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

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

机构地区：[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

出　　处：《Science China(Technological Sciences)》2024年第5期1391-1400,共10页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.62171414,U2341210,52175554,and 52205608);the Fundamental Research Program of Shanxi Province(Grant Nos.20210302123059,and 20210302124610);the Hebei Province Central Guiding Local Science and Technology Development Fund Project(Grant No.236Z4901G);the National Defense Fundamental Research Project。

摘　　要：In our daily lives,low-frequency kinetic energy primarily manifests as vibrations.However,effective harnessing of lowfrequency 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 m W 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-m W 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.

关 键 词：electromagnetic energy harvester rope-shaft coupling structure human motion ultra-low frequency 

分 类 号：TH69[机械工程—机械制造及自动化]