An In-Shoe Harvester With Motion Magnification for Scavenging Energy From Human Foot Strike

被引:63
|
作者
Xie, Longhan [1 ]
Cai, Mingjing [1 ]
机构
[1] S China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510460, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
Energy harvesting; foot strike; magnetic; GENERATING ELECTRICITY; WALKING;
D O I
10.1109/TMECH.2015.2428618
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
The aim of this study was to develop an in-shoe magnetic harvester that could be embedded in a shoe to scavenge mechanical energy from human foot strike for conversion into electricity, thereby serving as a sustainable power source for portable or wearable electronic devices. The allowed displacement of the shoe heel in the vertical direction was extremely small; therefore, a special trapezoidal slider mechanism was employed to amplify the displacement of a footstep. To compensate for the low-frequency foot strike, a gear train was used to accelerate the motion that finally drove a microgenerator to produce electricity. Two sets of springs were employed to provide a restoring force for the trapezoidal slider mechanism that enabled the harvester to generate electricity during the return trip. The in-shoe harvester could be embedded in a shoe heel such that the human foot step was not hindered during activity. Experiments indicated that the harvester could generate an average power output of approximately 1 W during normal walking. Compared to harvesters from previous studies, the harvester in this study can generate a higher power output.
引用
收藏
页码:3264 / 3268
页数:5
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