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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

396
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...
396

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Directional touch sensing for stiffness singularity search in an object using microfinger with tactile sensor.

Satoshi Konishi1,2,3,4, Yugo Kakehi5, Yuto Hori5

  • 1Department of Mechanical Engineering, Ritsumeikan University, Kusatsu, 525-8577, Japan. konishi@se.ritsumei.ac.jp.

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Summary

This study introduces a microfinger with active touch sensing for evaluating stiffness. The developed algorithm efficiently locates stiffness anomalies, showing promise for medical diagnosis like tumor identification.

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Area of Science:

  • Robotics
  • Biomedical Engineering
  • Sensor Technology

Background:

  • Palpation is a fundamental diagnostic technique in medicine.
  • Existing micro-tactile sensors have limitations in exploring complex internal body spaces.
  • The need for precise localization of abnormalities within elastic tissues is critical for diagnosis.

Purpose of the Study:

  • To develop a soft microfinger capable of active touch sensing for evaluating stiffness distribution.
  • To create an efficient algorithm for localizing stiffness singular parts using directional touch sensing.
  • To enhance minimally invasive diagnostic capabilities in confined anatomical regions.

Main Methods:

  • Integration of micro tactile sensors and artificial muscles to create a soft microfinger with bending actuation.
  • Utilizing a push-in motion for active touch sensing to assess stiffness.
  • Developing and applying a directional touch sensing algorithm for efficient anomaly localization.
  • Experimentation using a gelatin block with a buried rigid ball to validate the method.

Main Results:

  • The microfinger successfully performed active touch sensing and stiffness evaluation.
  • The proposed algorithm efficiently identified the location of the buried rigid ball within the gelatin model.
  • Demonstrated the feasibility of directional touch sensing for pinpointing stiffness variations.

Conclusions:

  • The developed microfinger and algorithm offer an efficient method for identifying localized stiffness anomalies.
  • This technology holds significant potential for applications in endoscopic medical diagnosis, particularly for tumor localization.
  • The findings suggest a pathway towards more accurate and less invasive diagnostic procedures.