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Related Concept Videos

Normal and Shear Force01:14

Normal and Shear Force

When a beam is subjected to different loads, such as weight, pressure, or other external forces, internal forces are generated within the beam. These forces can have a significant impact on the overall stability and strength of the structure. Engineers use various methods to analyze and determine the magnitude and direction of these internal forces. One common technique used to determine internal forces in beams is the method of sections. This method involves considering an imaginary point or...

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Microfluidic Channel-Based Soft Electrodes and Their Application in Capacitive Pressure Sensing
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A polymer-based capacitive sensing array for normal and shear force measurement.

Ming-Yuan Cheng1, Chun-Liang Lin, Yu-Tse Lai

  • 1Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan. d91522008@ntu.edu.tw

Sensors (Basel, Switzerland)
|December 14, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a polymer-based capacitive sensing array for measuring normal and shear forces. The flexible printed circuit board (FPCB) and polydimethylsiloxane (PDMS) device offers high manufacturability and a minimum resolvable force of 26 mN.

Keywords:
capacitive sensingflexible electronicsmicromachiningshear sensing arraytactile sensing array

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Microfabricated Post-Array-Detectors (mPADs): an Approach to Isolate Mechanical Forces
61:34

Microfabricated Post-Array-Detectors (mPADs): an Approach to Isolate Mechanical Forces

Published on: October 1, 2007

Area of Science:

  • Materials Science
  • Sensor Technology
  • Mechanical Engineering

Background:

  • Capacitive sensors are crucial for force measurement.
  • Existing designs often face manufacturing complexities.
  • Need for integrated normal and shear force sensing.

Purpose of the Study:

  • Develop a polymer-based capacitive sensing array.
  • Enable simultaneous measurement of normal and shear forces.
  • Enhance manufacturability using FPCB and PDMS.

Main Methods:

  • Fabrication using micromachining and FPCB technologies.
  • Integration of polydimethylsiloxane (PDMS) and FPCB.
  • Design of a 2x2 array of capacitive sensing cells per shear element.
  • Implementation of a signal scanning circuit.

Main Results:

  • Achieved a maximum sensitivity of 1.67%/mN.
  • Demonstrated a minimum resolvable force of 26 mN.
  • Successfully captured capacitance distributions for normal and shear forces.

Conclusions:

  • The developed polymer-based capacitive sensing array is highly manufacturable.
  • The device effectively measures both normal and shear forces.
  • Potential for applications requiring tactile sensing and force monitoring.