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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.
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...
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Tactile and Chemical Senses01:27

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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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Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
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Piezoresistive Tactile Sensor Discriminating Multidirectional Forces.

Youngdo Jung1, Duck-Gyu Lee2, Jonghwa Park3

  • 1Department of Nature-Inspired Nanoconvergence System, Korea Institute of Machinery and Materials, Daejeon 34103, Korea. yjung@kimm.re.kr.

Sensors (Basel, Switzerland)
|October 8, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a novel flexible tactile sensor that mimics human skin to detect both the magnitude and direction of forces. This advancement is crucial for enhancing robotic and prosthetic applications by restoring tactile sensation.

Keywords:
carbon nanotubeinterlocking microdomemultidirectional detectionpiezoresistiveshear forcetactile sensor

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Area of Science:

  • Materials Science
  • Robotics
  • Biomedical Engineering

Background:

  • Human skin possesses advanced tactile sensing capabilities through mechanoreceptors.
  • Current prosthetic and robotic systems lack sophisticated tactile feedback.
  • There is a need for sensors that can detect both force magnitude and direction.

Purpose of the Study:

  • To develop a flexible tactile sensor inspired by human skin.
  • To enable simultaneous detection of normal pressure and shear force magnitude and direction.
  • To create a sensor for advanced human-interactive robots and prosthetics.

Main Methods:

  • Designed a piezoresistive tactile sensor with a flexible elastomer core and sidewall structures.
  • Embedded highly sensitive interlocking piezoresistive sensing elements.
  • Demonstrated simultaneous discrimination of normal pressure and shear force.

Main Results:

  • The sensor successfully discriminated normal pressure and shear force without interference.
  • Achieved detection limits of 128 Pa for normal pressure and 0.08 N for shear force.
  • The sensor operates without complex signal processing, mimicking biological systems.

Conclusions:

  • The developed tactile sensor effectively replicates human skin's ability to sense force magnitude and direction.
  • This technology holds significant potential for improving the functionality of prosthetic arms and bionic limbs.
  • The sensor's design offers a pathway for restoring nuanced tactile sensation in artificial systems.