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Method for extracting hyperbolic signals in ground penetrating radar map by adopting geometric cylinder detection model

A ground penetrating radar, hyperbolic technology, applied in the direction of reflection/re-radiation of radio waves, measurement devices, utilization of re-radiation, etc., can solve the problem of low accuracy, achieve accurate geometric feature extraction of objects, avoid complex steps, simplify The effect of complex steps

Active Publication Date: 2020-06-23
SOUTH CHINA AGRI UNIV
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Problems solved by technology

At present, the analysis of GPR measured data mainly relies on empirical analysis or manual judgment, which is undoubtedly easy to produce detection results with low accuracy

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  • Method for extracting hyperbolic signals in ground penetrating radar map by adopting geometric cylinder detection model
  • Method for extracting hyperbolic signals in ground penetrating radar map by adopting geometric cylinder detection model
  • Method for extracting hyperbolic signals in ground penetrating radar map by adopting geometric cylinder detection model

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Embodiment Construction

[0027] The present invention will be described in further detail below.

[0028] A method for extracting a hyperbolic signal in a ground-penetrating radar spectrum using a geometric cylinder detection model, specifically comprising the following steps:

[0029] In step 1, a solid cylinder is used as the test carrier, assuming that the radius of the cylinder is R, and the diameter is recorded as D. Mark the three-dimensional coordinates of the center of the cylinder in discrete space. Find the vertical axis coordinate of the cylinder center in B-scan.

[0030] Step 2: First, use image processing to analyze and solve the GPR to obtain the coordinates of the hyperbolic vertex of the object, and then convert the origin of the coordinate axes to the world coordinate system ( figure 1 XOY in ). Then get the hyperbolic equation f in the 2-dimensional space in B-scan c (x). First set C(x c ,y c ,z c ) is the three-dimensional coordinates of the center of the cylinder in discre...

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Abstract

The invention relates to a method for extracting hyperbolic signals in a ground penetrating radar map by adopting a geometric cylinder detection model. The method comprises the following steps of mathematically geometrizing a GPR geoelectric model of a ground penetrating radar, and designing an experimental scheme by combining geometric characteristics of a cylinder with a detection rule of the GPR; after mapping parameters are obtained, comparing a hyperbolic equation of echo signals to derive an asymptote equation, and mapping geometrical characteristics of a cylinder into mathematical modelcharacteristics; and finally, calculating a geometric diameter and a soil depth of the cylinder in a GPR map. According to the method, complex steps of GPR inversion are simplified and avoided, electromagnetic wave signal characteristic extraction of a regular object is performed only through a simple geometric model and method, and the method belongs to the ground penetrating radar (GPR) electromagnetic wave signal analysis and hyperbolic curve characteristic extraction technology.

Description

technical field [0001] The invention relates to ground-penetrating radar (GPR) electromagnetic wave signal analysis and hyperbolic feature extraction technology, in particular to a mathematical model and scheme design for geometric cylinder detection in soil. Background technique [0002] GPR detection is widely used in various fields of electromagnetic wave research, especially as a non-destructive testing method, it is often used in the detection of unknown underground objects. In recent years, GPR has shown broad application scenarios for detecting underground structures and characteristics. For high-precision, high-resolution GPR image analysis technology is more refined. At present, the analysis of GPR measured data mainly relies on empirical analysis or manual judgment, which is undoubtedly easy to produce detection results with low accuracy. The qualitative analysis of GPR signals is a difficult research problem at present, especially after the electromagnetic wave ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88G01S13/89G01S7/41
CPCG01S13/885G01S13/89G01S7/41
Inventor 赵祚喜黎源鸿邱志马坤鹏谈婷罗阳帆何振宇
Owner SOUTH CHINA AGRI UNIV