Underground linear target trend measurement method and system based on polarization ground penetration radar

A linear target, ground penetrating radar technology, used in radio wave measurement systems, measurement devices, reflection/re-radiation of radio waves, etc. problems, to achieve the effect of saving measurement time and labor costs, and enriching the amount of information

Inactive Publication Date: 2019-09-17
GUANGZHOU UNIVERSITY
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  • Abstract
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  • Application Information

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Problems solved by technology

The angle of the underground linear target can be calculated by two parallel survey lines. Although the calculation method is simple, this method greatly increases the data acquisition time, and when multiple linear objects intersect each other underground, it will produce different results. Accurate results, if the site environment is relatively harsh, such as in satellite detection, it is difficult to obtain multiple radar profiles

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  • Underground linear target trend measurement method and system based on polarization ground penetration radar
  • Underground linear target trend measurement method and system based on polarization ground penetration radar
  • Underground linear target trend measurement method and system based on polarization ground penetration radar

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Embodiment

[0055] Such as figure 1 As shown, the present embodiment provides a method for measuring the direction of an underground linear target based on a polarized ground penetrating radar, comprising the following steps:

[0056] S1: if figure 2 As shown, the radar reflection signals of the four channels HH, HV, VH and VV are collected by the polarimetric ground penetrating radar system along the same survey line, and the polarization scattering matrix is ​​extracted:

[0057]

[0058]

[0059] Among them, S HH , S HV , S VH , S VV Represents the target response of the four polarization channels HH, HV, VH and VV, θ represents the angle of Alford rotation, and the superscript T of R represents the transpose. The rotation to each The target response of the linear target in angle;

[0060] S2: Perform Alford rotation on the polarization scattering matrix, that is, perform mathematical rotation on the measurement frame, and extract the target response under the HH polarizat...

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Abstract

The present invention discloses an underground linear target trend measurement method and system based on polarization ground penetration radar. The method comprises following steps: collecting a radar reflection signal of four channels of HH, HV, VH and VV by using a polarization ground penetration radar system, and extracting a polarization scattering matrix; performing Alford rotation on the polarization scattering matrix, and extracting a target response under the HH polarization channel after Alford rotation; conducting derivation to a target response under the HH polarization channel, and finding an angle value when the target response under the HH polarization channel reaches a maximum; and combining a transformation relationship between the target response under the HV polarization channel and a target angle, to expand a range of the angle value, to obtain the underground linear target trend. The method and system adopts the Alford rotation to measure the angle of the linear target, can extract target reflection at any angle between a transmitter and a receiver, and can accurately measure the underground linear target trend and save measurement calculation time.

Description

technical field [0001] The invention relates to the technical field of ground-penetrating radar data measurement, in particular to a method and system for measuring the trend of an underground linear target based on a polarized ground-penetrating radar. Background technique [0002] Due to the wide variety of underground pipelines in the city, including cables for transmitting photoelectric signals, pipelines for water and oil transmission, and intersecting sewer pipelines, etc. Nowadays, many underground pipelines are facing diversion, wrong excavation, aging and other situations. If the specific location and orientation of these underground pipelines cannot be accurately grasped, it may cause fires, water cuts, power outages and other problems that endanger urban safety. cause great distress and inconvenience. Therefore, how to accurately grasp the orientation of underground pipelines is very important. The angle of the underground linear target can be calculated by two ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88G01S13/06G01S7/02
CPCG01S7/024G01S13/06G01S13/885
Inventor 刘海钟景阳陈志杰崔杰刘超童华炜吴会军
Owner GUANGZHOU UNIVERSITY
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