Flexible Anisotropic Magnetic Micropillar Arrays for Precision Directional Recognition in Human–Machine Interactions

Abstract

Flexible electronic skin, designed to mimic the tactile properties of human skin, holds significant potential in various applications, including healthcare monitoring, prosthetics, virtual and augmented reality, and soft robotics. While current research primarily focuses on strain and pressure sensing, the construction of artificial electronic skin capable of sliding touch sensing remains a significant challenge. In this study, we present an approach using magnetic micropillar arrays with anisotropic magnetization distributions for self-powered, multifunctional human–machine interactions. The system comprises two key components: an array of magnetic micropillars with precisely programmed magnetization directions and conductive coils that generate induced electromotive forces in response to changes in the external magnetic field. Based on Faraday’s law of induction, the magnetic anisotropy within the array enables the system to produce distinct voltage signals in response to directional mechanical stimulation, effectively addressing the challenge of recognizing sliding touch direction in flexible electronics. As a result, this system achieves high efficiency, accuracy, and reliability in direction recognition, encrypted communication, and remote control. This approach opens an alternative avenue for the development of sliding tactile sensors, advancing their applications in multifunctional human–machine interaction systems.