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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...

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Pressure-Sensitive Nano-Sheet for Optical Pressure Measurement.

Yu Matsuda^1,2, Riki Orimo¹, Yusaku Abe¹

¹Department of Modern Mechanical Engineering, Waseda University, 3-4-1 Ookubo, Shinjuku-ku, Tokyo 169-8555, Japan.

Sensors (Basel, Switzerland)

|November 13, 2021

Summary

This study introduces Pressure-Sensitive Nano-Sheets (PSNS) as a novel, sticker-like alternative to traditional Pressure-Sensitive Paint (PSP). PSNS eliminates organic solvents and application skill dependency for accurate pressure mapping.

Keywords:

nano-sheet pressure measurement pressure-sensitive nano-sheet pressure-sensitive paint

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Area of Science:

Materials Science
Aerodynamics
Optical Measurement Techniques

Background:

Pressure-Sensitive Paint (PSP) is a valuable tool for measuring surface pressure distributions.
Traditional PSP application involves organic solvents and requires significant skill, posing accessibility and environmental challenges.
A sticker-like PSP alternative would overcome these limitations, simplifying application and expanding PSP usage.

Purpose of the Study:

To develop and characterize freestanding Pressure-Sensitive Nano-Sheets (PSNS) as a novel PSP alternative.
To evaluate the performance of PSNS fabricated with different polymer binders.

Main Methods:

Fabrication of freestanding PSNS using a sacrificial layer process and spin-coating.
Incorporation of Pt(II) meso-tetra(pentafluorophenyl)porphine (PtTFPP) as the pressure-sensitive dye.
Utilizing poly(1-trimethylsilyl-propyne) (PTMSP) and poly(L-lactic acid) (PLLA) as polymer binders.

Main Results:

Successfully fabricated PSNS samples using PTMSP and PLLA binders.
Investigated pressure- and temperature-sensitivity, luminescence lifetime, and quantum yield.
PTMSP-based PSNS exhibited higher pressure-sensitivity, while PLLA-based PSNS showed a higher quantum yield.

Conclusions:

PSNS offers a promising, solvent-free alternative to conventional PSP.
The choice of polymer binder (PTMSP vs. PLLA) influences the trade-off between pressure-sensitivity and quantum yield.
PSNS technology has the potential to simplify and broaden the application of pressure-mapping techniques.