基于单片机的无线温湿度采集系统的的设计

基于单片机的无线温湿度采集系统的的设计目录设计总说明 ......................................................................................... 错误!未定义书签。

Design General Information (I)1 绪论 01.1 引言 01.2 选题背景及意义 01.3 国内外现状及发展趋势 (1)2 设计要求 (2)3 系统总体方案 (3)3.1 温湿度传感器的选择 (3)3.2 无线发射模块的元器件选择 (4)3.2.1 nRF905主要包括三种接口 (4)3.2.2 nRF905的工作模式 (5)3.3 单片机的选择 (6)3.4 显示模块的选择 (9)4 硬件电路设计 (11)4.1 温湿度采集模块的设计 (11)4.2 无线发射接收模块设计 (12)4.2.1 温湿度数据的控制发送 (12)4.2.2 温湿度数据的接收 (13)4.2.3 模拟SPI口的实现 (14)4.3 LCD1602液晶显示模块设计 (14)4.3.1 LCD1602的指令说明及时序 (16)4.4 电源模块的设计 (18)4.5 复位电路 (18)5 单片机对温度与湿度的控制 (19)6 软件设计 (20)6.1 采集模块软件设计 (20)6.2 发送接收模块软件设计 (21)6.3 显示模块软件设计 (26)7 调试 (27)结论 (28)参考文献 (30)附录A 系统总体原理图 (32)附录B 采集检测控制程序 (32)附录C 元器件清单 (47)致谢 (49)系列随着温湿度计的发展温室监控系统也越来越成熟，更好的为人们服务。

对于国内外对温湿度检测的研究，从复杂模拟量检测到现在的数字智能化检测越发的成熟，现在的对于温湿度研究，检测系统向着智能化、小型化、低功耗的方向发展。

在发展过程中，以单片机为核心的温湿度控制系统发展为体积小、操作简单、量程宽、性能稳定、测量精度高，等诸多优点在生产生活的各个方面实现着至关重要的作用。

本设计以AT89S52为主要芯片，利用数字式温湿度传感器SHT10采集温湿度，把收集到的数据传给单片机AT89S52，再用无线发射模块nRF905将经过处理的数据发射出去。

单片机通过模拟SPI口跟nRF905之间传送数据。

同时，nRF905具有接收功能，接收模块的nRF905将接收到的数据传给AT89S52，最后用数字显示屏LCD1602将经过单片机处理后的数据显示出来。

整个系统的软件编程就是通过C语言程序对单片机AT89S52实现控制功能。

单片机体积小，价格低，且稳定性较强，操作灵活简单，误差较小，具有很高的应用价值。

本系统结构紧凑，简单可靠，操作灵活，功能强大，性能价格比高，较好的满足了现代生产和科研的需要。

关键词：AT89S52；SHT10；nRF905；采集与控制MCU Wireless Temperature and Humidity Acquisition SystemBasedDesign General InformationTemperature and humidity plays an important role in the industrial and agricultural production, agricultural production is an important component of the data. Too high temperature and humidity can cause mildew sprouting grain, can also cause a range of diseases of greenhouse vegetables. Therefore, its timely and accurate measurement is particularly important. The measurement process is generally more complex and cumbersome, error is larger. Such as mercury now used to detect alcohol thermometer for temperature and humidity detection using traditional methods of physical analog, which detects the temperature and humidity meter scale intervals are usually secret, is not easy to accurately distinguish, reading difficulties, and their Heat capacity is still relatively large, reaching thermal equilibrium time required for longer, making it difficult to read standard and is very inconvenient to use.With the rapid development and popularization of science and technology, more and more high-performance equipment, temperature and humidity all walks of life are increasingly high requirements. The traditional model is based on temperature and humidity monitoring human basis, relying on artificial shifts, artificial tour to see other ways to measure and record the environmental status information. In this mode, only inefficient, but also waste a lot of human resources and financial resources, and the lack of science, because many major accidents are caused by human factors, the lack of a complete manual maintenance management system. The wireless monitoring system can solve such a waste of human resources, management is not timely issue, which is due to its intelligent design decisions. It works as follows: temperature and humidity sensor; microcontroller to determine the temperature and humidity sensor is abnormal; If abnormal temperature and humidity sensors to implement measures to regulate; determine whether an exception than a preset time, if it exceeds the presettime, the output abnormal signal alarm; determine whether an exception is processed, if the deal is completed, disarm the alarm. So you can use the controller to monitor temperature and humidity of the room, in order to achieve real-time performance and effectiveness of the environmental temperature and humidity management. Therefore, this design also has widespread implications for similar projects.Smart temperature sensors (also known as digital temperature sensor) in the mid-1990s come out. It is a micro-electronics technology, computer technology and automated testing techniques crystallization. At present, the international community has developed a variety of intelligent temperature sensor products. Internal smart temperature sensors include a temperature sensor, A / D transducer, a signal processor, a memory (or register) and an interface circuit. Some products also with multiplexer, the central controller (CPU), random access memory (RAM) and read-only memory (ROM). Intelligent temperature sensor can output temperature data and associated temperature control volume, fit a variety of microcontroller (MCU), and can be implemented by software testing capabilities, the thermometer has become increasingly intelligent. With the same thermometer hygrometer With the development of electronic humidity sensor mature. Now commonly used temperature sensor AD590, DS18B20 and humidity sensor HMxx series HS1xx series, SHT series along with the development of greenhouse hygrometer monitoring system is also more mature, better for the people. For the studies on temperature and humidity testing, testing from the complexity of the analog to digital intelligent detection is now more mature, and now for the temperature and humidity studies toward intelligent detection systems, miniaturization, low-power direction. In the development process, a microcontroller as the core temperature and humidity control system development, small size, simple operation, wide range, stable performance, high accuracy, and many other advantages in all aspects of production and life to achieve a critical role.The design AT89S52 as the main chip, the use of digital temperature and humidity sensor SHT10 collecting temperature and humidity, the data collectedpassed microcontroller AT89S52, then nRF905 wireless transmitter module will transmit the processed data out. Microcontroller via SPI port with analog transmission of data between the nRF905. Data Meanwhile, nRF905 with reception, nRF905 receiver module will receive the pass AT89S52, and finally with digital display LCD1602 will go through the data processing after the microcontroller is displayed. Software programming of the system is through the C language program microcontroller AT89S52 control functions. SCM small size, low price and strong stability, flexible and simple operation, the error is small, with a high value.The system is compact structure, simple, reliable, flexible, powerful, high cost performance, better meet the needs of modern production and research. Keywords: AT89S52; SHT10; nRF905; acquisition and control.1 绪论1.1 引言温度湿度在工农业生产中占有很重要的地位，是工农业生产的重要组成数据。