Liquid pool surface bubble breaking information acquisition method based on high-speed photography
A technology of bubble crushing and high-speed photography, which is applied in the research field of liquid phase surface bubble crushing, can solve problems such as unclear images, low efficiency, and inaccurate information extraction, and achieve the effect of improving efficiency
Active Publication Date: 2019-06-21
HARBIN ENG UNIV
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[0005] The purpose of the present invention is to provide a high-speed photography-based bubble breaking information on the surface of the liquid pool that improves the shooting quality, systematizes the processing flow, and extracts key information more comprehensively, efficiently and accurately The acquisition method is mainly used to solve the problems of unclear images captured by bubbles on the surface of the liquid pool, difficulties in obtaining key information of droplets generated during the breaking process, inaccurate and low efficiency of information extraction, and key issues related to the breaking characteristics of bubbles on the surface of the liquid phase. The information is automatically obtained according to the bubble breaking process, such as the starting point position of the bubble breaking, the curling rate of the bubble liquid film, the number of droplets produced by single bubble breaking, and the corresponding droplet size distribution, etc.
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[0056] The image acquisition method of the bubble breaking process is mainly completed through the following operations. First, the liquid surface forms a convex structure through the overall overflow of the liquid surface. The bubbles in the horizontal direction of the liquid surface are not affected by the occlusion of the contact position at the boundary of the liquid surface. At this time, high-speed photography is used for horizontal shooting, and the surface bubble breaking process can be obtained. More information about fragmentation in .
[0057] After obtaining the image information of the bubble crushing process, it enters into the bubble crushing image processing process. Firstly, the image of the bubble breaking is cut, and the image of the bubble formation process on the liquid surface is removed. The image when the liquid surface bubble is stable is the first frame of the video image, and the image when the bubble breaking is completed is the last frame. Import ...
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The invention provides a liquid pool surface bubble breaking information acquisition method based on high-speed photography. The invention discloses a bubble breaking image processing method, belongsto the technical field of liquid phase surface bubble breaking research, and comprises a bubble image acquisition part and a bubble breaking image processing part, and the bubble breaking image processing part comprises two parts of bubble breaking image stage division and different stage bubble breaking image information acquisition. A bubble breaking process is collected by adopting non-invasivehigh-speed photography. Key information in the bubble crushing process, such as the liquid level bubble size, the bubble crushing starting point position, the bubble crushing liquid film curling rate, the number of liquid drops generated by bubble crushing, the size of the liquid drops generated by bubble crushing and the like, can be automatically, efficiently and reliably obtained through a specific image system processing method. By means of the method, the automation degree and the obtaining rate of key information during bubble crushing can be greatly improved, and finally efficiency isimproved on the premise that accuracy is ensured.
Description
technical field [0001] The invention belongs to the technical field of bubble breakage research on liquid phase surfaces, and in particular relates to a method for obtaining bubble breakage information on the surface of a liquid pool based on high-speed photography. Background technique [0002] After a serious accident, the aerosol in the containment will eventually stay in the liquid pool under the action of natural settlement or engineering safety facilities. However, bubbles are formed in the liquid pool environment due to decay heat or pressure drop, and the bubbles are generated in the main body of the liquid phase, float up, and finally break up at the free liquid surface. This phenomenon directly causes the liquid in the liquid pool to enter the gas phase space in the form of droplets, and a similar droplet entrainment phenomenon will also appear in the water washing pool of the containment filtration and drainage system after the accident. However, when the droplet...
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IPC IPC(8): G06T7/20G06T7/64
Inventor 谷海峰陈皞魏严凇陈林林虞想尹威凯孙庆洋于汇宇郑光宗
Owner HARBIN ENG UNIV