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Related Concept Videos

Measurement of Fluid Pressure01:16

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...
Fluid Pressure01:14

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 Flat Plate of Variable Width01:02

Fluid Pressure over Flat Plate of Variable Width

When a flat plate is submerged in a fluid, the fluid exerts pressure on the plate. This pressure can lead to many different phenomena, including drag and buoyancy. To understand the behavior of the fluid over a flat plate of variable width, it is essential to analyze the distribution of the pressure exerted.
The pressure distribution on the plate can be calculated by determining the force that acts on a differential area strip of the plate. Thus, the magnitude of the force is equal to the...
Fluid Pressure over Flat Plate of Constant Width01:05

Fluid Pressure over Flat Plate of Constant Width

When a body is submerged in water, it experiences fluid pressure acting normal on its surface and distributed over its area. For better design structures, it is crucial to determine the magnitude and location of the resultant force acting on the surface. In the case of a rectangular plate of constant width submerged in water, the pressure increases with depth, resulting in a linearly varying trapezoidal pressure distribution from the upper to the lower edge of the plate.
The resultant force...

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Imaging Integrin Tension and Cellular Force at Submicron Resolution with an Integrative Tension Sensor
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Optofluidic pressure sensor based on interferometric imaging.

Wuzhou Song1, Demetri Psaltis

  • 1Optics Laboratory, School of Engineering, Swiss Federal Institute of Technology Lausanne (EPFL), CH-1015 Lausanne, Switzerland. wuzhou.song@epfl.ch

Optics Letters
|November 3, 2010
PubMed
Summary
This summary is machine-generated.

We developed a chip-scale sensor using optofluidics and imaging to measure liquid pressure. This device offers reliable pressure readings with a 0-22 psi range and ±1.4% accuracy.

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Area of Science:

  • Optofluidics
  • Interferometry
  • Sensor Technology

Background:

  • Accurate liquid pressure measurement is crucial in various scientific and industrial applications.
  • Existing pressure sensors may face limitations in terms of size, sensitivity, or cost.
  • Optofluidic devices offer miniaturization and unique sensing capabilities.

Purpose of the Study:

  • To present a novel chip-scale optofluidic interferometric sensor for liquid pressure measurement.
  • To demonstrate the sensor's performance using an imaging-based analysis method.
  • To enhance measurement reliability through pattern recognition algorithms.

Main Methods:

  • Fabrication of a chip-scale sensor using multilayer soft lithography with a polymer.
  • Integration of a flexible air gap optical cavity within the chip.
  • Illumination of the cavity with monochromatic light to generate pressure-dependent interference patterns.
  • Imaging and analysis of interference patterns, including the use of a pattern recognition algorithm.

Main Results:

  • Successful demonstration of a chip-scale optofluidic interferometric pressure sensor.
  • Achieved a working pressure range of 0-22 psi.
  • Obtained an accuracy of ±1.4% of full scale under temperature-stabilized conditions.

Conclusions:

  • The developed optofluidic sensor provides a reliable and accurate method for chip-scale liquid pressure measurement.
  • The imaging-based approach combined with pattern recognition simplifies calculations and improves reliability.
  • This technology holds potential for miniaturized pressure sensing applications.