Inversion Method of Surface Medium Parameters Based on Single Base Measurement

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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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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