show that based on the method has a good superiority. Key words AT89C51 microcontroller Temperature sensor Temperature gathering Temperature