首页|A high-performance electromagnetic energy harvester for scavenging ultra-low frequency vibration energy of human foot movement

A high-performance electromagnetic energy harvester for scavenging ultra-low frequency vibration energy of human foot movement

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In our daily lives,low-frequency kinetic energy primarily manifests as vibrations.However,effective harnessing of low-frequency kinetic energy remains a formidable challenge.This paper proposes a rope-driven rotor that rotates around an axis and consists of an ultra-high-molecular-weight polyethylene(UHMWPE)wire wrapped around a metal shaft.The rotor can convert ultra-low frequency vibration/linear motion into rapid rotation by pressing the top at low frequencies and driving the rope for a quick release.The harvester can generate up to 36.25 mW power using a 0.1-mm-diameter UHMWPE wire as the rotor when periodically pressed down to 20 mm at a frequency of 1 Hz.A simple power generation floor is assembled,generating 28.58-mW power with a matching load at a frequency of 1.5 Hz.Moreover,the harvester can increase the charging voltage of a 0.47-F supercapacitor from 0 to 6.8 V within 10 min.In addition,the harvester can harvest energy through a light finger press motion,and the energy obtained can also support the continuous operation of multiple electronic devices concurrently.This study introduces an effective method for harvesting ultra-low frequency energy and has great prospects in the field of power generation floor and human movement energy harvesting.

electromagnetic energy harvesterrope-shaft coupling structurehuman motionultra-low frequency

HU JiaJun、QIAN Shuo、WU Hui、HU DongXu、NIU LiXin、BI XiaoXue、ZHANG Jie、HOU XiaoJuan、GENG WenPing、MU JiLiang、HE Jian、CHOU XiuJian

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Science and Technology on Electronic Test and Measurement Laboratory,North University of China,Taiyuan 030051,China

School of Software,North University of China,Taiyuan 030051,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Program of Shanxi ProvinceFundamental Research Program of Shanxi ProvinceHebei Province Central Guiding Local Science and Technology Development Fund ProjectNational Defense Fundamental Research Project

62171414U234121052175554522056082021030212305920210302124610236Z4901G

2024

10.1007/s11431-023-2633-2

中国科学:技术科学(英文版)
中国科学院

中国科学:技术科学(英文版)

CSTPCDEI
影响因子：1.056
ISSN：1674-7321
年,卷(期)：2024.67(5)