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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...

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Related Experiment Video

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A Tactile Automated Passive-Finger Stimulator TAPS
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Development of a bottle-type sensor measuring two-hand movement.

Soshiro Kashima1, Keisuke Irie2, Daiki Watanabe1

  • 1Department of Physical Therapy, Human Health Sciences, Graduate School of Medicine, Kyoto University, Japan.

Medical Engineering & Physics
|April 3, 2025
PubMed
Summary

A new bottle-type sensor was developed to measure two-hand movements, showing promise in correlating with grip and pinch forces. Further improvements are needed for the cap component

Keywords:
Bottle-type sensorGripPinchTwo-hand movement

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Area of Science:

  • Biomechanics
  • Rehabilitation Engineering
  • Sensor Technology

Background:

  • Coordinated bilateral hand movements are crucial for daily activities.
  • Existing devices have limitations in quantitatively assessing two-hand function.
  • There is a need for novel tools to measure simultaneous hand movements.

Purpose of the Study:

  • To develop and validate a novel bottle-type sensor for simultaneous measurement of two-hand movements.
  • To assess the correlation between the sensor's readings and standard grip/pinch force measurements.
  • To evaluate the reliability of the developed sensor system.

Main Methods:

  • A bottle-type sensor was constructed using a flexible sensor sheet on a 3D-printed structure.
  • Force components were calculated from load data, summing loads for each finger.
  • Validity was tested by correlating sensor data with grip and pinch forces in 21 healthy adults.
  • Reliability was assessed using intraclass correlation coefficient (ICC) in 9 healthy adults.

Main Results:

  • The bottle-type sensor demonstrated significant positive correlations with both grip and pinch forces.
  • The body component of the sensor showed good reliability (ICC > 0.75).
  • The cap component exhibited insufficient reliability (ICC < 0.75).

Conclusions:

  • The developed bottle-type sensor shows potential for measuring two-hand movements and correlates with grip/pinch forces.
  • The reliability of the cap component requires improvement for clinical application.
  • Future research should focus on enhancing the cap's reliability and testing in patient populations.