Pyroelectrically Charged Flexible Ferroelectret-Based Tactile Sensor for Surface Texture Detection

Texture detection is one of the essential features requested for artificial tactile sensing to push demand flexible low-cost sensors in robotics sector. In this manuscript, we demonstrate ability a ferroelectret-based pressure sensor together with patterned elastomer layer detect surface textures. The ferroelectret was fabricated using fluorinated ethylene propylene (FEP) sheets bonded adhesive create cavities, integrated bumped surface, and finally charged pyroelectric method developed by our group. showed linear response applied force range 0.5 2 N, piezoelectric coefficient 150.1 ± 3.2 pC/N 10–80 Hz, flat dynamic 10–1000 Hz. characterization sensor, performed at different scanning speeds (10 30 mm/s) gratings periodicities (0 0.8 mm), that fundamental frequencies observed ranged from 12 Hz 75 as expected model. These results lay foundation adoption such applications need fine information, an autonomous or teleoperated robotic hand, prostheses, wearable devices.