Simultaneous 3D surface profile and pressure measurement using phase-shift profilometry and pressure-sensitive paint

Li, Yongzeng; Dong, Zhe; Lei, Liang; Liu, Yingzheng; Peng, Di

doi:10.1063/5.0031036

Cited by 7 publications

(2 citation statements)

References 39 publications

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“…Therefore, the proposed system has great potential for the simultaneous measurement of threedimensional (3D) profiles and pressure distributions. This will provide a valuable experimental approach to 3D-PSP [44][45][46][47][48][49] measurements of models with complex geometry and deformation. Research on this topic is planned for the future.…”

Section: Discussionmentioning

confidence: 99%

A dual-camera single-shot lifetime method with fully controllable exposure gates for pressure-sensitive paint measurements on fast-rotating surfaces

Li¹,

Dong²,

Peng³

et al. 2022

Meas. Sci. Technol.

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This paper proposes a dual-camera single-shot lifetime method for pressure-sensitive paint (PSP) measurements on fast-rotating surfaces. Two cameras with fully controllable exposure gates are used for image acquisition to reduce the motion blur due to the open-ended exposure of the interline transfer charge-coupled device camera which was typically used for the single-shot lifetime method. The images can thus be processed without deblurring for a wider rotating speed range than is possible with existing techniques. More importantly, both frames have equal exposure times and therefore equal blur lengths. This enables precise pixel-to-pixel image matching and minimizes image registration errors. In addition, the signal strengths of the frames can be balanced, enabling shot-noise-induced errors to be reduced by independent adjustment of the aperture ratio. A pressure uncertainty estimation model is established to evaluate the measurement errors, which helps determine the system parameters. The dual-camera PSP system is calibrated and then validated through the surface pressure measurement of a fast-rotating disk. It is found that the exposure time te has little effect on the PSP sensitivity, whereas the delay time td affects both the pressure sensitivity and the measurement error. Both te and td are set to 5 μs in the rotating disk experiment. Images with a blur length of 1.4 pixels are captured and processed without deblurring to yield reasonable surface pressure results. The pressure error is decreased from 1.05 to 0.65 kPa by increasing the aperture ratio F from 2 to 4.

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Section: Discussionmentioning

confidence: 99%

A dual-camera single-shot lifetime method with fully controllable exposure gates for pressure-sensitive paint measurements on fast-rotating surfaces

Li¹,

Dong²,

Peng³

et al. 2022

Meas. Sci. Technol.

Self Cite

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“…PC-PSP is a sprayable form of an unsteady (time-resolved) PSP that can be applied on an aerodynamic model before testing. It consists of a polymer/ceramic basecoat (SiO 2 , TiO 2 ), which is first applied on the model as a thin layer and subsequently used to host the luminophore molecules [159][160][161][162][163][164][165][166][167][168][169][170]. Since PC-PSPs usually consist of TiO 2 particles which show photocatalytic activity, the luminescent intensity will decrease over time.…”

Section: Pressure-sensitive Paintsmentioning

confidence: 99%

The Art of Fluorescence Imaging with Chemical Sensors: The Next Decade 2012–2022

Schäferling,

Ondrus

2024

Chemosensors

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Imaging methods by the means of optical sensors are applied in diverse scientific areas such as medical research and diagnostics, aerodynamics, environmental analysis, or marine research. After a general introduction to the field, this review is focused on works published between 2012 and 2022. The covered topics include planar sensors (optrodes), nanoprobes, and sensitive coatings. Advanced sensor materials combined with imaging technologies enable the visualization of parameters which exhibit no intrinsic color or fluorescence, such as oxygen, pH, CO2, H2O2, Ca2+, or temperature. The progress on the development of multiple sensors and methods for referenced signal read out is also highlighted, as is the recent progress in device design and application formats using model systems in the lab or methods for measurements’ in the field.

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Simultaneous 3D Surface Geometry and Pressure Distribution Measurement

Shi

Quinn²

2022

Development and Application of Light-Field Cameras in Fluid Measurements

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Simultaneous 3D surface profile and pressure measurement using phase-shift profilometry and pressure-sensitive paint

Cited by 7 publications

References 39 publications

A dual-camera single-shot lifetime method with fully controllable exposure gates for pressure-sensitive paint measurements on fast-rotating surfaces

A dual-camera single-shot lifetime method with fully controllable exposure gates for pressure-sensitive paint measurements on fast-rotating surfaces

The Art of Fluorescence Imaging with Chemical Sensors: The Next Decade 2012–2022

Simultaneous 3D Surface Geometry and Pressure Distribution Measurement

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