农田土壤监测无线传感器网络通信平台

Communication platform of wireless sensor network for farmland soil monitoring

为实现田间土壤信息的持续获取,延长田间无线传感器网络的生存时间,对农田土壤监测无线传感器网络通信平台做了研究。重点研究了无线传感器网络节点的软硬件结构和低功耗实现方式。节点硬件系统采用支持低功耗睡眠模式的高性能单片机ATmega128L和低功耗射频芯片CC1000设计完成;通信协议在洪泛通信算法的基础上,加入了数据包登记机制和网络梯度控制,并且支持全网同步的周期性睡眠。结果表明:传感器网络节点软硬件结构简单、实用;经过通信协议改进和加入新休眠机制后,在网络层上实现了传感器网络节点的同步,功耗降低最大达80%,满足了农田土壤监测的需求。

To reach the goal of sustainable farmland data acquisition and longer living of field wireless sensor network,Data Acquisition Platform for Farmland Soil Monitoring is studied,which mainly focus on node structure of software and hardware,realization way of node low power.Hardware system is composed of high-performance,sleep mode supported MCU ATmega128L and low-power consumption RF IC CC1000;a routing algorithm added packet recording and network graded control is introduced based on the flooding routing,based on which Synchronous and periodic network dormancy can be resolved.Results show that node structure of software and hardware is simple and practical.With the improved communication protocols and the new dormancy mechanism,time-synchronization is achieved in network layer,with power consumption reducing maximally 80%.The system meets the demands of farmland monitoring to a certain extend.