【作者】 杨帆；

【导师】 廖桂平；

【作者基本信息】 湖南农业大学 ， 作物信息科学， 2009， 硕士

【摘要】 在作物生产管理决策中,作物生长的信息获取是极其重要工作。作物生长信息获取的自动化、网络化、智能化是作物信息科学的重要研究方向。随着网络的迅猛发展,集传感器技术、微机电系统技术、嵌入式计算机技术、分布式信息处理技术和无线通信技术于一体的无线传感器网络就成为当今研究的热点。无线传感器网络是一个多学科交叉的综合性科学研究领域,在众多领域如军事、智能家居、森林保护等方面有着广泛的用途和研究价值,尤其在温室环境测量、精准农业、大田灌溉、畜牧养殖、林业等方面都有广阔的应用前景和推广价值。本文简介了无线传感器网络在农业应用方面国内外的研究现状,阐述了课题的意义。在深入分析无线传感器网络体系结构的基础上,结合作物生长自然环境信息采集的需求,构建了一个可以对温度、湿度和光照强度等三个基础数据进行自动采集的无线传感器网络,重点在于无线传感器网络的构建。根据所使用的JN5121芯片传感器节点的特点,通过小数点移位和分割整数法对传感器节点测量的温度、湿度数据实现了精度化采集,然后通过模拟实验,分析精度化数据的意义以及无线传感器网络应用于作物生长自然环境中的可行性,为相关研究提供了一个科学的支持。同时,设计并实现了传感器节点与PC机的串口通信,获得的温度、湿度和光照强度数据存入数据库。分析了JN5121芯片传感器节点的局限性,提出研究网络仿真工具NS,阐述了使用网络仿真工具的目的和意义。更多还原

【Abstract】 It is important to get crop growth information for crop production management decision-making. The automation, networking and intellectualization of crop growth information acquisition in crop information area are significant research direction. With the rapid development of network, the wireless sensor network research which combine the sensor technology, micro-electromechanical systems technology, wireless communication technology, embedded computer technology, distributed information processing technology and wireless communications technologies as one, has become today’s research hot field. The wireless sensor network has extensive applications and research values in a lot of fields just like the Military, Smart home, Forest conservation and so on, especially in greenhouse, precision faming, irrigation in farmland, pasturage and breed aquatic agriculture application.This paper brief introduces the research status at home and abroad of wireless sensor network application in agricultural research field. And the significance of my subject is described. The construction of a wireless sensor network which could automatically monitor the temperature, humidity and light intensity is based on deeply analyzing the architecture of wireless sensor network and combining with the demand of information collection in natural environment of crop growth. The focal point is the construction of the wireless sensor network. According to the characteristics of the JN5121 chip sensor nodes which are used in this research, it implements the precision of temperature data, humidity data and light intensity data which are measured by the sensor nodes by the method of shift of decimal point and dividing the integer. Through some simulation experiments, the significance of the precision of data and the feasibility of wireless sensor network application in natural environment of crop growth information collection are analyzed. Those results of the simulation experiments provide a scientific support for related research. The communication between the PC port and the sensor node has been designed and realized. The temperature data, humidity data and light intensity data are stored in the Database. The limitations of JN5121 chip sensor node are analyzed, and the research of a network simulation tool-NS is put forward,and the significance and purpose of using NS in the wireless sensor network research are described.更多还原