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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

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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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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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Sensory Functions of the Skin01:16

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The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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Related Experiment Video

Updated: Aug 12, 2025

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A Dual-Responsive Artificial Skin for Tactile and Touchless Interfaces.

Hai Lu Wang1, Tianyu Chen1, Bojian Zhang1

  • 1School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.

Small (Weinheim an Der Bergstrasse, Germany)
|January 26, 2023
PubMed
Summary

This study introduces a novel dual-responsive artificial skin capable of sensing both touch and proximity. This advanced sensor technology enables touchless material classification and enhanced human-machine interactions for next-generation electronics.

Keywords:
artificial skinshuman-machine interfacesmaterial classificationstactile perceptionstouchless sensing

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Area of Science:

  • Materials Science
  • Robotics
  • Human-Computer Interaction

Background:

  • Intelligent interactions and augmented reality demand advanced artificial skins beyond single-function tactile sensing.
  • Existing dual-responsive sensors have limited capabilities, primarily for proximity detection or simple switches.
  • There is a need for sensors that can convey richer information from environmental proximity inputs.

Purpose of the Study:

  • To develop a flexible iontronic dual-responsive artificial skin.
  • To enable the artificial skin to sense both applied pressure and approaching objects.
  • To demonstrate the artificial skin's ability to classify material categories through proximal inputs.

Main Methods:

  • Fabrication of a flexible iontronic dual-responsive artificial skin.
  • Integration of sensors capable of detecting both tactile pressure and pre-contact proximity events.
  • Development of algorithms to interpret proximal inputs for material classification.

Main Results:

  • The artificial skin accurately detects applied pressure and proximity.
  • Demonstrated versatile applications in dual-mode human-machine interfaces (virtual games, map navigation, document scrolling).
  • Achieved accurate, touchless classification of three material types (metals, polymers, human skin).

Conclusions:

  • The developed artificial skin offers enhanced perception dimensions by integrating tactile and proximity sensing.
  • The technology enables advanced human-machine interfaces and touchless material identification.
  • This dual-responsive artificial skin shows significant promise for future smart engineered electronics.