基于单片机智能温室温湿度控制系统设计.doc

基于单片机的智能温室温湿度控制系统的设计 摘要：在农业生产中，温室大棚的应用越来越广泛，为人们创造了更高的经济效益。在温室大棚中，最关键的是温湿度控制方法。传统的温湿度控制方法完全是人工的，不仅费时费力，而且效率低。本文旨在论述一种温室大棚温湿度控制系统的设计，该系统主要由单片机AT89S52、温湿度传感器DHT11、无线通信模块nRF2401、液晶显示LCD1602等组成。采用温湿度传感器DHT11来测量温湿度，它的精确度高，而且DHT11直接是输出数字信号，可直接与单片机相连。通过无线传感器nRF2401来进行信号传送，这样能够降低布线的麻烦。显示部分使用的是LCD1602来显示温湿度。本系统的核心是单片机AT89S52，接收传感器所测的数据并处理，然后执行各种操作。本系统智能度高，可靠性高，系统工作稳定，且综合性价比较高，具有较大的市场应用前景。 关键词：单片机，温湿度控制系统，温湿度传感器DHT11，LCD显示，无线模块nRF2401 Design of temperature and humidity intelligent greenhouse control system based on SCM Abstract :In agricultural production, more and more extensive application in the greenhouse, create more economic benefits for the people. In the greenhouse, the most critical is the temperature and humidity control method. Temperature and humidity control of traditional methods is entirely artificial, not only time-consuming effort, and low efficiency. The system consist of the microcontroller AT89S52 ,digital temperature and humidity sensor DHT11,wireless sensor NRF2401,LCD1602 and other components. To measure the temperature and humidity using temperature and humidity sensor DHT11, its precision is high, and the DHT11 is directly output digital signal, can be directly connected with the single-chip microcomputer. Through the NRF2401 to transmit signals, it can reduce the trouble of wiring. The display part is using LCD1602 to display the temperature and humidity. The core of this system is AT89S52, the measured sensor data received and processed, and then perform various operations. The system of high intelligence, high reliability, the system is stable, and the higher price, has great market prospect. Keyword:SCM, Temperature and humidity control system, Temperature and humidity sensor DHT11, LCD display, Wireless module NRF2401 目录 1 引言 1 1.1 课题背景 1 1.2 立题的目的及意义 1 1.3 国内外的研究现状及发展趋势 2 1.4 本系统主要研究内容 3 2 系统总体设计 3 2.1 系统功能设计 3 2.2 系统的组成 4 2.3 系统工作原理 4 3 系统硬件设计 6 3.1 单片机系统设计 6 3.2 温湿度传感器设计 11 3.3 无线模块设计 16 3.4 液晶显示装置设计 21 3.5 报警系统设计 23 4 系统软件设计