A negative-work knee energy harvester based on homo-phase transfer for wearable monitoring devices

Hexiang Zhang; Hao Wang; Zutao Zhang; Yajia Pan; Xiao Luo

doi:10.1016/j.isci.2023.107011

A negative-work knee energy harvester based on homo-phase transfer for wearable monitoring devices

iScience. 2023 Jun 5;26(7):107011. doi: 10.1016/j.isci.2023.107011. eCollection 2023 Jul 21.

Authors

Hexiang Zhang^{1

2}, Hao Wang^{1

2}, Zutao Zhang^{1

2}, Yajia Pan¹, Xiao Luo²

Affiliations

¹ School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, P.R. China.
² Yibin Research Institute, Southwest Jiaotong University, Yibin 644000, P.R. China.

Abstract

Wearable health monitoring devices can effectively capture human body information and are widely used in health monitoring, but battery life is an important bottleneck in its development. A full negative-work energy harvester based on the homo-phase transfer mechanism by analyzing human motion characteristics was proposed in this paper. The system was designed based on the homo-phase transfer mechanism, including a motion input module, gear acceleration module, energy conversion module, and electric energy storage module. The output performance in three human-level, downhill, and running states was tested, respectively. Finally, we have evaluated the feasibility of an energy harvester powering wearable health monitoring devices, and the harvester can generate 17.40 J/day power, which can satisfy the normal operation of a typical health monitoring device. This study has certain promoting significance for the development of a new generation of human health monitoring.

Keywords: Applied sciences; Energy systems; Health information management.