Fine sand settling velocity detection method based on image grey

A technology of image grayscale and settling speed, which is applied in the direction of analyzing materials and instruments, can solve the problems of inconsistent real characteristics of silt, changes in settling characteristics, and few research results, and achieve accurate value, avoid interference, and accurate test results Effect

Inactive Publication Date: 2013-01-02
CHONGQING JIAOTONG UNIVERSITY
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Problems solved by technology

Group settlement is quite different from single-particle settlement, and the interaction between particles and the influence of particle concentration on water flow characteristics need to be considered additionally. Therefore, there are few research results, and the understanding of its laws needs to be further improved, especially in the case of non-uniform silt. During the settlement process, flocculation may occur due to

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  • Fine sand settling velocity detection method based on image grey
  • Fine sand settling velocity detection method based on image grey
  • Fine sand settling velocity detection method based on image grey

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[0047] In specific implementation, a method for detecting the sedimentation velocity of fine sand based on image grayscale includes the following steps:

[0048] a. Obtain a detection device with the following structure. The detection device includes a settlement vessel, a light source, a camera, and a computer. The settlement vessel is made of transparent material and has a rectangular cross section. The light source is located on one side of the settlement vessel and has a height and settlement. The containers are consistent, the camera is located on the other side of the settlement container and is used to collect images of the settlement container, and the computer is connected to the camera;

[0049] b. Carry out gray-concentration calibration. When calibrating, use the above-mentioned detection device to configure the sediment solution of different concentrations in the sedimentation container, stir it evenly, turn on the light source and the camera to collect the image, and u...

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Abstract

The invention discloses a fine sand settling velocity detection method based on image grey. The fine sand settling velocity detection method comprises the following steps of: a, acquiring a detection device consisting of a settling container, a light source, a camera and a computer; b, performing grey-concentration calibration; c, performing image acquisition; d, performing concentration conversion; and e, calculating the settling velocity. The method is special for detecting the settling velocity of the group settlement silt in fine particle wash load type, the instantaneous settling velocity and the mean settling velocity of the sand in a sand river can be detected, and the method has the advantages that operation is easy and testing precision is reliable.

Description

technical field [0001] The invention relates to the field of sedimentation velocity measurement, in particular to a fine sand velocity detection method based on image grayscale. [0002] Background technique [0003] Studying the sedimentation velocity of river sand and then mastering the sedimentation law of river sand is of great significance for dredging of river channels and reservoirs. The traditional research on sedimentation velocity of river sand is generally aimed at the river sand with relatively large particles and the sedimentation velocity is basically evenly sinking. A sedimentation velocity measuring device with automatic measuring function and its method all belong to this category. For the flushing type sediment that is often suspended in the water, it is difficult to settle due to the suspension movement with the water flow, so it is rarely studied. [0004] Modern studies have found that in some large reservoirs and their upstream river sections, a larg...

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Application Information

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IPC IPC(8): G01N15/04
Inventor 李文杰胡江付旭辉杨胜发陈阳张帅帅
Owner CHONGQING JIAOTONG UNIVERSITY
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