首页|Differential luminescent imaging method for pressure field measurement
Differential luminescent imaging method for pressure field measurement
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NSTL
Elsevier
A differential luminescent imaging method is applied to a pressure-sensitive paint (PSP) measurement to capture a quasi-steady acoustic pressure field. Conventionally, PSP measurements capture an absolute luminescent intensity and convert it to pressure. When the mean component of the absolute luminescent intensity occupies a substantial portion of the dynamic range of the image acquisition device, it leads to a coarse signal resolution. Differential luminescent imaging, utilizing two-color luminescent intensities and a differential amplifier, extracts the fluctuation component from the absolute luminescent intensity. The developed differential luminescent imaging system gives a point-wise pressure measurement. These measurements are combined to produce a spatially resolved image. It is capable of resolving the periodic pressure wave over the acoustic field where the resolution of a conventional PSP measurement falls into one digital count. This comparison to a conventional PSP measurement is given as a reference by which to evaluate the spatiotemporal resolution of the differential luminescent imaging method.
NSTL
Elsevier
