果园数据采集和监控的低功耗节点设计

Design of Data Collection and Monitoring Node with Low Energy Consumption Applied in Orchard

针对果园种植密度大、障碍物多使得通信受阻的缺点,设计了一种适合果园数据采集和监控的低成本、低功耗的传感器节点;节点的微控制器采用低功耗ATmega128L,射频模块采用CC2420,并采用SHT11空气温湿度传感器、ISL29010光照传感器、FDS-100土壤水分传感器、Pt1000土壤温度传感器作为传感器模块,对节点的软件进行了详细设计,改进了操作系统任务调度方法,通过引入休眠机制设计了MAC层和网络层通信协议;通过将文中节点应用于南通海安市的大公镇果园试验基地,结果表明:文中设计的节点在采样周期为1 050s时,能正常工作116天,具有低功耗和生命周期长的优点,同时其采样湿度的平均误差仅为0.213%,具有数据采集精度高的优点,能满足果园信息采集和监控的要求。

Aiming at the problem of big planting density and many obstructions, a node designed suitable for data acquisition and monitoring in orchard was introduced. The node is composed of micro controller unit ATmega128L, RF module CC2420, air temperature and humidity sensor SHT11, the light sensor ISL29010, the soil moisture sensor FDS 100 and the Pt1000 soil temperature sensor as the sensor module. The software of the node was also designed： the task scheduling method was improved and the MAC protocol and network protocol were also designed by adding the mechanism of dormancy. The experiment in the Dagongzhen Orchard in Nantong shows when the sampling period is 1050s the node can work 116 day with the advantages of low energy consumption and long life circle. The average error is only 0. 213% with the advantages of high data acquisition accuracy. The result shows the node in this paper can satisfy the demand of the orchard.