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Yellow River ice run ice floating speed measuring method

A technology of velocity measurement and Huanghe Ling, which is applied in the direction of fluid velocity measurement, velocity/acceleration/impact measurement, measurement device, etc., can solve the problems of unsystematic research and application of river ice observation, and avoid field observation operation risks and data. The effect of strong representativeness and improved accuracy of measurement results

Inactive Publication Date: 2015-05-06
YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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Problems solved by technology

At present, this technology has been initially tried in the field of sea ice monitoring, but there is no systematic research and application in domestic river ice observation.

Method used

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  • Yellow River ice run ice floating speed measuring method
  • Yellow River ice run ice floating speed measuring method
  • Yellow River ice run ice floating speed measuring method

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Embodiment Construction

[0021] A method for measuring the flow speed of the Yellow River in the ice flood season, comprising the steps of:

[0022] (1) Use OpenCV and C# development platform to segment and extract the image of the river area in the fixed field of view of the camera as the target area of ​​interest;

[0023] (2) Use the two-dimensional plane calibration method to calibrate the region of interest in the field of view. The on-site calibration board used in the present invention is 2.2 meters in length and width, and uses waterproof advertising cloth as a raw material. It is light and easy to fold and carry, and has strong toughness and is not easy to be damaged. Four rectangles with a length of 1 meter and a width of 0.5 meters are evenly distributed on the calibration board, and there are 12 key corner points that are easy to be identified, and the shortest distance between them is 0.5 meters. The specific calibration method: during the freezing period of the Yellow River, the prepare...

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Abstract

A Yellow River ice run ice floating speed measuring method includes the following steps: (1) segmenting and extracting an image of a river channel region to server as a target interest region; (2) calibrating an interest region in a field; (3) adopting an L-K optical flow method to serve as a basic algorithm for moving target detection and adding a pyramid model on the basis of the L-K optical flow method; (4) utilizing a strong angular point set as an ice tracking characteristic according to the Yellow River ice characteristic to conduct simultaneously tracking of multiple moving targets; (5) measuring the actual moving displacement of a plurality of ice targets in the field range and calculating the multi-target average speed; (6) building a software operation platform facing clients. The method has the advantages of being good in robustness, the accuracy of measurement results is greatly improved compared with the existing method, no special measuring device is required, the investment is less, the operation is simple, operators do not need to have special background, and the method can be widely applied to ice run daily hydrologic monitoring of a hydrologic station.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a method for measuring the flow speed of the Yellow River during the ice flood season. Background technique [0002] The Yellow River is the river with the most frequent ice floods in my country, and the Ningmeng River section is the most serious, which is determined by its special geographical location, hydrometeorological conditions and river channel characteristics. Therefore, it is of great significance to accurately predict the closure and opening dates of the river section and the possible location of ice-blocked ice dams. For a long time, scholars at home and abroad have also carried out a lot of research on the above-mentioned problems, especially in the use of numerical simulation technology and artificial intelligence algorithms for ice forecasting, which has made significant progress. However, through research, it has been found that the ice regi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/18
Inventor 徐路凯邓宇李书霞于国卿张彬岳瑜素李建军曾贺张晓华张丙夺郭晓明谢志刚李宏伟石标钦李沛霖吴玄张宝森田治宗吴幸华马子普
Owner YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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