毕业设计AT89C51单片机的研究.doc

本科生毕业设计（论文） 基于AT89C51单片机 系统的研究 学 院、系： 电气与信息工程学院 专 业： 电子信息工程 学 生 姓 名： 班 级： 电信 学号 指导教师姓名： 职称 教授 职称 助教 最终评定成绩 年6月 摘 要 湿度检测在工业、农业、国防等行业有着广泛的应用。利用单片机技术的系统以其体积小，可靠性高而被广泛采用。ABSTRACT The humidity examination which is widely used in industry, agriculture, national defense and so on .the humidity examination which is widely used because that the system which uses microcontroller technology is volume small and reliability. This article has carried on the analysis design to the humidity examination system. First, the application and development condition of the humidity examination technology is made a simple introduction. And then, the humidity examination of commonly used method which has enumerated the characteristic as well as each one .The point of the article is the design of the hardware and software. In the process of hardware designing, the function and the characteristic of each part of electric circuits which has made a simple introduction in detail. Meanwhile, the humidity sensor HM1500 and the chip of the A/D transformation to the system in TLC1549 have been made the simple introduction. In the process of software designing, I have drawn up each program module flow chart, and introduced each module function in detail. Then to the procedure repeatedly revision, it has been consummated the software system. Finally, I has completed the over all system designing. This system have the characteristic of sensitivity high and the reflection time is short, and so on .It has the intellectualization, and programmable and small, then takes along short, and so on. It believed that this system has the widespread application . Keywords：?MCU,?humidity examination，software?system,?hardware?system 第1章 绪论 1 1.1 湿度的基本概念 1 1.2 湿度检测的应用领域 1 1.3 常见的湿度