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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

2.0K
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...
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Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

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The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
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Laser-Induced Graphene Stretchable Strain Sensor with Vertical and Parallel Patterns.

Yu-Hsin Yen1, Chao-Shin Hsu1, Zheng-Yan Lei1,2

  • 1Department of Bio-Industrial Mechatronics Engineering, National Chung Hsing University, Taichung City 402, Taiwan.

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|August 26, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed a laser-induced graphene (LIG) stretchable strain sensor for robotics. This piezoresistive sensor demonstrates high sensitivity and durability, enabling real-time monitoring of human motion.

Keywords:
gauge factorlaser-induced graphenepolymer carbonizationstretchable strain sensor

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Area of Science:

  • Materials Science
  • Robotics Engineering
  • Sensor Technology

Background:

  • Intelligent manufacturing and robotics require integrated sensors.
  • Stretchable sensors are crucial for robotics and wearable devices.
  • Piezoresistive sensors offer advantages in strain detection.

Purpose of the Study:

  • To develop a novel piezoresistive stretchable strain sensor.
  • To utilize laser-induced graphene (LIG) for enhanced sensor performance.
  • To investigate the performance of different LIG pattern structures.

Main Methods:

  • Fabrication of a 3D porous LIG structure from polyimide (PI) film via laser scanning.
  • Creation of two LIG pattern structures: parallel and vertical.
  • Characterization using Scanning Electron Microscopy (SEM), X-ray Energy Dispersive Spectrometry (EDS), and Raman Spectroscopy.
  • Performance evaluation through tensile tests to quantify resistance changes and gauge factors.

Main Results:

  • The parallel LIG strain sensor achieved a high gauge factor of 15.79 between 10% and 20% strain.
  • Demonstrated high sensitivity, excellent repeatability, good durability, and fast response times.
  • Successfully quantified relative resistance changes and gauge factors for both parallel and vertical configurations.

Conclusions:

  • The developed LIG stretchable strain sensor is suitable for intelligent manufacturing and robotics.
  • The sensor exhibits promising performance for real-time monitoring of human motions like finger and wrist bending, and throat swallowing.
  • Laser-induced graphene offers a viable material for advanced wearable and robotic sensing applications.