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Related Experiment Video

Updated: Sep 22, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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Three-Dimensional-Printed Mechanical Transmission Element with a Fiber Bragg Grating Sensor Embedded in a Replaceable

Piotr Lesiak1, Konrad Pogorzelec1, Aleksandra Bochenek1

  • 1Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-665 Warsaw, Poland.

Sensors (Basel, Switzerland)
|May 20, 2022
PubMed
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Researchers developed a novel 3D-printed compliant mechanism integrating a Fiber Bragg Grating (FBG) sensor. This innovation allows adaptable displacement amplification for optimal sensor performance in robotic and sensing applications.

Area of Science:

  • Mechanical Engineering
  • Materials Science
  • Optical Sensing

Background:

  • Compliant mechanisms are increasingly utilized due to advancements in 3D printing.
  • These mechanisms are valuable for precise positioning in robotics and displacement characterization in sensing.
  • 3D printing with PLA enables integration of fiber optic sensors into compliant structures.

Purpose of the Study:

  • To describe an innovative technology for embedding Fiber Bragg Grating (FBG) sensors into 3D-printed compliant mechanisms.
  • To design a mechanical transmission element that modifies displacement amplitude for optimal FBG sensor operation.
  • To achieve adaptable flexural sensitivity for tailored sensing applications.

Main Methods:

  • Designing and 3D printing a compliant mechanism with an integrated FBG sensor.
Keywords:
3D-printed materialsFiber Bragg Gratingscompliant mechanismsoptical fiber sensors

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Last Updated: Sep 22, 2025

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  • Developing a clippers-based mechanical transmission element for adjustable displacement amplification.
  • Characterizing the flexural sensitivity of the integrated FBG sensor system.

    • Main Results:

    • Successful integration of an FBG sensor within a 3D-printed compliant mechanism.
    • Demonstration of a mechanical transmission element capable of freely modifying displacement amplitude.
    • Achieved a flexural sensitivity of 1.26 (mε/mm) for the replaceable measuring head, adaptable to specific flexure designs.

    Conclusions:

    • The developed technology offers a novel approach for creating adaptable FBG sensing systems using 3D-printed compliant mechanisms.
    • The clippers-based design allows for optimal FBG sensor performance without external modifications.
    • This innovation has potential applications in precise robotic positioning and advanced displacement sensing.