Fig. 2: The working mechanism and signal characteristics.
From: Bionic e-skin with precise multi-directional droplet sliding sensing for enhanced robotic perception

a Schematic illustration of droplet sliding behavior monitoring. b Schematics of the working mechanism of DES. c, d Waveforms of voltage and current generated by droplets sliding on the DES surface. e, f Droplets sliding at different three positions on DES and the corresponding output signals.