一种无线传感节点风能自供电系统的设计

Design of Wind Energy Harvesting System for Wireless Sensor Nodes

无线传感器网络凭借其体积小、布局灵活、可靠性强等优势,得到了日益深入的研究及应用,但是节点的工作寿命严重依赖供电电池的持续时间.为实现网络节点工作的持久性,研究了微型风力发电机供电的无线传感节点的设计,采用超低功耗电源管理电路,结合相应的MPPT算法(Maximum Power Point Tracking)实现风力发电机在变化风速下的最大功率点跟踪,并维持无线传感节点的稳定运行.实验结果表明,通过本电源管理电路及MPPT算法,风能采集单元对电机输出电能的转换效率提高到了75%,所采集能量提高为改进前的三倍,本设计可使无线传感节点依靠风能独立运行,具有一定的应用前景.

Wireless sensor network has got increasingly in-depth study and application by virtue of its small size, flexible layout, strong reliability and other advantages, while the node working lifespan is heavily dependent on the running time of power supply battery. The author studies the design of wireless sensor node powered by a miniature wind energy generator, using an ultra-low-power-management circuit in order to realize the network node working persistence, and combines with MPVF algorithm to track and maintain maximum output power from the wind turbine generator to sustain the wireless sensor node operating over a wide range of operating conditions. The experimental results show that through the ultra-low-power-management circuit and MPPT algorithm, wind energy collecting unit power conversion efficiency is increased to 75%, and the harvested power increases by three times than before. The design can run the wireless sensor node independently by wind power and has application prospect.