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In-water color particle image velocimetry system and measuring method thereof

A technology of particle image velocity measurement and measurement method, which is applied in the direction of fluid velocity measurement, velocity/acceleration/impact measurement, and measurement devices, etc., which can solve the problems of restricting the research level of water flow and sediment, high requirements for measurement on lighting conditions, and error vectors of flow field data. Many problems, to achieve the effect of promoting large-scale use, improving the accuracy of particle identification and matching, and improving accuracy and efficiency

Active Publication Date: 2015-07-01
NANJING HYDRAULIC RES INST
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Problems solved by technology

However, since the current PTV flow field measurement system mostly uses black and white cameras, the complex lighting conditions of the model test and the reflection of the water surface and the surface of the model will generate more lighting noise, which will affect the black and white particle image (the particles are usually white, and the reflection is also white). Larger, the measurement requires high lighting conditions, many flow field data error vectors, complex post-processing and other problems need to be solved urgently, which has seriously restricted the improvement of the research level of water flow and sediment

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  • In-water color particle image velocimetry system and measuring method thereof
  • In-water color particle image velocimetry system and measuring method thereof

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] like figure 1 As shown, a color particle image velocity measurement system in water flow includes a river engineering model 1, colored tracer particles (red tracer particles 2), green tracer particles 3, blue tracer particles 4, color network camera 5, and POE switch 6 and a digital image processing device 7; the colored tracer particles are evenly distributed in the water flow of the river engineering model 1, the color network camera 5 is installed above the water flow surface of the river engineering model 1, and the network camera 5 is connected to the POE switch 6, The POE switch 6 is connected with a digital image processing device 7 . The colored tracer particles are in the shape of an ellipse, and the width of the long axis of the tracer particles is 2 to 4 times the width of the short axis of the tracer particles. The colored tracer particles are divi...

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Abstract

The invention discloses an in-water color particle image velocimetry system comprising a river project model, color tracer particles, a color web camera, a POE (power over Ethernet) switch and a digital image processing device. The color tracer particles are evenly distributed in water flow of the river project model, the web camera mounted above a surface of the water flow of the river project model is connected with the POE switch connected with the digital image processing device comprising digital imaging processing software. The invention further provides a color particle image velocimetry measuring method. By the arrangement, the technical problems that a black and white video camera sets higher requirements for light condition and is prone to being affected by light noises, more error vectors appear in flow field data, so that measuring accuracy is affected are solved.

Description

technical field [0001] The invention relates to a color particle image velocity measurement system and a measurement method thereof, in particular to a color particle image velocity measurement system and a measurement method of a surface flow field in a water flow, and belongs to the technical fields of hydraulics and river dynamics. Background technique [0002] Water ecology and water environment are the foundation of ecological civilization construction. Ecological construction projects such as water ecological governance and restoration, water pollution prevention and water environment improvement urgently need a higher level of water flow and sediment research as scientific and technological support. Model test is an important method to carry out the study of water flow and sediment, the water flow structure is the basis of model test research, and the flow velocity measurement technology is the key means to obtain the water flow structure. Therefore, it is very ne...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P5/20
Inventor 陈诚
Owner NANJING HYDRAULIC RES INST
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