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Related Concept Videos

Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

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Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
308

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Updated: Sep 11, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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Transient hydraulic pressure sensor based on single-hole-dual-core fiber Bragg grating.

Anping Xiao, Xiqing Peng, Qiang Ling

    Optics Express
    |August 13, 2025
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    Summary

    A new fiber-optic transient hydraulic pressure sensor using single-hole-dual-core fiber Bragg grating (SHDC-FBG) offers high precision for pipeline leak detection. This compact, cost-effective sensor performs comparably to traditional ones in harsh environments.

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    Area of Science:

    • Optoelectronics
    • Fiber Optic Sensing
    • Materials Science

    Background:

    • Transient hydraulic pressure monitoring is vital for petroleum and gas pipeline integrity.
    • Existing sensing technologies face limitations in real-time, long-distance, and harsh environment applications.

    Purpose of the Study:

    • To develop and validate a novel fiber-optic transient hydraulic pressure sensor for pipeline leak detection.
    • To investigate the sensing characteristics and performance of the proposed sensor.

    Main Methods:

    • Fabrication of a fiber-optic transient hydraulic pressure sensor using single-hole-dual-core fiber Bragg grating (SHDC-FBG) via deep ultraviolet laser inscription.
    • Modal field analysis and theoretical simulation of SHDC-FBG resonance wavelength.
    • Experimental characterization of static and dynamic pressure sensing performance and comparison with conventional resistive sensors.

    Main Results:

    • Simulation results closely matched experimental data, confirming pressure-induced refractive index changes.
    • The SHDC-FBG sensor demonstrated a sensitivity of -5.4 pm/MPa over a 0-20 MPa range.
    • The sensor's performance in leak detection was comparable to conventional resistive pressure sensors.

    Conclusions:

    • The developed SHDC-FBG sensor is a viable and competitive technology for transient hydraulic pressure and pipeline leak detection.
    • Its compact size, low cost, and electromagnetic immunity make it suitable for long-distance and harsh industrial environments.