A Triple-Mode Flexible E-Skin Sensor Interface for Multi-Purpose Wearable Applications
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Published on: October 27, 2023
Sung-Woo Kim1, Youngoh Lee2, Jonghwa Park3
1School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Korea. karic525@unist.ac.kr.
Abstract:
This study presents a flexible wireless electronic skin (e-skin) sensor system that includes a multi-functional sensor device, a triple-mode reconfigurable readout integrated circuit (ROIC), and a mobile monitoring interface. The e-skin device's multi-functionality is achieved by an interlocked micro-dome array structure that uses a polyvinylidene fluoride and reduced graphene oxide (PVDF/RGO) composite material that is inspired by the structure and functions of the human fingertip. For multi-functional implementation, the proposed triple-mode ROIC is reconfigured to support piezoelectric, piezoresistance, and pyroelectric interfaces through single-type e-skin sensor devices. A flexible system prototype was developed and experimentally verified to provide various wireless wearable sensing functions-including pulse wave, voice, chewing/swallowing, breathing, knee movements, and temperature-while their real-time sensed data are displayed on a smartphone.
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