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Landslide body change detection method based on laser radar technology

A lidar, change detection technology, applied in measurement devices, electromagnetic wave re-radiation, radio wave measurement systems, etc.

Active Publication Date: 2016-01-13
宁波市交通建设工程试验检测中心有限公司
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Problems solved by technology

For example, the traditional geodetic survey method and GPS monitoring point layout are point-based detection methods, and it is difficult to obtain spatial information
As a high-precision monitoring technology for surface deformation, InSAR technology is prone to phase loss correlation when the surface undulation is large, thus affecting the calculation accuracy.

Method used

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  • Landslide body change detection method based on laser radar technology
  • Landslide body change detection method based on laser radar technology
  • Landslide body change detection method based on laser radar technology

Examples

Experimental program
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Effect test

Embodiment

[0067] Taking the landslide of a large open-pit mine in China from 2013 to 2014 as an example, this research method was used to detect the change of the landslide body (including rock slope, soil slope, dangerous rock and rolling stone).

[0068] A) Preprocessing of lidar point cloud data: preprocessing of two phases of landslide body point cloud data obtained by ground laser scanning, preprocessing is mainly to deal with some flying points and noise points in the scanning data, and according to the method of curvature analysis Resampling of the point cloud. While obtaining the point cloud data of the landslide body, the ground laser scanning will also scan other ground objects outside the landslide area. These ground objects outside the landslide body will interfere with the analysis of the landslide body. Resampling The purpose of this method is to ensure that the size of landslide point cloud data is small enough, so that the speed of calculation can be guaranteed, but it is...

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Abstract

The present invention discloses a landslide body change detection method based on a laser radar. According to the method, in a landslide disaster, especially for the change detection of a landslide body at a complex terrain, the change of position and attitude of the landslide body at a certain time period is detected automatically, once the change of a potential landslide body is detected and a change range is outlined, the field staff is reminded to pay attention and take safety measures or leave a danger zone. The method has the advantages of low cost, easy operation, fast computing, high accuracy and convenient detection, a scientific basis is provided for landslide disaster monitoring and evaluation, the security is provided for natural disaster rescue, and economic and social benefits are produced.

Description

technical field [0001] The invention relates to the field of landslide monitoring, and relates to a method for detecting changes of landslide bodies based on laser radar technology. Background technique [0002] With the acceleration of economic and social development, the intensification of economic activities, the over-exploitation of natural resources, the sharp increase in population, and the deterioration of the ecological environment, the natural disasters in our country are showing an increasingly serious development trend, and the disaster relief work is facing severe challenges. [0003] Landslide disaster is the sliding phenomenon of slope rock and soil along the usual shear failure surface, and its mechanism is caused by the shear stress on a certain sliding surface exceeding the shear strength of the surface. Southwest China, especially the hilly and mountainous areas in Southwest China, the most basic topographical feature is that there are many mountains, steep...

Claims

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Application Information

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IPC IPC(8): G01S17/88
CPCG01S17/88
Inventor 王植
Owner 宁波市交通建设工程试验检测中心有限公司
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