ATmega8单片机温室环境多参数测控系统无线节点软硬件设计.doc

ATmega8单片机温室环境多参数测控系统无线节点软硬件设计 摘要温室环境多参数测控系统综合应用了现代传感器、电路与系统、智能控制及无线传感器网络技术等相关知识，完成了系统前端的温室环境的温度、湿度的数据采集单元和发送单元的研究。本文主要讲述无线节点发送端的设计，该系统利用单片机ATmega8发送测量指令控制温湿度传感器SHT11，使其测量温室的温度和湿度两参数，并将数据进行处理，之后经过无线传输模块将数据发送至接收端，接收端实现与上位机之间的数据通信，实现对温湿度数据的采集。6424 经过试验研究表明，该系统能够满足目前对温室大棚内温度、湿度的实际监测与控制要求。 关键词温湿度无线传感器节点单片机ATmega8SHT11 毕业设计说明书（论文）外文摘要 TitleGreenhouse environment measurement system of wireless node (Hardware and software design ) Abstract Comprehensive application of modern sensors, circuits and systems, intelligent control and wireless sensor network technology for greenhouse environment multi-parameter intelligent monitor and control system, completes the data acquisition and transmission unit design of the greenhouse environment temperature and humidity. This article focuses on the design of the sender of the wireless nodes,the system utilizes the microcontroller ATmega8 to control the temperature and humidity sensors SHT11, send measuring instructions, make it measure two parameters of the greenhouse temperature and humidity, to realize temperature and humidity data acquisition and data processing, after through the wireless transmission module will send data to the receiver, The receiver for data communication between the host computer. The experimental studies show that the system can meet the current actual monitoring and control requirements of the greenhouse temperature, humidity concentration. 3.1.3晶振电路11 3.1.4ISP程序下载接口电路设计12 3.2信号电平转换电路设计12 3.3温湿度传感器电路设计13 3.4无线传输模块14 3.5电源模块硬件电路设计16 3.6硬件电路板设计17 3.7本章小结18 4节点软件设计19 4.1主程序19 4.2无线传输通信协议21 4.3串口子程序22 4.3.1串口初始化子程序22 4.3.2串口数据发送子程序23 4.4SHT11子程序24 4.4.1SHT11测量总程序24 4.4.2SHT11初始化子程序25 4.4.3温湿度数据补偿子程序26 4.5接收端控制器软件程序流程28 4.6本章小结29 5实验研究30 5.1实验环境30 5.2实验过程30 5.3实验结果分析30 5.3.1温度试验结果分析30 5.3.2湿度试验结果分析32 5.3.3实验结果总结34 5.4误差分析34 5.4.1误差来源34 随着无线传感器网络技术的快速发展，人们也开展了温室无线监测系统的应用研究。例如：北京市科委计划项目ldquo;蔬菜生产智能网络传感器体系研究与应用rdquo;正式把无线传感器网络示范应用于温室农作物生产中；2008年10月，上海市计算机研究所研发三部已将自主知识产权的自组织树型无线传感器网络系统应用到了上海奉贤花卉大棚监测系统中，大大