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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

2.7K
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
2.7K

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Related Experiment Video

Updated: Mar 12, 2026

Production of a Strain-Measuring Device with an Improved 3D Printer
06:17

Production of a Strain-Measuring Device with an Improved 3D Printer

Published on: January 30, 2020

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A Stretchable Radio-Frequency Strain Sensor Using Screen Printing Technology.

Heijun Jeong1, Sungjoon Lim2

  • 1School of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 221 Heukseok-dong, Dongjak-gu, Seoul 156-756, Korea. jhijun@naver.com.

Sensors (Basel, Switzerland)
|November 10, 2016
PubMed
Summary
This summary is machine-generated.

This study introduces a stretchable radio-frequency (RF) strain sensor made with screen printing. The sensor accurately detects stretching by measuring changes in its resonant frequency.

Keywords:
PDMSstretchable RF resonatorstretchable conductive inkstretchable dielectric material

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Sensors and Instrumentation

Background:

  • Stretchable electronics are crucial for wearable devices and advanced human-machine interfaces.
  • Radio-frequency (RF) sensors offer non-contact sensing capabilities.
  • Developing reliable and scalable fabrication methods for stretchable RF sensors remains a challenge.

Purpose of the Study:

  • To propose and demonstrate a novel stretchable RF strain sensor.
  • To utilize screen printing technology for cost-effective fabrication.
  • To investigate the sensor's performance under tensile strain.

Main Methods:

  • Design of a half-wavelength patch antenna resonating at 3.7 GHz.
  • Fabrication using screen-printable, stretchable polydimethylsiloxane (PDMS) substrate.
  • Application of Dupont PE872 silver conductive ink for conductive patterns.
  • Performance evaluation through full-wave simulations and experimental measurements.

Main Results:

  • A 7.8% increase in patch length caused a resonant frequency shift from 3.7 GHz to 3.43 GHz.
  • Achieved a sensitivity of 3.43 × 10⁷ Hz/% for strain detection.
  • Confirmed that stretching along the width does not affect the resonant frequency.

Conclusions:

  • The developed screen-printed RF strain sensor demonstrates effective stretchability and sensitivity.
  • This technology shows promise for applications requiring flexible and wearable strain monitoring.
  • Screen printing offers a viable, scalable method for fabricating such advanced sensors.