基于人体运动的磁力互动能量回收电池系统

Magnetic Interactive Energy Recycling Battery System Based on Human Motion

压电振动能量收集器又被称为压电俘能器,传统的压电俘能器无法适用于低频率、多方向振动能量的回收。为打破传统压电俘能器的应用局限性,提出了一种能够收集多方向能量的环形十字式压电俘能器设计方案。根据压电晶体的特征参数选择PZT5H4E作为压电晶体,利用Solidworks对环形十字式结构进行设计,并对不同悬臂梁进行共振频率分析,选取能量转换效率更高的悬臂梁结构。仿真结果表明:将此压电俘能器固定在人的脚踝处,在人体运动激振频率下,最大输出电压约316.52 mV。

The piezoelectric vibration energy collector is also called piezoelectric energy harvester.The traditional piezoelectric energy harvester is not suitable for the recovery of low-frequency and multi-directional vibration energy.In order to break the ap‐plication limitations of traditional piezoelectric energy harvesters,a design scheme of a ring-cross piezoelectric energy harvester capable of collecting multi-directional energy is proposed.According to the characteristic parameters of the piezoelectric crystal,PZT5H4E is selected as the piezoelectric crystal.The ring-cross structure is designed by Solidworks,and the resonance frequency of different cantilever beams is analyzed.The cantilever beam structure with higher energy conversion efficiency is selected.The simulation results show that the maximum output voltage is about 316.52mV under the excitation frequency of human motion when the piezoelectric energy harvester is fixed at the ankle.