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Related Experiment Video

Updated: Jul 9, 2025

Author Spotlight: Microfluidic Channel-Based Soft Electrodes and Their Application in Capacitive Pressure Sensing

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Published on: March 17, 2023

Skin-Inspired Capacitive Flexible Tactile Sensor with an Asymmetric Structure for Detecting Directional Shear Forces.

Haibo Yu^1,2, Hongji Guo^1,2, Jingang Wang^1,2,3

¹State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, 110016, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|December 7, 2023

Summary

This study introduces a novel flexible tactile sensor using asymmetric microhair structures. This sensor can detect the direction of shear forces, enhancing robotic tactile perception and manipulation capabilities.

Keywords:

asymmetric microhair array capacitive directional shear force flexible tactile sensor two-photon polymerization

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Area of Science:

Robotics
Materials Science
Sensor Technology

Background:

Flexible pressure sensors are crucial for robotic tactile perception.
Conventional sensors lack directional force sensing capabilities.

Purpose of the Study:

To design a capacitive flexible tactile sensor capable of perceiving directional shear force.
To mimic skin structures using asymmetric microhair arrays.

Main Methods:

Asymmetric microhair structures fabricated using two-photon polymerization (TPP) and replication.
Capacitive sensing mechanism to detect force-induced deformations.

Main Results:

The sensor successfully determines static and dynamic shear force directions.
Achieved a wide response range (30 Pa to 300 kPa).
Demonstrated high stability with <2.5% capacitive change after 5000 cycles.

Conclusions:

The developed sensor enhances robotic dexterity and intelligence.
Potential applications in advanced robotic manipulation and human-robot interaction.