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

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Implementation of a Sponge-Based Flexible Electronic Skin for Safe Human-Robot Interaction.

Kun Yang^1,2, Xinkai Xia^1,3, Fan Zhang^1,3

¹Shanxi Key Laboratory of Micro Nano Sensor & Artificial Intelligence Perception, College of Information and Computer, Taiyuan University of Technology, Taiyuan 030024, China.

|August 26, 2022

Summary

This study introduces a new flexible sensor system for collaborative robots, using graphene-infused sponges to detect pressure. This electronic skin enhances safety by providing tactile feedback for secure human-robot interaction.

Keywords:

FDM 3D printing flexible sensor human–robot interaction tactile acquisition system

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Area of Science:

Robotics
Materials Science
Sensor Technology

Background:

Industrial robots are replacing manual labor, increasing efficiency but also operator accident risks.
Existing safety measures for human-robot collaboration require enhancement.
Need for advanced sensing to improve robot safety and interaction.

Purpose of the Study:

To design and develop a flexible sensor system to improve the safety of collaborative robots.
To create an electronic skin capable of accurately sensing pressure for human-robot interaction.
To enhance the security performance of robot arms in industrial settings.

Main Methods:

Fabrication of flexible sensors by adsorbing graphene into a sponge material.
Utilizing Ecoflex as a substrate for the sensor array on a robot arm.
Employing a 3D printing mold for precise sensor substrate preparation and array unity.
Developing a tactile acquisition system for data sampling from the sensor array.

Main Results:

The flexible sensors demonstrated accurate pressure-to-numerical signal conversion within a 0-5 N force range.
Stability and reproducibility experiments confirmed the sensors' reliable performance.
The developed electronic skin system successfully enabled tactile data acquisition.
Interaction experiments validated the system's effectiveness for secure human-robot interaction.

Conclusions:

The proposed flexible sensor system, or electronic skin, offers a viable solution for enhancing collaborative robot safety.
The sensor's ability to convert pressure into signals and its stability make it suitable for robot arm applications.
This technology provides an efficient approach for safer human-robot collaboration in industrial environments.