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Sensing body motions based on charges generated on the body

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Author list: ZHANG R, ZHANG R, BALLIU E, OLIN H, ANDERSSON H, ÖRTEGREN J, ENGHOLM M, HUMMELGÅRD M, HUMMELGÅRD M, OLSEN M, BLOMQUIST N
Publication year: 2019
ISSN: 2211-2855
View additional information: View in Web of Science™

Abstract
The sensing of body motions is of great importance in areas such as healthcare, rehabilitation, and human-computer interactions. Different methods have been developed based on visual or electrical signals. However, such signals are acquired by external devices and are not intrinsic signals that are created on the body. Here, we report a new universal body motion sensor (UBS) to detect motions based on the intrinsic contact electrification (CE) of the skin or electrical induction (EI) of the body. The CE or EI generates charges on the body, leading to potential differences between the body and ground that can be measured to identify different body motions, such as motions of the head, arms, fingers, waist, legs, feet and toes. Proof-of-concept experiments have demonstrated that the UBS can be used to monitor the conditions of people with Parkinsons disease (PD) and to quantitatively monitor the recovery of those with a leg injury, suggesting great potential for healthcare applications.


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