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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Stretchable distributed fiber-optic sensors.

Hedan Bai1, Shuo Li2, Jose Barreiros3

  • 1Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA.

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|November 13, 2020
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Summary
This summary is machine-generated.

We developed a new stretchable distributed fiber-optic sensor (DFOS) for soft robotics and electronics. This innovative sensor accurately detects location, magnitude, and type of deformation in real time.

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Area of Science:

  • Materials Science
  • Robotics
  • Sensor Technology

Background:

  • Silica-based distributed fiber-optic sensors (DFOS) excel in sensing strain, pressure, and temperature in rigid structures.
  • Existing DFOS are unsuitable for soft robotics and stretchable electronics due to limitations with large strains.

Purpose of the Study:

  • To develop a novel stretchable DFOS compatible with large deformations.
  • To enable real-time, multi-modal, and multi-location mechanical deformation sensing in soft systems.

Main Methods:

  • Fabrication of a stretchable DFOS using parallel elastomeric lightguides with chromatic patterns.
  • Utilizing frustrated total internal reflection and absorption for sensing.
  • Integration into a wireless glove for demonstrating complex motion capture.

Main Results:

  • The stretchable DFOS successfully distinguishes and quantifies location, magnitude, and mode (stretch, bend, press) of deformation.
  • Demonstrated multilocation and multimodal deformation decoupling using a single sensor.
  • The integrated glove accurately captured finger joint movements and external presses simultaneously.

Conclusions:

  • The developed elastomeric lightguide-based DFOS overcomes limitations of silica-based sensors for soft and stretchable applications.
  • This technology offers a promising solution for advanced human-machine interfaces and soft robotic control.
  • Real-time, simultaneous sensing of multiple deformation types is achievable with a single, stretchable sensor.