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

HU JiaJun ¹QIAN Shuo ²WU Hui ¹HU DongXu ¹NIU LiXin ¹BI XiaoXue ¹ZHANG Jie ¹HOU XiaoJuan ¹GENG WenPing ¹MU JiLiang ¹HE Jian ¹CHOU XiuJian¹

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作者信息

1. Science and Technology on Electronic Test and Measurement Laboratory,North University of China,Taiyuan 030051,China
2. School of Software,North University of China,Taiyuan 030051,China
折叠

Abstract

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.

Key words

electromagnetic energy harvester/rope-shaft coupling structure/human motion/ultra-low frequency

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基金项目

National Natural Science Foundation of China(62171414)

National Natural Science Foundation of China(U2341210)

National Natural Science Foundation of China(52175554)

National Natural Science Foundation of China(52205608)

Fundamental Research Program of Shanxi Province(20210302123059)

Fundamental Research Program of Shanxi Province(20210302124610)

Hebei Province Central Guiding Local Science and Technology Development Fund Project(236Z4901G)

National Defense Fundamental Research Project()

出版年

2024

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

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