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Published on: September 1, 2016
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Module for Monitoring the Probe-Skin Contact Force in the Study of Vibration Perception on the Wrist
Dorota Czopek1, Robert Barański1, Jerzy Wiciak1
1Department of Mechanics and Vibroacoustics, Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland.
Sensors (Basel, Switzerland)
|April 3, 2021
Summary
This study introduces a novel module for monitoring probe-skin contact force during wrist vibrotactile testing. Consistent force control is crucial for accurate measurements of vibration perception thresholds.
Area of Science:
- Biomedical Engineering
- Human-Computer Interaction
- Sensory Neuroscience
Background:
- Accurate measurement of vibrotactile perception is essential for assessing neural function and developing haptic interfaces.
- Standardized testing procedures for wrist-based vibrotactile measurements are lacking, necessitating robust monitoring systems.
- Controlling the contact force between a measurement probe and the skin is critical for ensuring measurement repeatability and reliability.
Purpose of the Study:
- To present a novel module for monitoring the contact force between a vibrotactile measurement probe and the skin on the wrist.
- To evaluate two distinct contact force measurement solutions for their accuracy and susceptibility to vibration interference.
- To assess vibrotactile discrimination thresholds on the ventral wrist, contributing to the development of wrist-worn information transmission devices.
Main Methods:
- Development of a contact force monitoring module integrated into an automated testing stand for vibrotactile discrimination thresholds.
- Implementation of measurement procedures using LabVIEW software and psychophysical adaptive methods (1 up-2 down, 2IFC/3IFC).
- Comparison of two contact force measurement techniques, analyzing their accuracy and the influence of vibrations on readings.
Main Results:
- The study presents a comparative analysis of two contact force monitoring solutions, detailing their performance characteristics.
- Vibrotactile amplitude and frequency discrimination thresholds were measured on the ventral wrist across five frequencies (25-250 Hz).
- The findings provide insights into the repeatability of vibrotactile measurements, emphasizing the importance of controlled contact force.
Conclusions:
- The developed module enables continuous monitoring of probe-skin contact force, enhancing the reliability of vibrotactile measurements on the wrist.
- Accurate force control is identified as a key factor for achieving repeatable vibrotactile sensation threshold measurements.
- The research supports the feasibility of creating vibrating interfaces for information transmission via wrist-worn devices.
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