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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Design Example: Resistive Touchscreen01:14

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A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
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BioIn-Tacto: A compliant multi-modal tactile sensing module for robotic tasks.

Thiago Eustaquio Alves de Oliveira1, Vinicius Prado da Fonseca2

  • 1Department of Computer Science, Faculty of Science and Environmental Studies, Lakehead University, Canada.

Hardwarex
|October 11, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces an open-source, 3D-printable tactile sensing module for robots. This accessible design allows end-effectors to detect pressure and vibration, enhancing robotic interaction capabilities.

Keywords:
Compliant sensing moduleData fusionHapticsMultimodal bio-inspired sensingRobot interactionTactile sensingTouch perception

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Area of Science:

  • Robotics
  • Materials Science
  • Sensor Technology

Background:

  • Robotic end-effectors require advanced tactile sensing for complex manipulation tasks.
  • Existing tactile sensors can be expensive, difficult to fabricate, or lack multimodal capabilities.

Purpose of the Study:

  • To present an open-source, compliant multimodal tactile sensing module design.
  • To enable robotic end-effectors to sense pressure, vibration, and deformation.
  • To provide an accessible fabrication process using 3D printing.

Main Methods:

  • Developed a compliant tactile sensing module using 3D printed molds and a vacuum chamber.
  • Integrated off-the-shelf Microelectromechanical (MEMs) barometers and Magnetic, Angular Rate and Gravity (MARG) systems.
  • Released all hardware Computer-Aided Design (CAD) files and software source codes, including Robot Operating System (ROS) packages.

Main Results:

  • Fabrication process is accessible, allowing for production batches of up to five modules.
  • The module can sense contact properties like pressure and vibration.
  • The system estimates deformation using a quaternion representation.

Conclusions:

  • The developed tactile sensing module is easily assembled, modified, and deployed.
  • The open-source nature and accessible fabrication promote wider adoption in robotics.
  • The design allows for sensor component customization based on application needs.