PVDF Composite Fibers for Wireless Fall-Alert Detection

Abstract

As the demand for healthcare devices continues to rise, novel technologies centered around personalized motion monitoring systems are surfacing, wherein wearable sensors play a pivotal role. In the present investigation, an innovative wireless apparatus for detecting falls has been introduced, which encompasses a specifically engineered pressure sensor constituted of poly vinylidene fluoride (PVDF) composite fibers. Our design consists of high β-phase content of electrospun composites including 0.1 wt% of zinc oxide/reduced graphene oxide (ZnO/rGO) hybrid (mass ratio 90/10) which shows enhanced electrical voltage of 11.36 ± 0.72 V compared to pristine PVDF fiber. This piezoelectric pressure sensor is integrated with a wireless embedded system capable of transmitting an “SOS” message to a mobile phone upon fall experience of the user. Such wearable fall alert detection system with improved characteristics could benefit elderly and patients needing continuous monitoring for possible falls.