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Measurement of Fluid Pressure

Measurement of Fluid Pressure

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...

Pressure Gauges

Pressure Gauges

Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...

Hydrostatic Pressure Force on a Curved Surface

Hydrostatic Pressure Force on a Curved Surface

Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...

Constant Pressure Calorimetry

Constant Pressure Calorimetry

Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...

Fluid Pressure

Fluid Pressure

In mechanical engineering, fluid pressure plays a critical role in designing systems that utilize liquid flow, such as hydraulic systems, pumps, and valves. When designing these systems, engineers must ensure they can withstand the forces created by fluid pressure to avoid damage or failure.
According to Pascal's law, a fluid at rest will generate equal pressure in all directions. This pressure is measured as a force per unit area, and its magnitude depends on the fluid's specific weight or...

Fluid Pressure over Curved Plate of Constant Width

Fluid Pressure over Curved Plate of Constant Width

When a curved plate of constant width is submerged in a liquid, the pressure acting normal to the plate varies continuously both in magnitude and direction. Calculating the magnitude and location of the resultant force at a point is often challenging for such cases. One of the methods to determine the resultant force and its location involves separately calculating the horizontal and vertical components of the resultant force. This complex calculation can be simplified by representing the...

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Updated: May 20, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

Side-hole two-core microstructured optical fiber for hydrostatic pressure sensing.

Gufeng Hu¹, Daru Chen, Xiaogang Jiang

¹Institute of Information Optics, Zhejiang Normal University, Jinhua 321004, China.

|July 12, 2012

Summary

A novel side-hole two-core microstructured optical fiber (STMOF) offers high sensitivity for hydrostatic pressure sensing. This fiber optic sensor demonstrates a direct link between applied pressure and spectral shifts, enabling accurate measurements.

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Last Updated: May 20, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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Published on: January 7, 2019

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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Design and Fabrication of an Optical Fiber Made of Water

Design and Fabrication of an Optical Fiber Made of Water

Published on: November 8, 2018

Area of Science:

Optical Fiber Sensing
Materials Science
Transduction Mechanisms

Background:

Microstructured optical fibers (MOFs) are increasingly utilized for sensing applications.
Hydrostatic pressure sensing requires sensitive and robust transduction mechanisms.
Existing MOF-based sensors face limitations in sensitivity and pressure-induced index change.

Purpose of the Study:

To propose and investigate a novel side-hole two-core microstructured optical fiber (STMOF) for enhanced hydrostatic pressure sensing.
To explore the mode coupling characteristics within the STMOF for pressure transduction.
To demonstrate the high sensitivity and performance of an STMOF-based hydrostatic pressure sensor.

Main Methods:

Design and simulation of a novel STMOF with specific air hole configurations.
Investigation of mode coupling between the two fiber cores.
Analysis of the pressure-induced shift in the transmission spectrum.
Experimental characterization of an STMOF-based hydrostatic pressure sensor.

Main Results:

The STMOF design incorporates side holes to enhance pressure-induced index changes.
A one-to-one correspondence was observed between applied hydrostatic pressure and peak wavelength shift.
An 8 cm STMOF sensor achieved a sensitivity of 0.111 nm/MPa over a 0-200 MPa range.
Performance evaluation of STMOFs with varying structural parameters was conducted.

Conclusions:

The proposed STMOF offers a promising platform for high-sensitivity hydrostatic pressure sensing.
The side-hole design effectively enhances the pressure transduction mechanism.
The STMOF-based sensor exhibits excellent performance and a wide measurement range.