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Ground surface medium parameter inversion method based on single-base measurement

A medium parameter, single-base technology, applied in the direction of measuring devices, measuring electrical variables, measuring dielectric properties, etc., can solve problems such as complex experimental conditions and inaccurate inversion methods

Active Publication Date: 2016-04-06
XIAMEN UNIV
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Problems solved by technology

[0023] The purpose of the present invention is to solve the problem of inaccurate actual inversion method and complicated experimental conditions in the prior art when inversion of soil dielectric constant is used, and to provide a method that can effectively distinguish each interface reflection component and filter non-soil surface reflection signal and other noise signals, improve the estimation accuracy, and facilitate the practical application of a surface medium parameter inversion method based on single-base measurement

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  • Ground surface medium parameter inversion method based on single-base measurement
  • Ground surface medium parameter inversion method based on single-base measurement
  • Ground surface medium parameter inversion method based on single-base measurement

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Embodiment Construction

[0087] The present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0088] see Figure 1~4 , the present invention provides a surface medium parameter inversion method based on single-base measurement, and the specific implementation steps are as follows:

[0089] (1) In the external field environment, the port of the speaker 1 is facing upward in advance, aiming at the sky without obstacles, and using the vector network analyzer 2 to measure the reflected signal of the port of the speaker If the cable is a phase-stable cable, the reflected signal can also be measured in a darkroom environment in advance;

[0090] (2) Aim the horn 1 vertically at the surface of the soil P to be measured, and measure the reflected signal

[0091] (3) Place a flat metal reflector on the surface of the soil to be tested (the metal plate has a certain size to intercept the main energy radiated by the horn antenna beam), and measure the re...

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Abstract

The invention relates to a ground surface medium parameter inversion method based on single-base measurement, and relates to a ground penetrating radar. The method carries out the inversion of the medium parameters and conductivity of the ground surface through employing a measurement result of ground vertical incidence through a single antenna. The method comprises the steps: firstly carrying out testing and obtaining a reflection signal S11 when a single horn antenna vertically irradiates a soil surface or a metal plate based on a vector network analyzer; secondly introducing a Matrix Pencil (matrix beam) algorithm according to the testing result, and carrying out the recognition and separation of reflection signals of different interfaces; thirdly carrying out estimation and extracting a true reflection signal caused by the soil surface or the surface of the metal plate, thereby obtaining the real reflection coefficient of the soil surface. The method can effectively discriminate the reflection components of all interfaces, can filter out non-soil-surface reflection signals and other noise signals, enables the estimation precision to be improved, and is of great significance to the quick and accurate obtaining of the electromagnetic parameters of the soil surface.

Description

technical field [0001] The invention relates to ground-penetrating radar (GPR), in particular to a surface medium parameter inversion method based on single-base measurement. Background technique [0002] The inversion of dielectric parameters of the surface is one of the important applications of GPR (Ground Penetrating Radar). In the past two decades, the inversion of surface parameters has developed into the inversion of multi-band, multi-polarization, and multi-angle surface data. Significant developments have been made in the inversion of surface permittivity and roughness. The dielectric constant of the target reflects the basic characteristics of the medium, and is one of the important parameters studied by microwave remote sensing. It is related to the structure, composition, density and other factors of matter. The methods for measuring dielectric constant mainly include waveguide method, resonant cavity method, space wave method, probe method, etc. [1]. Each mea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/26G01S13/88
CPCG01R27/2617G01R27/2682G01S13/885
Inventor 刘颜回俞子伟张晓瑶姜美伊柳清伙陈忠刘海张谅朱春辉杨晶
Owner XIAMEN UNIV
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