摘要图书馆作为一个收藏资讯、原始资料、数据库并提供相关查询服务的场所，在日常运营中除了要做好书籍的管理外，还要维持好图书馆良好的环境，因为温湿度对纸质文献材料的影响非常大。通过测试仪器对温度和湿度进行人工检测，这种方法效率低而且误差大，并且传统的图书馆温湿度监控系统存在扩展性差、组网不便以及维护成本高等问题。针对以上问题，基于单片机MSC-51系列中AT89S51、温湿度传感器SHT11和nRF401芯片，本文提出了一种低成本温湿度检测远程控制系统的方案。84843

本次论文设计的内容主要包括系统硬件电路的设计和系统软件程序的设计两大部分：

硬件电路主要分为6个模块：单片机模块、温湿度传感器模块、显示模块、报警器模块、无线传输模块以及控制设备模块。其中单片机模块与无线传输模块构成数据采集；液晶显示器模块构成系统的显示；温、湿度控制电路由温湿度传感器模块和报警器模块构成。图书馆工作人员根据书籍储藏环境的需要预先输入预设的温湿度值，当实际测量的温湿度不符合预设的温湿度标准时，蜂鸣器蜂鸣发出报警信号，启动相应的温湿度控制电路。

系统软件主要分为5个模块：主程序模块、温湿度测量子程序模块、显示子程序模块、无线接发程序模块及按键程序模块。

毕业论文关键词：AT89S51；SHT11；nRF401；图书馆；远程控制系统

Abstract A library is a place or a building in which information are collected such as books, newspapers, music, video recordings, raw data and database are kept and provides the service of related inquiry。 We should not only consider good management of books, but should also maintain a good library environment in daily operations, because temperature and humidity have great effects on paper documents。 We can test temperature and humidity by testing equipments manually, but this approach is inefficient and has great error。 And the traditional control-system of temperature and humidity exists the problems of networking inconvenience, poor scalability and the high cost of maintenance。 In view of the above problems, based microcontroller MSC-51 series AT89S51, temperature and humidity sensor SHT11 and nRF401 chip, this paper presents a low cost temperature and humidity detection of remote control system。

The content of this paper mainly includes the design of the hardware circuit and the design of the system software:

The hardware circuit mainly consists of 6 modules: single chip microcomputer, temperature and humidity sensor, display module, alarm, wireless transmission and control equipment。 The microcontroller and wireless transmission constitutes a data acquisition module; liquid crystal display system consisting of a display module; temperature and humidity control circuit consists of a temperature and humidity sensor and an alarm circuit, library staff according to the needs of pre entered the preset value, when the actual measurement of temperature and humidity does not conform to the preset temperature and humidity standard, issued alarm signal, namely Buzzer Ming, start the corresponding control。

The software system is pided into five modules: the main program module, temperature and humidity measurement subroutine module, display subroutine module, wireless transceiver module and key program modules。

Key words：AT89S51, SHT11, nRF401, Library, Remote Control System

目录

第一章 绪论 1

1。1 课题背景和研究意义 1

1。2 研究现状 1

1。3 论文的主要内容 3

第二章