发布时间 : 星期三 文章基于单片机的粮仓温湿度多点无线监测系统设计毕业论文更新完毕开始阅读abf870a00640be1e650e52ea551810a6f424c8cd
本科毕业设计
基于单片机的粮仓温湿度多点无线
监测系统设计
摘要
温湿度是一个非常重要的参数。在工业、医疗、军事和生活等许多地方，都需要用到测温湿装置来监测温湿度。传统直接布线测量不能满足要求，特别是在某些环境恶劣的工业环境和户外环境，通过直接布线测量不现实。因此采用无线传输温湿度信息尤为必要。
目前有些设计能够实现无线温湿度监测，但价格过高是其最大的缺点。在实际温湿度控制过程中既要求系统具有稳定性、实时性又需要降低功耗。因此设计一种低功耗的无线温湿度监测系统很有意义。本文提出一种针对无线数据传输问题的解决方案，该方案基于nRF24L01来设计无线温湿度采集系统。该系统采用传统单片机ATmega16L和数字温湿度传感器AM2301来构成多点、实时的无线温湿度监测系统。通过简单的无线通信协议，实现可靠性与功耗平衡，该系统能实现对温湿度的监测，是可以实现远程控制的无线温湿度监测系统。
该系统利用无线通信技术构建了分布式无线传感器网络，通过传感器节点实现温湿度信息的采集和传输，系统具有组网简单，维护方便，运行费用低等优点，能够实现可靠的无线数据传输。可以应用于大型粮仓温湿度的监测。 关键字：ATmega16 AM2301 无线传输 nRF24L01
Wireless Temperature and Humidity Monitoring System in Barn
Shi Jianzhu
(College of Engineering, South China Agricultural University, Guangzhou 510642, China) Abstract:Temperature and humidity is a very important parameter. In many places, such as the industrial, medical, and military, you need the temperature and humidity measurement device to monitor temperature and humidity. Direct wiring measurement does not meet the requirements, especially in some environments, such as, harsh industrial environments and outdoor environments. Therefore, the wireless transmission of temperature and humidity information is particularly necessary.
At present, some devices can be used to monitor wireless temperature and humidity, but the price is the biggest drawback, the price is too high. The system must be stable, real-time and low power consumption in actual control. Therefore, the design of a low-power consumption wireless temperature and humidity monitoring system makes sense. This paper presents a solution for wireless data transmission, the program is based on the nRF24L01 to design the monitorint system of wireless temperature and humidity. The system uses the traditional microcontroller ATmega16 and digital temperature and humidity sensor AM2301 to form multi-point, real-time wireless temperature and humidity monitoring system. Through a simple wireless communication protocols, bring about reliability and power balance. The system is a remote wireless temperature and humidity monitoring system.
The system uses wireless communication technology to build a distributed wireless sensor networks. The temperature and humidity data acquisition and transmission based on sensor nodes, with a simple network, easy maintenance, low operation cost. The system can be applied to a large granary temperature and humidity monitoring. Key word: ATmega16 AM2301 Wireless Transmission nRF24l01
目 录
1 前言....................................................................................................................................... 1 2 系统方案分析与选择论证................................................................................................... 1 2.1 系统最终方案................................................................................................................... 1 2.2 系统方案设计................................................................................................................... 2 2.2.1 主控芯片方案................................................................................................................ 2 2.2.2 无线通信模块方案........................................................................................................ 2 2.2.3 温湿度传感器方案........................................................................................................ 3 2.2.4 显示模块方案................................................................................................................ 3 3 主要芯片介绍和系统模块硬件设计................................................................................... 4 3.1 ATmega16L-8AI单片机.................................................................................................. 4 3.2 nRF24L01无线模块 ........................................................................................................ 5 3.2.1 nRF24L01模块电路图 ................................................................................................. 5 3.2.2 nRF24L01模块接口电路 ............................................................................................. 5 3.2.3 nRF24L01模块供电电源 ............................................................................................. 6 3.2.4 nRF24L01模块工作模式 ............................................................................................. 6 3.2.5 nRF24L01模块工作原理 ............................................................................................. 7 3.2.6 nRF24L01配置字 ......................................................................................................... 8 3.3 数字温湿度传感器 AM2301 .......................................................................................... 8 3.3.1 AM2301概述 ................................................................................................................ 8 3.3.2 AM2301接口及温湿采集电路 .................................................................................... 9 3.3.3 AM2301工作原理 ........................................................................................................ 9 3.4 显示模块TFT-LCD ....................................................................................................... 10 4 系统软件设计..................................................................................................................... 11 4.1 单片机软件设计............................................................................................................. 11 4.1.1 发送端流程.................................................................................................................. 11 4.1.2 接收端流程.................................................................................................................. 12 5 硬件电路............................................................................................................................. 13 5.1 硬件制作......................................................................................................................... 13