Overview of Human Walking Induced Energy Harvesting Technologies and Its Possibility for Walking Robotics

Hu Shi, Zhaoying Liu and Xuesong Mei
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Hu Shi: School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
Zhaoying Liu: School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
Xuesong Mei: School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China

Energies, 2019, vol. 13, issue 1, 1-22

Abstract: This study is mainly to provide an overview of human walking induced energy harvest. Focusing on the proportion of all energy sources provided by daily activity, the available human walking induced energy is divided with respect to the generation principle. The extensive research on harvesting energy results from body vibration, inertial element, and foot press to convert into electricity is overviewed. Over the past decades, various smart materials have been employed to achieve energy conversion. Generators based on electromagnetic induction or the triboelectric effect were developed and integrated. Small captured power and low overall efficiency are criticized. The concept of human walking energy harvest is extended into the wearable walking robotics using other mediums, such as fluid, to transmit power instead of electricity. By comparison, it is indicated that less energy conversion links are involved in energy regeneration of such applications and expected to guarantee less loss and higher efficiency. Meanwhile, in order to overcome the shortage of relatively low power output, comments are made that the harvester should be capable of adaptation under the condition that the mechanical energy of lower limb and feet is subject to change in different gait phases so as to maximize the collected energy.

Keywords: biomedical mechanics; energy harvesting; energy storage; exoskeleton; gait; hydraulic system; accumulator (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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