Micromachines (Oct 2020)

Printed Soft Sensor with Passivation Layers for the Detection of Object Slippage by a Robotic Gripper

  • Reo Miura,
  • Tomohito Sekine,
  • Yi-Fei Wang,
  • Jinseo Hong,
  • Yushi Watanabe,
  • Keita Ito,
  • Yoshinori Shouji,
  • Yasunori Takeda,
  • Daisuke Kumaki,
  • Fabrice Domingues Dos Santos,
  • Atsushi Miyabo,
  • Shizuo Tokito

DOI
https://doi.org/10.3390/mi11100927
Journal volume & issue
Vol. 11, no. 10
p. 927

Abstract

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Tactile sensing, particularly the detection of object slippage, is required for skillful object handling by robotic grippers. The real-time measurement and identification of the dynamic shear forces that result from slippage events are crucial for slip detection and effective object interaction. In this study, a ferroelectric polymer-based printed soft sensor for object slippage detection was developed and fabricated by screen printing. The proposed sensor demonstrated a sensitivity of 8.2 μC·cm−2 and was responsive to shear forces applied in both the parallel and perpendicular directions. An amplifier circuit, based on a printed organic thin-film transistor, was applied and achieved a high sensitivity of 0.1 cm2/V·s. Therefore, this study experimentally demonstrates the effectiveness of the proposed printable high-sensitivity tactile sensor, which could serve as part of a wearable robotic e-skin. The sensor could facilitate the production of a system to detect and prevent the slippage of objects from robotic grippers.

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