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Three dimensional displacement monitoring method for strip mine side slope

A displacement monitoring and open-pit mine technology, applied in measuring devices, instruments, optical devices, etc., can solve the problem that the process of converting two-dimensional coordinates of a single image into three-dimensional coordinates of slope points cannot be completed, increasing calculation time, and automatic matching algorithm. The number of matches is reduced, and the calculation steps are simplified, the equipment cost is low, and the operation is simple.

Active Publication Date: 2017-01-11
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

This greatly increases the calculation time, and due to the difference in the angle of view of the images captured by the two cameras, it may greatly reduce the matching number of some image feature point automatic matching algorithms
The above problems can be avoided by using a monocular camera, but in general, the process of converting a single image from two-dimensional coordinates to three-dimensional coordinates of slope points cannot be completed

Method used

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  • Three dimensional displacement monitoring method for strip mine side slope
  • Three dimensional displacement monitoring method for strip mine side slope
  • Three dimensional displacement monitoring method for strip mine side slope

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Embodiment Construction

[0033] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] The present invention proposes a three-dimensional displacement monitoring method for an open-pit mine slope, such as figure 1 shown, including the following steps:

[0035] Step 1: Obtain the point cloud data of the slope area to be monitored in the open-pit mine through a 3D laser scanner, and establish a 3D model of the slope to be monitored based on the point cloud data of the slope area to be monitored.

[0036] In this embodiment, a commercially available high-precision ground 3D laser scanner is selected. In the long-distance mode, the point measurement accuracy is ≤ 8mm. The collected point cloud data of the slope area to be monitored in the open-pit mine is processed through point cloud and 3D modeling The software builds a high-precision 3D model of the slope to be monitored.

[0037] Step 2: The monitoring image images ...

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Abstract

The invention relates to a three dimensional displacement monitoring method for a strip mine side slope. According to the method, a three dimensional laser scanner is used for obtaining point cloud data of a side slope zone to be monitored of a strip mine, a three dimensional model of the side slope zone to be monitored is built, monitoring images of the side slope zone to be monitored are collected in real time via a monocular camera, and side slope monitoring sequence images can be obtained; control points are selected in a scope, covered by the side slope monitoring sequence images, of the side slope zone to be monitored; a direct linear transformation equation for mutual conversion between geodetic coordinates and image pixel two dimension coordinates is determined; an image local characteristic detecting and coupling algorithm is adopted, and matching characteristic points that are monitored in real time in the side slope monitoring sequence images are extracted, displacement of matching characteristic points in a current image and a previous among the side slope monitoring sequence images can be monitored in real time, and two dimension image displacement of the characteristic points in the side slope monitoring sequence images is converted into three dimension displacement of side slope points in a geodetic coordinate system.

Description

technical field [0001] The invention belongs to the technical field of open-pit mine slope monitoring, and in particular relates to a three-dimensional displacement monitoring method for open-pit mine slopes. Background technique [0002] In the process of open-pit mining, slope instability and landslides are one of the common forms of disasters. Among many monitoring methods for slope displacement changes, ground photogrammetry is a new and rapidly developing monitoring method. The ground photogrammetry method uses a digital camera with CCD or CMOS as a photosensitive element to obtain slope images at different times, and then obtains feature points with the same name on the slope images at different times through some manual or automatic methods. The two-dimensional displacement of the image is obtained by changing the position of the feature point with the same name, and finally the two-dimensional displacement of the image is converted into the three-dimensional displac...

Claims

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Application Information

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IPC IPC(8): G01B11/03
CPCG01B11/03
Inventor 孙亚鑫亢建民孙健杨勇王植王勐
Owner ANSTEEL GRP MINING CO LTD
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