POS5-0983
Magnetoelastic Hemispherical Tactile Skin with GMR Spin Valve Readout for In-Plane Contact Direction Sensing
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
minsun oh (Gwangju Institute of Science and Technology)
Co-Author(s)
Abstract
Tactile sensors are important for adaptive gripping, in-hand manipulation, and human–machine interaction in robotic systems. However, detecting multidirectional contact information requires dense sensor arrays, external visual feedback, or complex signal processing, which increases system complexity. Here, we present a magnetoelastic hemispherical tactile skin with giant magnetoresistance (GMR) spin-valve readout for in-plane contact direction sensing. The tactile skin uses Ecoflex-based magnetic hemispheres containing NdFeB particles and a modulus-gradient structure that enhances contact-induced in-plane deformation. Under external contact, the magnetic hemisphere mechanically reconfigures the local stray-field distribution, including its direction and polarity. GMR spin-valve sensors placed beneath the hemispheres detect these magnetic-field changes as distinct resistance responses. By coupling modulus-gradient-assisted magnetoelastic deformation with the angular and polarity-dependent response of GMR spin valves, the device enables directional tactile sensing using a compact sensing architecture. This strategy provides a practical route toward vision-free tactile direction sensing for robotic manipulation and human–machine interfaces.
