Flow field radiation gathering and radiation scattering measurement method based on oil film fluorescence brightness

Abstract

The invention discloses a flow field radiation gathering and radiation scattering measurement method based on oil film fluorescence brightness, and the method comprises the following steps: respectively obtaining images of fluorescence generated by silicone oil with fluorescent pigment through ultraviolet irradiation under at least two different known oil film thicknesses above a water body, and analyzing the images to obtain a gray value corresponding to the fluorescence intensity; performing calculating according to the known oil film thickness and the gray value to obtain an oil film thickness-gray value relation; and calculating the fluctuation condition of radiation gathering and radiation scattering of the silicone oil with the fluorescent pigment on the surface of the water body according to the relation between the oil film thickness-gray value and the fluorescent images of the silicone oil shot when the water body is static and disturbed. According to the method, the detectionintuition is enhanced, the cost is low, the amount of data needing to be processed is small, the post-processing steps are simple, and the difficulty is greatly reduced. Quantitative analysis can beconveniently carried out on the fluctuation intensity of surface fluid radiation gathering and radiation scattering, and certain help is provided for summarizing the law of the fluid surface radiationgathering and radiation scattering phenomenon caused by underwater or water surface navigation bodies.

Description

technical field [0001] The invention relates to the field of hydrodynamic analysis, in particular to a method for measuring flow field convergence and divergence based on oil film fluorescence brightness. Background technique [0002] In nature, seawater will produce various fluctuations due to natural factors such as wind, gravity and geological conditions. When an underwater or surface vehicle passes by, a phenomenon of convergence and divergence with obvious texture features will be formed on the water surface (such as kelvin waves and internal wave reflections). The spatial scale of the traces produced by the passing of the flying objects is often very large, so these special flow field characteristics can become an important signal source for judging whether there are underwater or surface moving targets passing by. The detection and tracking has great military significance and practical engineering significance. [0003] Among the existing experimental methods for ex...

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Problems solved by technology

[0006] In view of the above-mentioned existing detection methods, the experimental cost is high, the steps are complicated, the final data is complicated, and the post-processing is difficult.

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