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Open AccessArticle

Energy Harvesting Backpacks for Human Load Carriage: Modelling and Performance Evaluation

Shien-Ming Wu School of Intelligent Engineering, South China University of Technology, Guangzhou 511442, China
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Electronics 2020, 9(7), 1061; https://doi.org/10.3390/electronics9071061
Received: 4 June 2020 / Revised: 21 June 2020 / Accepted: 23 June 2020 / Published: 28 June 2020
(This article belongs to the Special Issue Energy Harvesting and Storage Applications)
In recent years, there has been an increasing demand for portable power sources as people are required to carry more equipment for occupational, military, or recreational purposes. The energy harvesting backpack that moves relative to the human body, could capture kinetic energy from human walking and convert vertical oscillation into the rotational motion of the generators to generate electricity. In our previous work, a light-weight tube-like energy harvester (TL harvester) and a traditional frequency-tuneable backpack-based energy harvester (FT harvester) were proposed. In this paper, we discuss the power generation performance of the two types of energy harvesters and the energy performance of human loaded walking, while carrying energy harvesting backpacks, based on two different spring-mass-damper models. Testing revealed that the electrical power in the experiments showed similar trends to the simulation results, but the calculated electrical power and the net metabolic power were higher than that of the experiments. Moreover, the total cost of harvesting (TCOH), defined as additional metabolic power in watt required to generate 1 W of electrical power, could be negative, which indicated that there is a chance to generate 6.11 W of electricity without increasing the metabolic cost while carrying energy harvesting backpacks.
Keywords: energy harvesting; suspended-load backpack; spring-mass-damper model; human motion energy harvesting; suspended-load backpack; spring-mass-damper model; human motion
MDPI and ACS Style

Huang, L.; Wang, R.; Yang, Z.; Xie, L. Energy Harvesting Backpacks for Human Load Carriage: Modelling and Performance Evaluation. Electronics 2020, 9, 1061.

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