Por favor, use este identificador para citar o enlazar este Item:http://hdl.handle.net/20.500.12105/11649
Título
Modelling the Influence of Electromagnetic Field on the User of a Wearable IoT Device Used in a WSN for Monitoring and Reducing Hazards in the Work Environment.
Autor(es)
Fecha de publicación
2020-12-12
Cita
Sensors (Basel) . 2020 Dec 12;20(24):7131.
Idioma
Inglés
Tipo de documento
research article
Resumen
The aim of this study was to evaluate the absorption in a user's head of an electromagnetic field (EMF) emitted by the Wi-Fi and/or Bluetooth module of a wearable small Internet of Things (IoT) electronic device (emitting EMF of up to 100 mW), in order to test the hypothesis that EMF has an insignificant influence on humans, and to compare the levels of such EMF absorption in various scenarios when using this device. The modelled EMF source was a meandered inverted-F antenna (MIFA)-type antenna of the ESP32-WROOM-32 radio module used in wearable devices developed within the reported study. To quantify the EMF absorption, the specific energy absorption rate (SAR) values were calculated in a multi-layer ellipsoidal model of the human head (involving skin, fat, skull bones and brain layers). The obtained results show up to 10 times higher values of SAR from the MIFA located in the headband, in comparison to its location on the helmet. Only wearable IoT devices (similar in construction and way of use to the investigated device) emitting at below 3 mW equivalent isotropically radiated power (EIRP) from Wi-Fi/Bluetooth communications modules may be considered environmentally insignificant EMF sources.
Palabras clave
Internet of Things (IoT) | Biomedical engineering | Environmental engineering | Numerical simulations; occupational exposure | Public health | Radiofrequency sensor | Specific energy absorption rate (SAR) | Wearables | Wireless sensor network (WSN)
Versión en línea
DOI
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