毕业设计（论文）-基于AT89C51单片机的温度智能控制系统设计精选.doc

 2012届毕业设计(论文) 题 目 温度智能控制系统设计 专 ?业? 班? 级 2008自动化05 学 ?号 姓 ?名 指 导 教 师 学 院 名 称 电气信息学院 2011年 5 月 27 日 温度智能控制系统设计 Intelligent temperature control system design 学 生 姓 名: 指 导 教 师: 摘 要 随着电子产品向智能化和微型化的不断发展,单片机已成为电子产品研制和开发中首选的控制器。为了更好地推广单片机在实际生活和生产中的应用,本文介绍一种基于单片机AT89C51设计的温度控制系统，以实现系统能自主调节温度的功能。 该温度系统采用温度传感器DS1820来获得当前温度，并以数字信号的方式传送给单片机。采集的温度与从4X2矩阵键盘输入的温度值进行比较，并通过液晶显示器LCD显示出来。如果采集温度低于设置温度，系统将通过继电器模块自动控制升温；如果采集温度高于设置温度，系统将通过继电器模块自动控制降温。 文中介绍了该控制系统的硬件部分，包括：温度采集电路、温度设置电路、温度显示电路、继电器电路等。文中还着重介绍了软件设计部分。里采用模块化结构，主要模块有：温度采集模块、键盘扫描及按键处理模块、温度显示模块、温度比较模块、继电器控制模块。 经实际制作表明该温度控制系统具有体积小、操作灵活、可靠性高、实用、成本低等特点,具有一定的实际意义。 关键词：单片机AT89C51；温度控制；温度传感器DS1820；液晶显示器LCD Abstract With the electronic products developing to intelligent and miniaturization, single chip has become the first chosen controller which is used to develop and explore the electronic product. In order to promote single chip applicating in real life and production, the paper will introduce a temperature control system which is based on a kind of single chip AT89C51, and it can achieve the function that the system can regulate the temperature independently. The temperature system adopts the temperature sensor DS1820 to get the current temperature, and transfer it to the microcontroller with the way of digital signal. The acquised temperature will be compared with the temperature which is put in by 4X2 matrix keyboard, and will be displayed by liquid crystal display. If collected temperature below the set temperature, the system will automatically control to heat up by the relay modules. If collected temperature higher than the set temperature, the system will automatically control to reduce by the relay modules. The paper introduces the hardware which is part of the control system, including: temperature acquisition circuit, temperature setting of the circuit, temperature display circuit, relay circuit and so on. The paper has also mainly in