Self-sustained Arbitrary Motion Sensing System for Wireless Autonomous Control Application

This work reports a high-performance and highly sensitive self-sustained arbitrary motion sensing system (SS-AMSS) by integrating energy harvesting and self-powered sensing on a novel 3D printed geometry. SS-AMSS consists of a spherical magnet rolling inside the hollow ellipsoid surrounded with six planar spiral coils for scavenging energy from multi-direction and four triboelectric nanogenerators (TENGs) are integrated for arbitrary motion detection. Unlike traditional TENGs that require external stimuli for periodic contact-separation, the custom fabricated PDMS/FeSiCr ferroelectric film acts as an actuating layer, thus simplifying the TENG operation. The electromagnetic generator can deliver a peak power of 187 mW at 275 Ω matching load under 6 Hz frequency. The self-powered sensors have excellent motion sensitivities for detecting various motion parameters along with linear (X, Y, and Z-axis) and rotational (pitch, roll, and yaw axis) conditions. Finally, the capability of SS-AMSS as a complete wireless self-powered motion sensing system has been demonstrated.