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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

704
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...
704

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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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Large detection range and high strain sensitivity fiber SPR sensor based on wave structure.

Yong Wei, Puxi Ren, Chunlan Liu

    Optics Express
    |June 11, 2024
    PubMed
    Summary

    This study introduces a novel wave structured fiber sensor for enhanced strain detection. The sensor achieves a wide 0-1800µε range and high sensitivity up to 36.25pm/µε.

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    Area of Science:

    • Photonics and optical sensing
    • Materials science and engineering
    • Fiber optic sensor technology

    Background:

    • Traditional fiber strain sensors often face limitations in balancing detection range and sensitivity.
    • Surface Plasmon Resonance (SPR) based sensors offer high sensitivity but can be constrained in their operational range.
    • Developing integrated solutions for broad-range, high-sensitivity strain measurement is crucial for various industrial and scientific applications.

    Purpose of the Study:

    • To propose and experimentally validate a novel wave structured fiber sensor for Surface Plasmon Resonance (SPR) based strain detection.
    • To enhance the strain detection range and sensitivity of fiber optic sensors through a unique wave structure.
    • To provide a new methodology for improving the performance metrics of strain sensing technologies.

    Main Methods:

    • Fabrication of a fiber optic sensor incorporating a wave structured fiber design.
    • Utilizing Surface Plasmon Resonance (SPR) principles for optical signal interrogation.
    • Subjecting the sensor to axial strain and measuring the resulting shifts in SPR incidence angle.
    • Characterizing the sensor's performance in terms of strain detection range and sensitivity.

    Main Results:

    • The wave structured fiber SPR strain sensor demonstrated a large strain detection range, extending from 0 to 1800µε.
    • A maximum strain sensitivity of 36.25pm/µε was achieved with the proposed sensor design.
    • The wave structure effectively increased sensor stretchability for a wider range and modulated SPR incidence angle for higher sensitivity.

    Conclusions:

    • The proposed wave structured fiber SPR strain sensor offers a significant advancement in achieving both large detection range and high sensitivity.
    • This innovative design provides a new and effective approach for next-generation strain sensing applications.
    • The findings pave the way for more robust and versatile fiber optic sensing solutions in demanding environments.