Safeguarding Humans From Indoor Wireless Powering via Radar Detection

Ensuring the safety of electromagnetic exposure stands as an important concern in wireless power transfer (WPT) systems. This work proposes a distributed Fusion Radar WPT (FRWPT) system designed to maintain safe Electric Field Amplitude (EFA) levels at specific locations detected by the radar, prima...

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Bibliographic Details
Published in:IEEE journal of electromagnetics, RF and microwaves in medicine and biology RF and microwaves in medicine and biology, 2024-08, p.1-8
Main Authors: Mehrjouseresht, Pouya, Babarinde, Oluwatosin J., Volski, Vladimir, Svezhentsev, Alexander Ye, Schreurs, Dominique M. M.-P.
Format: Article
Language:English
Subjects:
Electromagnetic exposure
Estimation
indoor electric field amplitude
Layout
Radar
Radar detection
Safety
Transmitters
Wireless communication
wireless power transfer
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Summary:Ensuring the safety of electromagnetic exposure stands as an important concern in wireless power transfer (WPT) systems. This work proposes a distributed Fusion Radar WPT (FRWPT) system designed to maintain safe Electric Field Amplitude (EFA) levels at specific locations detected by the radar, primarily where an individual is present. This approach allows for higher EFA in areas without the person, thus optimizing overall power utilization within the system. Also, the radar's ability to detect a person's velocity allows for projecting the person's upcoming location to ensure safety in advance. We introduce an algorithm including power weighting factors for controlling power to not only mitigate dangerous radiation but also maximize power utilization. One significant challenge is the estimation of EFA considering multipath propagation, a common issue in indoor environments. To overcome this, we explore the indoor EFA distribution and suggest a simulation-based method for EFA estimation, taking into account the amplifying effect of the human body on EFA. Experimental results demonstrate that the system successfully maintains EFA below a predefined threshold across various human locations. Moreover, these experiments highlight the system's capability to maximize power utilization ratio (PUR), achieving a value exceeding 50%.
ISSN:2469-7249
2469-7257
DOI:10.1109/JERM.2024.3447469