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Method for correcting environmental influences at slope deformation monitoring on the basis of corner reflector

A corner reflector and monitoring environment technology, applied in the direction of radio wave reflection/re-radiation, instruments, measuring devices, etc., can solve the problems of large data volume and complex data processing, and achieve high correlation effect

Inactive Publication Date: 2015-12-23
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] ①PS technology can solve the problem of space-time decorrelation and atmospheric effect at the same time, but requires a large amount of data and complex data processing, and is only suitable for small-scale areas with smooth spatial changes and continuous deformation, etc.
[0006] ②The existing atmospheric refraction model correction method simply regards the atmospheric changes on the propagation path as uniform, which is only suitable for small-area and short-distance observations

Method used

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  • Method for correcting environmental influences at slope deformation monitoring on the basis of corner reflector
  • Method for correcting environmental influences at slope deformation monitoring on the basis of corner reflector
  • Method for correcting environmental influences at slope deformation monitoring on the basis of corner reflector

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Embodiment 1

[0057] In order to further verify the feasibility of the model, the model was used to correct the environmental impact of the IBIS-L system monitoring, and the corrected results were compared with the TM30 total station monitoring results. The experiment was carried out at the Nuozhadu Hydropower Station. TM30 monitoring needs to establish observation piers on the slope as monitoring points. According to the existing observation piers, three monitoring points are selected on the slope for comparative analysis. The three monitoring points are evenly distributed on the slope. Since TM30 monitors three-dimensional displacement, the IBIS-L system can only monitor the displacement in the direction of the radar line of sight, and projection transformation is required. First use TM3O to measure the midpoint coordinates of the radar instrument, subtract the midpoint coordinates of the radar instrument from the coordinates of the target point, and obtain the vector of the radar line of ...

Embodiment 2

[0077] Such as figure 1 As shown, the method of correcting the environmental impact of slope deformation monitoring based on corner reflectors, the specific steps are as follows:

[0078] Step 1. According to the previous observation data, select a stable location, conduct on-site surveys, and place corner reflectors. The corner reflections appear red on the radar SNR image. After comparing the images before and after placement, identify the angles of all corner reflectors on the radar image. location, and record its geometric location, estimated SNR, thermal SNR, and correlation information;

[0079] Step 2. Perform calibration, focusing, interference and differential processing on the radar monitoring data of the corner reflector and the target point obtained in step 1 to obtain the displacement value of the corner reflector and the target point, and the displacement value of the target point ,in is the displacement caused by the environment of the target point, is the...

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Abstract

The present invention relates to a method for correcting environmental influences at slope deformation monitoring on the basis of a corner reflector belonging to the technical field of ground-based radar monitoring. The method includes the steps as follows: performing calibrating, focusing, interfering and difference handling for radar monitoring data of the corner reflector and a target point so as to acquire displacement values of the corner reflector and the target point; acquiring a Voronoi diagram according to a Thiessen polygon rule; acquiring a geometric position relationship of the target point and the corner reflector point closest the target point; subtracting the acquired displacement of the corner reflector closest the target point according to the acquired displacement of the target point; performing environmental influence correction for the target point by utilizing single corner reflector so as to acquire the effective displacement of the target point; performing weight configuration according to the geometric position relationship of the corner reflector point and the target point when a great error exists after the correction of the single corner reflector; and performing environmental influence correction by utilizing a manner of weighted average of the corner reflectors. The method can efficiently correct environmental influences by combining the ground-based radar interferometry principle with the Thiessen polygon rule.

Description

technical field [0001] The invention relates to a method for correcting the environmental impact of slope deformation monitoring based on a corner reflector, and belongs to the technical field of ground radar monitoring. Background technique [0002] Conventional monitoring techniques, such as inclinometers, extensometers, GPS, or topographic surveys, only provide displacement information at a limited number of points in the landslide area, while ground-based synthetic aperture radar interferometry has proven its ability to monitor surface displacement and is widely used in glaciers. , volcano and other landslide monitoring and disaster warning. In addition, since the ground radar interferometry technology is not affected by illumination and weather conditions, it makes up for the lack of high accuracy of spaceborne radars affected by the parameters of the platform and satellites, and can generate high-precision digital elevation models. Ground radar uses step-frequency mic...

Claims

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Application Information

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IPC IPC(8): G01S13/90G01S7/40
CPCG01S7/40G01S13/9023
Inventor 左小清余红楚
Owner KUNMING UNIV OF SCI & TECH
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