摘要
针对传统无线传感器网络节点供电电池存在更换困难、易造成环境污染等问题,提出了一种基于风能收集的自供电无线传感器网络节点设计方案。设计了一种压电式风能收集器来收集环境中的风能,为无线传感器网络节点供电。基于并联同步开关电感电路和稳压芯片MAX1672,设计了以超级电容为储能元件的能量管理电路,解决了风能收集器无法直接给节点供电的问题。以CC2530和SHT20为核心,设计并制作了具备温湿度监测功能的无线传感器网络节点。实验表明,风能收集器的启动风速为3 m/s,最佳负载为30 kΩ,最大输出功率为220 uW,在90 s的数据发送周期下,节点能够正常工作。
Aiming at the problems of battery replacing difficulty and possible environmental pollution for traditional wireless sensor network node power supply,a self-powered wireless sensor network node design scheme based on wind energy harvesting was proposed.A piezoelectric wind energy harvester is designed to harvest the wind energy for powering the wireless sensor network nodes.Based on the parallel synchronous switch inductor circuit and voltage regulator chip MAX1672,an energy managing circuit with a supercapacitor as the energy storage element is designed.It solves the problem that the wind energy harvester cannot directly supply power to the node.With cores consist of CC2530 and SHT20,a wireless sensor network node with temperature and humidity monitoring function is manufactured.The experimental results show that the starting wind speed of the wind energy harvesteris 3 m/s.The optimal electric load is 30 kΩ.The maximum output power is 220 uW.The node can work normally under a 90 s data transmission cycle.
作者
黎水平
程家豪
LI Shuipin;CHENG Jiahao(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China)
关键词
风能收集
无线传感器网络节点
自供电
能量管理电路
wind energy harvesting
wireless sensor network node
self-powered
energy management circuit
