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Author Spotlight: Quantitative Characterization of Liquid Photosensitive Bioink Properties for Continuous Digital Light Processing Based Printing

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Structured light illumination for pressure-sensitive paint measurement under ambient light.

Yu Matsuda¹, Satoshi Katayama¹, Tsubasa Ikami²

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

The Review of Scientific Instruments

|June 1, 2022

Summary

This study introduces a novel pressure-sensitive paint (PSP) method using structured light illumination. This technique effectively measures pressure under ambient light by eliminating interference, improving accuracy in challenging environments.

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Area of Science:

Optical Measurement Techniques
Fluid Dynamics Instrumentation
Surface Pressure Mapping

Background:

Conventional pressure-sensitive paint (PSP) methods struggle with ambient light interference, leading to measurement errors.
Accurate pressure measurement is crucial in various engineering and scientific applications.
Existing PSP techniques often require controlled lighting conditions, limiting their field applicability.

Purpose of the Study:

To develop and validate a PSP method capable of accurate pressure measurement under ambient light conditions.
To overcome the limitations of conventional PSP methods caused by ambient light.
To demonstrate the efficacy of structured light illumination for enhanced PSP performance.

Main Methods:

Implementation of a novel PSP technique utilizing structured light illumination.
Employing a digital mirror device to generate a sinusoidal structured light pattern.
Synchronizing PSP emission measurements with the dynamic structured light patterns to filter out ambient light.

Main Results:

Successful demonstration of pressure measurement under significant ambient light.
Elimination of ambient light interference through synchronized structured light illumination.
Validation of the proposed method by comparing results with a conventional pressure transducer, showing good agreement.

Conclusions:

The proposed structured light illumination PSP method effectively mitigates ambient light effects.
This innovative approach offers a promising solution for accurate pressure-sensitive paint measurements in real-world, non-ideal lighting conditions.
The technique enhances the robustness and applicability of PSP for various aerodynamic and structural testing scenarios.