Dike dam riprap density measuring method based on image analysis

A technology of image processing and density measurement, applied in the direction of analyzing materials, measuring devices, specific gravity measurement, etc., can solve problems such as difficult layout, and achieve the effects of saving engineering funds, low cost, and reliable results

Inactive Publication Date: 2013-01-09
CHINA MCC17 GRP
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Problems solved by technology

Chinese patent CN1165292A proposes an additional mass method for measuring the density of rockfill bodies. Some scholars have proposed the method of obtaining the density of rockfill bodies by digital measuring boards based on the additional mass method, but these methods are still based on the test pit method. basis, and thus have the disadvantages of direct measurement methods of the first type
On the other hand, due to the large particle size, even if the surface of the riprap is leveled, the surface is still not smooth, which makes it difficult to arrange the instruments in the general method on the surface of the riprap.

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  • Dike dam riprap density measuring method based on image analysis
  • Dike dam riprap density measuring method based on image analysis

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Embodiment Construction

[0026] A method for measuring the density of embankment riprap based on image processing and analysis. First, take a two-dimensional image of the leveled riprap accumulation, process the two-dimensional image in black and white, and calculate its two-dimensional surface density through image analysis. The three-dimensional reconstruction stereological analysis method calculates the volume density of the riprap body according to the surface density, and the specific steps are as follows:

[0027] 1. Calculation of two-dimensional surface density of riprap

[0028] 1) After the rock dumping is completed, level the surface of the rock dumping body.

[0029] 2) Use a high-pixel camera to shoot down the leveled riprap body, and determine the number of pictures that need to be taken according to the shooting height and the size of the riprap area. If the size range of the riprap plane is not large, you can take a picture as a whole. If the shooting range is large, in order to ensu...

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Abstract

The invention provides a dike dam riprap density measuring method based on image analysis, and the method is characterized in that a two-dimensional image of a riprap accumulation body after being leveled is photographed, a gray processing intermittency detection segmentation technology is adopted for processing the two-dimensional image, the two-dimensional density of the riprap is calculated through the image analysis, and the density of a three-dimensional body of the riprap is calculated by analyzing the two-dimensional density. Due to the adoption of the method, the density of the riprap with the granularity being more than that of an ordinary stone and the density of the riprap with the rough surface difficultly placed with an instrument can be measured, the damage to the riprap dam can be avoided by utilizing the image analysis method, a real nondestructive measurement method is realized, the test cost is low, engineering expense can be saved, and the method can be popularized and used in the dike dam riprap projects.

Description

technical field [0001] The invention relates to a method for calculating the density of riprap piles, in particular to a method for measuring the density of riprap in embankment construction based on image processing. Background technique [0002] In the embankment engineering, riprap construction is a common method, and the density of riprap is the key to ensure the safety of embankment and an important parameter index to control the quality of the project. Different from the natural nature of the gradation of rockfill materials in general rockfill dams, there are generally certain requirements for the size and gradation of stones in embankment riprap construction. The particle size of stones is larger than that of general rockfill dams. Probably around 0.3m to 0.8m. Density determination of riprap construction has always been a problem that has not been well resolved in the engineering field. For the determination of general rockfill density, there are two commonly used ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/00
Inventor 赵学亮谢兰敏余华春陶家长倪淑梅
Owner CHINA MCC17 GRP
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