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Related Concept Videos

Tactile and Chemical Senses01:27

Tactile and Chemical Senses

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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

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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Somatosensation01:33

Somatosensation

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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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Sensory Functions of the Skin01:16

Sensory Functions of the Skin

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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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Related Experiment Video

Updated: Oct 30, 2025

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects
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Tactile Interaction Sensor with Millimeter Sensing Acuity.

Eunsuk Choi1, Sunjin Kim1, Jinsil Gong1

  • 1Department of Electronic Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea.

Sensors (Basel, Switzerland)
|July 2, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a compact tactile sensor capable of detecting pressure, distribution, and shear force direction. Its simple design ensures high reliability and uniformity for advanced robotics and human-computer interfaces.

Keywords:
digitized outputpressure sensorshear sensortactile sensor

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Area of Science:

  • Robotics and Human-Computer Interaction
  • Sensor Technology
  • Materials Science

Background:

  • Developing advanced tactile sensors is crucial for enhancing the capabilities of robotic systems and creating more intuitive human-computer interfaces.
  • Existing tactile sensors often face challenges with uniformity, reliability, and the ability to detect complex force parameters simultaneously.

Purpose of the Study:

  • To develop and characterize a novel, compact tactile interaction sensor.
  • To enable simultaneous detection of pressure level, pressure distribution, and shear force direction.
  • To demonstrate the sensor's potential for applications in robotics and remote input.

Main Methods:

  • The sensor utilizes a 3 × 3 mm array of mechanical switches beneath a conducting diaphragm.
  • External stimuli cause diaphragm deflection, activating specific switch arrangements to measure forces.
  • The system measures normal pressure, shear force direction, contact shape, and contact motion.

Main Results:

  • The sensor achieves high sensitivity, detecting forces as low as ~50 milligram-force (mgf).
  • It accurately determines shear force direction and distinguishes normal pressure during slip motion.
  • The sensor demonstrates reliable detection of contact shape and motion, with low noise and high uniformity.

Conclusions:

  • The developed tactile sensor offers a simple, robust, and highly uniform solution for multi-parameter force detection.
  • Its design, independent of active sensing materials, ensures high reliability for array-type integration.
  • The sensor shows significant potential for advancing robotic manipulation and immersive remote interaction technologies.