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Ground penetrating radar underground target positioning method

A ground-penetrating radar and target positioning technology, applied in the field of ground-penetrating radar detection, can solve the problems of low positioning accuracy and complex target positioning methods

Inactive Publication Date: 2015-12-23
HENAN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0005] The present invention provides a ground-penetrating radar underground target positioning method, aiming to solve the problem that the target positioning method in the prior art is complicated and the positioning accuracy is not high

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Embodiment Construction

[0037] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] Such as figure 1 As shown, the ground penetrating radar underground target positioning method of the present embodiment includes the following steps:

[0039] 1) Carry out two-dimensional empirical mode decomposition on the detection echo data of the ground penetrating radar, and obtain K two-dimensional empirical mode function components IMF and one residual with decreasing frequencies in turn;

[0040] 2) The mean value of the first M (M≤K) two-dimensional empirical mode function components is used as the characteristic value of the detection echo data;

[0041] 3) Obtaining the extreme point of the eigenvalue of the detection echo data as the estimated value of the apex position of the underground target;

[0042] 4) Estimate the propagation speed of electromagnetic waves in the ground;

[0043] 5) According to the estimated val...

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Abstract

The invention relates to a ground penetrating radar underground target positioning method. The method comprises the steps that 1) two-dimensional empirical mode decomposition is carried out on detection echo data of a ground penetrating radar to acquire K two-dimensional empirical mode function components IMF with orderly descending frequency and a residual; 2) the mean of the first M (M< / =K) two-dimensional empirical mode function components is used as the characteristic value of the detection echo data; 3) the extreme point of the characteristic value of the detection echo data is acquired and is used as the estimation value of the vertex position of an underground target; 4) the underground propagation velocity of an electromagnetic wave is estimated; and 5) according to the estimation value of the vertex position of the underground target and the underground propagation velocity of the electromagnetic wave, a ground penetrating radar hyperbolic mathematical model is used to carry out hyperbolic fitting to position the underground target. According to the method provided by the invention, the target information is completely kept; a clutter suppression effect is improved; and the accuracy of target positioning is improved.

Description

technical field [0001] The invention relates to the field of ground-penetrating radar detection, in particular to a ground-penetrating radar underground target positioning method. Background technique [0002] Ground-penetrating radar is an effective shallow underground target detection technology developed rapidly in recent decades. It is a non-destructive detection method with fast detection speed, high resolution, convenient and flexible operation, and low detection cost. With many advantages, it has been widely used in the detection and positioning of underground targets, such as cavities, pipelines, mines, etc. [0003] The two-dimensional echo data detected by ground penetrating radar is called B-Scan data, which is the data basis for subsequent radar signal processing, target recognition and interpretation, and the ground penetrating radar target positioning technology is also based on B-Scan data. The biggest influence on the accurate positioning of the target is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88G01S7/41
CPCG01S7/41G01S13/885
Inventor 乔丽红秦瑶王其富任笑真廉飞宇杨德梅
Owner HENAN UNIVERSITY OF TECHNOLOGY
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