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| 农田环境中短程无线电传播性能试验 | |
| 引用本文： | 刘卉,汪懋华,孟志军,张漫,李海霞. 农田环境中短程无线电传播性能试验[J]. 江苏大学学报(自然科学版), 2010, 31(1). DOI: 10.3969/j.issn.1671-7775.2010.01.001 |
| 作者姓名： | 刘卉 汪懋华 孟志军 张漫 李海霞 |
| 作者单位： | 1. 首都师范大学,信息工程学院,北京,100048 2. 中国农业大学,现代精细农业系统集成研究教育部重点实验室,北京,100083 3. 国家农业信息化工程技术研究中心,北京,100097 |
| 基金项目： | “863”国家高技术研究发展计划项目(2006AA10Z216);;北京市自然科学基金资助项目(4072011);;国家“十一五”科技支撑计划课题(2008BAB38B06,2009BADA1B01) |
| 摘 要： | 为了研究农田环境中传感器节点短程无线电传播性能,选择冬小麦苗期、拔节期和抽穗期3个典型生育期,进行无线电传播路径损耗试验,通过测量不同天线高度、不同传输距离处的接收信号强度指示(RSSI),研究农田作物障碍对无线电传播衰减的影响.试验结果表明:3个生育期中2.4GHz无线电信号在6个天线高度条件下的路径损耗均符合对数距离路径损耗模型,平均路径损耗指数分别为1.96,2.13和2.42.作物植株高度和冠层密度可以作为农田环境动态变化下影响无线电传播的重要特征参数,与无线电的路径损耗指数之间具有明确的相关关系. |
| 关 键 词： | 无线传感器网络 精细农业 无线电传播 路径损耗 |
Performance assessment of short-range radio propagation in crop fields |
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| Liu Hui,Wang Maohua,Meng Zhijun,Zhang Man,Li Haixia. Performance assessment of short-range radio propagation in crop fields[J]. Journal of Jiangsu University:Natural Science Edition, 2010, 31(1). DOI: 10.3969/j.issn.1671-7775.2010.01.001 | |
| Authors: | Liu Hui Wang Maohua Meng Zhijun Zhang Man Li Haixia |
| Affiliation: | 1.Information Engineering College/a>;Capital Normal University/a>;Beijing 100048/a>;China/a>;2.Key Lab on Precision Agriculture System Integration Research/a>;China Agricultural University/a>;Beijing 100083/a>;3.National Engineering Research Center for Information Techno-logy in Agriculture/a>;Beijing 100097/a>;China |
| Abstract: | In order to evaluate the performance of short-range radio propagation in crop fields,testing of path loss was performed to determine RSSI levels at different heights and distances in wheat seedling stage,booting stage and jointing stage.The results showed that pass loss of radio propagation over a 2.4 GHz frequency band at each height could be described by the log-distance path loss model.Average path loss indexes in three different stages were 1.96,2.13 and 2.42 respectively.In addition,two factors of crop... |
| Keywords: | wireless sensor networks precision agriculture radio propagation path loss |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |