橘园无线传感器网络不同节点部署方式下的射频信号传播试验  

Test of wireless sensor network radio frequency signal propagation based on different node deployments in citrus orchards

作　　者：文韬[1] 洪添胜[1] 李震[1] 黄森[1] 李加念[1] 叶智杰[1] 

机构地区：[1]华南农业大学工程学院南方农业机械与装备关键技术省部共建教育部重点实验室国家柑橘产业技术体系机械研究室,广州510642

出　　处：《农业工程学报》2010年第6期211-215,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家公益性行业(农业)科研专项经费项目(200903023);现代农业产业技术体系建设专项资金项目(农业部文件;农科教发[2007]14号;财政部文件;财教[2007]431号);国家自然科学基金项目(30871450)

摘　　要：为解决橘园中无线传感器网络(WSN)规划和快速部署问题,该文基于无线射频信号的传播特性,研究了橘园中WSN射频信号与影响因素间的关系。试验中选取433MHz载波频率,基于连续无线电波分析了WSN射频信号受植被深度、天线高度和通信距离等因素联合作用下射频信号在橘园的衰减情况,建立了橘园中不同影响因素作用下,433MHz无线射频信号接收强度与环境传播因子及通信距离间的线性模型,拟合曲线的R2最低为0.797,最高为0.980,验证了此模型用来预测橘园中影响因素对接收信号强度衰减趋势的可行性;得到了基于无线射频信号接收强度指示下不同植被深度、天线高度和通信距离变化联合作用下的最佳天线高度分布表,为无线传感器网络在橘园中的节点部署提供指导。In this paper,for configuring WSN system architecture and node deployment in citrus orchards,relationship between wireless sensor network（WSN）radio frequency（RF）signal strength attenuation and the corresponding influential factors was studied based on radio wave propagation characteristics.In this study,a carrier frequency being 433MHz was selected and the attenuation of radio wave in citrus orchards was analyzed based on continuous radio waves in the circumstance of different combinations of impact factors including plant depths,antenna heights,communication distances etc.Additionally,a WSN RF signal strength linear model objectively feasible in citrus orchards was built,with the related determination coefficients for fitting-curves ranging from 0.797 to 0.980,in order to ensure the possibility of predicting the tendency of receive signal strength attenuation with the existence of two factors,RF propagation distance and environmental propagation factor.As a consequence,a distributive chart of the best antenna height indicating the combination of different plant depths,antenna heights and communication distance variations was obtained,possibly providing good guidance for WSN system configuration and node deployment in citrus orchards.

关 键 词：无线传感器网络 射频信号 信号分析 橘园 

分 类 号：S126[农业科学—农业基础科学]