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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

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.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
Tactile and Chemical Senses01:27

Tactile and Chemical Senses

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. This...

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Related Experiment Video

Updated: Jul 13, 2026

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
07:32

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PVA/PANI-DBSA Nanomesh Tactile Sensor for Force Feedback.

Boyi Wang1,2,3, Rong Du1,2,3, Yi Liu1,2,3

  • 1School of Mechanical and Electrical Engineering, Wuhan University of Technology, Wuhan 430070, China.

Polymers
|June 19, 2024
PubMed
Summary

Researchers developed a novel piezoresistive tactile sensor using conductive nanofibers. This sensor offers a wide measuring range and fast response times, showing potential for advanced prosthetics.

Keywords:
PANI-DBSAelectrospinningnanomeshpiezoresistivetactile sensors

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Touch is crucial for human-environment interaction.
  • Piezoresistive tactile sensors are gaining attention for their ease of use and signal processing.
  • Developing advanced tactile sensors is key for improving human-machine interfaces.

Purpose of the Study:

  • To fabricate a novel piezoresistive tactile sensor with enhanced performance.
  • To investigate the sensing capabilities of conductive beads-on-string polyvinyl alcohol (PVA)/polyaniline doped with dodecyl benzene sulfonic acid (PANI-DBSA) nanofibers.
  • To evaluate the potential of this sensor for applications in active upper limb prostheses.

Main Methods:

  • Electrospinning technique was employed to fabricate PVA/PANI-DBSA nanofibers.
  • The nanostructure of the fabricated material was analyzed.
  • The piezoresistive properties, including measuring range, sensitivity, response time, and recovery time, were characterized.

Main Results:

  • A unique beads-on-string nanostructure of PVA-coated PANI-DBSA was successfully fabricated.
  • The tactile sensor demonstrated a wide measuring range from 12 Pa to 121 kPa.
  • The sensor exhibited high sensitivity (8.576 kPa⁻¹) within a specific pressure range (12 Pa–484 Pa) and rapid response/recovery times (approx. 500 ms).

Conclusions:

  • The developed PVA/PANI-DBSA nanofibers form a highly effective piezoresistive tactile sensor.
  • The sensor's wide measuring range, high sensitivity, and fast response make it suitable for tactile sensing applications.
  • This technology shows significant promise for integration into active upper limb prostheses, enhancing their functionality.