基于780 MHz频段的农田信息采集无线传感器网络设计  

Design of wireless sensor network for field information acquisition based on 780 MHz

作　　者：郑宝周[1] 李富强[1] 吴莉莉[1] 袁帅[2] 林爱英[1] 滕红丽[1] 豆根生[1] 袁超[1] ZHENG Baozhou LI Fuqiang WU Lili YUAN Shuai LIN Aiying TENG Hongli DOU Gensheng YUAN Chao(College of Sciences, Henan Agricultural University, Zhengzhou 450002, China College of Mechanical and Electrical Engineering, Sichuan Agricultural University, Ya＇ an 625014, China)

机构地区：[1]河南农业大学理学院,河南郑州450002 [2]四川农业大学机电学院,四川雅安625014

出　　处：《河南农业大学学报》2017年第1期60-65,共6页Journal of Henan Agricultural University

基　　金：河南省科技攻关项目(162102110108);河南省高等学校重点科研项目(15A510028;16B413002);河南农业大学科技创新基金项目(KJCX2015A17)

摘　　要：基于MSP430F5438A单片机和AT86RF212射频芯片设计了一种工作在780 MHz中国专用频段且符合IEEE802.15.4c标准的无线传感器网络。介绍了无线传感器节点结构及传感器节点无线通信电路的设计,并给出了空气温湿度、土壤温湿度及光照度传感器的选型和指标参数。选取豫东平原一块麦田作为试验环境,在小麦的拔节期和抽穗期,对工作于780 MHz、433 MHz和2.4 GHz频段的3种无线传感器网络节点进行试验,给出了3种节点的平均丢包率曲线和接收信号强度值随通信距离变化曲线。试验结果表明,在小麦不同生长期,780MHz和433 MHz频段的无线传感器网络的通信质量和传输性能明显优于2.4 GHz的无线网络,而且780 MHz网络的通信质量表现更佳,完全能够满足农田间数据的可靠传输。A new type of wireless sensor network was developed with chips of MSP430F5438 A and AT86RF212 which works on a Chinese dedicated band of 780 MHz and is compatible with the standard of IEEE802. 15. 4c for field information acquisition. This paper briefly described the structure of wireless sensor network node,mainly introducing the hardware design of a 780 MHz wireless sensor network. The choice and index parameters of sensor for soil moisture / temperature,air moisture / temperature and illuminance were listed. The paper also tested and analyzed the received signal strength index（ RSSI） and the average packet loss rate（ PLR） of the wireless sensor network node in 433 MHz,780 MHz,and 2. 4 GHz bands by changing the wireless communication distance in a wheat field of eastern Henan plain as the experiment-al environment. The experimental results showed that the transmission characteristics of the wireless sensor networks in the 433 MHz and 780 MHz bands were obviously better than the WSN of a 2. 4GHz band in the application of field environmental monitoring. The 780 MHz band WSN was even superior as to transmission and communication quality performance,and couldmeet the demand of field information reliable transmission.

关 键 词：农田信息采集 无线传感器网络 780 MHz频段 接收信号强度 

分 类 号：TP212.6[自动化与计算机技术—检测技术与自动化装置]