Fully enclosed bearing-structured self-powered rotation sensor based on electrification at rolling interfaces for multi-tasking motion measurement

Triboelectric effect is receiving increasingly extensive attentions as fueled by its recently explored novel applications. In this work, we utilize this effect to develop a fully enclosed bearing-structured self-powered rotation sensor (SPRS) for multi-tasking measurement. When conveniently applied on a rolling wheel, it can simultaneously monitor speed, acceleration, and travelled distance of a vehicle.200