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Toward Battery-Free Wearable Devices: The Synergy between Two Feet by Qianyi Huang; Yan Mei; Wei Wang; Qian Zhang is a Computer Science article available to read on EtoBox.

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Recent years have witnessed the prevalence of wearable devices. Wearable devices are intelligent and multifunctional, but they rely heavily on batteries. This greatly limits their application scope, where replacement of battery or recharging is challenging or inconvenient. We note that wearable devices have the opportunity to harvest energy from human motion, as they are worn by the users as long as being functioning. In this article, we propose a battery-free sensing platform for wearable devices in the form factor of shoes. It harvests the kinetic energy from walking or running to supply devices with power for sensing, processing, and wireless communication, covering all the functionalities of commercial wearable devices. We achieve this goal by enabling the whole system running on the harvested energy from two feet. Each foot performs separate tasks and two feet are coordinated by ambient backscatter communication. We instantiate this idea by building a prototype, containing energy harvesting insoles, power management circuits, and ambient backscatter module. Evaluation results demonstrate that the system can wake up shortly after several seconds’ walk and have sufficient Blueto

Who reads Toward Battery-Free Wearable Devices: The Synergy between Two Feet?

Author

Qianyi Huang; Yan Mei; Wei Wang; Qian Zhang

Publisher

Association for Computing Machinery; Association for Computing Machinery (ACM) (ISSN 2378-962X)

Published

2018

Language

EN

Field

Computer Science (Physical Sciences)