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Method for observing three-dimensional deformation of side slope by utilizing circular marking points

A circular mark, three-dimensional deformation technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of low efficiency, high cost, low detection accuracy, etc., achieve good observation effect, reduce manpower and material resources and time. the effect of the input

Inactive Publication Date: 2015-04-08
DALIAN UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0003] Traditional slope monitoring methods, such as displacement meters, inclinometers, and manual observation, all have shortcomings such as low efficiency, high cost, and low detection accuracy to a certain extent due to limitations in technology and conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] (1) Use a 1mm diameter sieve to screen the river sand, use the river sand to build a slope model, and measure the height, lower side length, upper side length, and width of the built side slope model as follows: 25.4cm, 60.8cm, 28.9cm, 18.5cm.

[0021] (2) Mark 15*15 circular marking points on the slope surface of the above-mentioned slope model, and the interval between adjacent points is 1cm.

[0022] (3) A binocular vision system is set up in the direction facing the slope surface of the slope model, and the distance between the dual cameras is about 1.5m from the lower edge of the model.

[0023] (4) Before testing, use the black and white calibration board to calibrate the two cameras in the binocular vision system. First use the single-camera calibration method of the MATLAB camera calibration toolbox to calibrate the two cameras separately, and then use the OpenCV camera calibration based on VS2010 to perform stereo calibration on the two separately calibrated cameras....

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Abstract

The invention belongs to the technical field of geotechnical engineering monitoring, relates to a method for observing the three-dimensional deformation of a side slope by utilizing circular marking points, and aims to provide a more convenient and effective side slope deformation monitoring method. A two-camera visual system is put forwards, and the three-dimensional deformation of the side slope is observed by marking circular feature points. A series of regular circular feature points marked on a slope of the side slope are shot in real time to obtain two-dimensional coordinates of all the marking points at every moment, and then the two-dimensional coordinates are matched in pairs to obtain three-dimensional space coordinates through a program. Therefore, the three-dimensional information of surface soil of the side slope can be obtained to realize displacement observation. According to the method, the circular marking points are creatively combined with the two-camera visual system, and the deformation of a surface layer of the side slope can be observed only by the simple marking of the circular points, the two-camera visual system and an image processing computer, so that the labor, material resource and time input of conventional methods is greatly reduced, and good and direct observation effects are achieved.

Description

Technical field [0001] The invention belongs to the technical field of geotechnical engineering monitoring, and particularly relates to a method for observing the three-dimensional deformation of a side slope by using circular marking points. Background technique [0002] In actual engineering, when monitoring the stability of the slope, the surface deformation of the slope is the most significant point that characterizes the change in the slope state. If the displacement of the slope can be accurately monitored and the deformation trend of the slope can be predicted, relevant measures can be taken as soon as possible, which will greatly reduce the harm caused by problems such as slope sliding. [0003] Traditional slope monitoring methods, such as displacement meters, inclinometers, manual observations, etc., have disadvantages such as low efficiency, high cost, and low detection accuracy due to technical and conditional limitations. With the increasing improvement of computer im...

Claims

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Application Information

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IPC IPC(8): G01B11/16
Inventor 于绅坤赵红华杜海常艳雷振坤
Owner DALIAN UNIV OF TECH
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