毕业论文：基于单片机的温度自动控制系统设计.doc

PAGE  PAGE 46 成都理工大学工程技术学院毕业论文 基于单片机的温度自动控制系统设计 作者姓名：胡力 专业名称：应用电子技术 指导教师：何 勇 讲师 基于单片机的温度自动控制系统设计 摘要 温度的检测与控制是工业生产过程中比较典型的应用之一，随着传感器在生产和生活中的更加广泛的应用，利用新型单总线式数字温度传感器实现对温度的测试与控制得到更快的开发，本文设计了一种基于AT89C51的温度检测及报警系统。该系统将温度传感器AD590通过模拟放大电路接在模数转化器ADC0809的输入端，然后将ADC0809的输出端接在控制器的一个端口上,对传感器温度进行采集,将采集到的温度值与设定值进行比较,当低于设定的上限温度时,通过打开加热电路来使温度自然冷却。文中给出了系统实现的硬件原理图及软件流程图。经实验测试表明,该系统测量精度高、抗干扰能力强、报警及时准确,具有一定的参考价值。该系统设计和布线简单，结构紧凑，体积小，重量轻，抗干扰能力强，性价比高，扩展方便，在大型仓库，工厂，智能化建筑等领域的多点温度检测中有广阔的应用前景。 关键词：AD590；ADC0809；AT89C51；CD4511。 Abstract Temperature detection and control of industrial production processes typical of one of the applications, with sensors in production and living in the more widely used, Li Yong of new single-bus digital temperature sensor to achieve on the test and control the temperature more rapidly development, the paper design based on AT89C51 temperature detection and alarm system. The system will AD590 temperature sensor connected via analog amplifier module input converter ADC0809, ADC0809 and then the output termination of a port on the controller, temperature sensor acquisition, will be collected and set the temperature value constant comparison, when the temperature exceeds the upper limit set by closing the heating circuit to make the temperature of natural cooling. This paper presents the hardware implementation of the system schematic diagram and software flow chart. The experimental test shows that the system with high precision, strong anti-interference capability, alarm timely and accurate, with some reference value. The system design and layout is simple, compact structure, small size, light weight, anti-interference ability, cost-effective, easy expansion, in large warehouses, factories, construction and other areas of intelligent multi-point temperature measurement in a wide application prospect. Key words: AD590；ADC0809；AT89C51；CD4511. 目录  TOC \o 1-3 \h \z \u  HYPERLINK \l _Toc263413441 摘 要 I  HYPERLINK \l _Toc263