This work addresses the electromagnetic field (EMF) safety of a capsule robot moving inside the human body during wireless power transfer (WPT) operations. The WPT system consists of an innovative birdcage coil capable of generating a nearly uniform rotating magnetic field with nonzero components along all three spatial axes. This solution is wearable, enabling comfortable and efficient power transfer to any patient. However, for obese human body models (HBMs), the current needed to transfer a reasonable power to the capsule battery could pose several EMF exposure risks due to the deeper colon tract and larger body cross-sections. A dosimetric analysis is therefore performed to assess compliance of the proposed WPT system with EMF safety standards. Different frequencies and HBMs are investigated to find the worst-case scenarios.
Dosimetric Assessment of a Birdcage-Coil Wireless Power Transfer at 6.78 MHz for Capsule Robots
De Santis, V.
;Olivieri, R.;Boumerdassi, W.;Campi, T.;Feliziani, M.
2026-01-01
Abstract
This work addresses the electromagnetic field (EMF) safety of a capsule robot moving inside the human body during wireless power transfer (WPT) operations. The WPT system consists of an innovative birdcage coil capable of generating a nearly uniform rotating magnetic field with nonzero components along all three spatial axes. This solution is wearable, enabling comfortable and efficient power transfer to any patient. However, for obese human body models (HBMs), the current needed to transfer a reasonable power to the capsule battery could pose several EMF exposure risks due to the deeper colon tract and larger body cross-sections. A dosimetric analysis is therefore performed to assess compliance of the proposed WPT system with EMF safety standards. Different frequencies and HBMs are investigated to find the worst-case scenarios.Pubblicazioni consigliate
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