李萍萍,彭玉礼,王纪章.温室青椒中2.4 GHz无线电波传播特性研究[J].农业机械学报,2014,45(2):251-255.
Li Pingping,Peng Yuli,Wang Jizhang.Propagation Characteristics of 2.4 GHz Radio Wave in Greenhouse of Green Peppers[J].Transactions of the Chinese Society for Agricultural Machinery,2014,45(2):251-255.
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温室青椒中2.4 GHz无线电波传播特性研究   [下载全文]
Propagation Characteristics of 2.4 GHz Radio Wave in Greenhouse of Green Peppers   [Download Pdf][in English]
投稿时间:2013-03-05  
DOI:10.6041/j.issn.1000-1298.2014.02.042
中文关键词:  温室 青椒 无线传感器网络 无线电波 路径衰减
基金项目:科技型中小企业技术创新基金资助项目(11C26213204549)、江苏省农业科技支撑计划资助项目(BE2010347)、江苏省产学研联合创新资金资助项目(BY2013065-07)和江苏高校优势学科建设工程资助项目
作者单位
李萍萍 江苏大学,南京林业大学 
彭玉礼 江苏大学 
王纪章 江苏大学 
中文摘要:为解决温室中无线传感器网络的规划和部署问题,探讨作物对无线电波传播特性的影响,研究了种植青椒的温室中2.4 GHz无线信号在不同方向和高度下的传播特性。通过试验实地测量了3个方向和2个高度下接收信号强度和丢包个数,并通过Matlab对试验数据进行回归分析。结果表明:不同方向和高度下,青椒中无线信道传播特性符合对数路径衰减模型,拟合相关系数在0.900 7和0.947 3之间;传感器节点在青椒中的不同高度决定着青椒中2.4 GHz无线电波的传播特性,对无线信道传播特性的影响较为显著,而传播方向对青椒中无线信号的影响较弱。同时得到了青椒中传感器节点最宜部署在青椒冠层及以上位置,为无线传感器网络在种植青椒的温室中的节点部署提供了技术支持。
Li Pingping  Peng Yuli  Wang Jizhang
Jiangsu University,Nanjing Forestry University;Jiangsu University;Jiangsu University
Key Words:Greenhouse Green pepper Wireless sensor networks Radio wave Path loss
Abstract:In order to configure wireless sensor networks system and node deployment in greenhouse, this paper researched propagation characteristics of 2.4 GHz wireless channel at different directions and heights in greenhouse of green peppers. Received signal strength and packet loss numbers were investigated by field testing measurements at three directions and two heights. Regression analysis results showed that the radio channel propagation characteristics in different directions and heights of green peppers accorded with logarithm distance path loss model, and the fitting correlation coefficients between computational values and measurement values were between 0.900 7 and 0.947 3. Different heights of sensor nodes in the green peppers determined the radio wave propagation characteristics. Besides, validation results showed that it was the best to deploy the sensor nodes antennas at the top of green peppers canopy or above of it in greenhouse. This research can provide technical support for WSN application in greenhouse.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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