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Related Concept Videos

Applications of Integration to Find Hydrostatic Pressure01:30

Applications of Integration to Find Hydrostatic Pressure

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Hydrostatic force is a fluid's total force at rest on a surface. For a horizontal surface submerged at a fixed depth, the pressure is constant and calculated as the product of fluid density, gravitational acceleration, and depth. In the case of a vertical dam wall submerged in water, this force is not evenly distributed due to the increasing pressure with depth. This variation arises from the cumulative weight of the water above each point. Integration is used to account for the continuous...
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Microbubble-based fiber-optic Fabry-Perot pressure sensor for high-temperature application.

Zhe Li, Pinggang Jia, Guocheng Fang

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    Summary
    This summary is machine-generated.

    Researchers developed a novel fiber-optic Fabry-Perot (FP) pressure sensor using a microbubble structure. This high-temperature sensor exhibits a very low temperature coefficient, making it suitable for demanding environments.

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    Area of Science:

    • Optoelectronics
    • Materials Science
    • Sensor Technology

    Background:

    • Traditional pressure sensors face limitations in high-temperature applications.
    • Fabry-Perot (FP) sensors offer potential for high-temperature pressure sensing.
    • Developing sensors with low temperature coefficients is crucial for accurate measurements.

    Purpose of the Study:

    • To fabricate a fiber-optic Fabry-Perot (FP) pressure sensor with a microbubble structure.
    • To achieve a very low temperature coefficient for high-temperature applications.
    • To evaluate the performance of the fabricated sensor under varying temperature and pressure conditions.

    Main Methods:

    • Fabrication of a thin-walled microbubble using arc discharge and a fusion splicer on a gas-pressurized hollow silica tube (HST).
    • Integration of a single-mode fiber (SMF) into the microbubble to form the FP cavity.
    • Characterization of the sensor's sensitivity and temperature coefficient at different temperatures.

    Main Results:

    • Successful fabrication of a microbubble with a diameter up to 360 μm and wall thickness of ~0.5 μm.
    • Achieved linear pressure sensitivities of -6.382 nm/MPa at 20°C and -5.912 nm/MPa at 600°C within a 1 MPa range.
    • Demonstrated a very low temperature coefficient of approximately 0.17 pm/°C.

    Conclusions:

    • The developed fiber-optic FP pressure sensor based on a microbubble is suitable for high-temperature environments.
    • The sensor exhibits excellent pressure sensitivity and a remarkably low temperature coefficient.
    • This technology holds promise for advanced pressure monitoring in extreme conditions.