低功耗绿地墒情监测WSN节点

摘要

A design of green space moisture monitoring nodes was described and implemented,the node was based on ZigBee wireless sensor network technology. It adopted modular design, the wireless RF module and the data processing module were separated , it can effectively improve the reliability of the hardware node. Two hardware modules were placed on the board of the sensor, the sensor board with eight soil moisture channels and eight temperature sensor channels that can work with time-on function, Thus it reduced the overall power consumption of the sensor circuit,so that the node can run up for three months time on no people probation case. The average current in working state of the node is 52. 89 mA ,and the average sleep current of the node is 10 μA, it is about 30% power savings than similar products%设计了一种基于ZigBee无线传感器网络(WSN)技术的绿地墒情监测节点.为了提高节点硬件的可靠性及降低传感器电路的总体功耗,创新性地采用了模块化设计,将无线射频模块和数据处理模块分离,使其通过不同接口与传感器底板连接;传感器底板可接入8路土壤湿度传感器和8路温度传感器,并具备分时开启功能,节点可以在长达3个月的时间内运行于无人监守的环境中.测试结果显示该节点实际工作状态下的平均电流为52.89 mA,睡眠时的平均电流为10 μA,比同类产品节省功耗30％左右,可以用于构建监测绿地墒情的低功耗无线传感器网络.