Two-parameter synchronous inversion method for three-dimensional frequency domain ground penetrating radar

A ground-penetrating radar and frequency-domain technology, applied in the field of three-dimensional frequency-domain ground-penetrating radar dual-parameter synchronous inversion, can solve problems such as unguaranteed and unstable inversion convergence

Pending Publication Date: 2022-01-25
CENT SOUTH UNIV +2
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Watson uses an approximate total variation regularization to constrain the permittivity model so that its inversion results have a sharp interface. This approximate total variation method may be unstable and the convergence of the inversion cannot be guaranteed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Two-parameter synchronous inversion method for three-dimensional frequency domain ground penetrating radar
  • Two-parameter synchronous inversion method for three-dimensional frequency domain ground penetrating radar
  • Two-parameter synchronous inversion method for three-dimensional frequency domain ground penetrating radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0071] like figure 1 It is a schematic flow chart of the method of the present invention: this three-dimensional frequency domain GPR dual-parameter synchronous inversion method provided by the present invention comprises the following steps:

[0072] S1. Input observation data, set 3D initial model, and initialize parameters;

[0073] S2. Forward modeling of the established 3D initial model;

[0074] S3. Construct the inversion objective function and decompose it into two alternate sub-problems, including sub-problem 1 and sub-problem 2. Sub-problem 1 is to solve the model medium parameter vector, and sub-problem 2 is to solve the leading model vector;

[0075] S4. Initialize the permittivity and conductivity to obtain the initial leader model vector;

[0076] S5. Solve sub-problem 1 according to the pilot model vector, and update the model medium parameter vector;

[0077] S6. Solve sub-problem 2 according to the obtained model medium parameter vector, and update the lead...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a two-parameter synchronous inversion method for a three-dimensional frequency domain ground penetrating radar. The method comprises the steps: inputting observation data, setting a three-dimensional initial model, and initializing parameters; performing forward modeling on the established three-dimensional initial model; constructing an inversion objective function, and decomposing the inversion objective function into two alternate sub-problems; initializing the dielectric constant and the conductivity to obtain an initial pilot model vector; solving a sub-problem 1 according to the pilot model vector, and updating a model medium parameter vector; solving a sub-problem 2 according to the obtained model medium parameter vector, and updating a pilot model vector; and updating synchronously and alternately until an inversion termination condition is met, and outputting an inversion result. According to the invention, the dielectric constant and the conductivity value can be updated synchronously, so that the inversion efficiency is improved; a total variation model constraint method is improved to a full waveform inversion process, and the robustness of an algorithm is increased; and a frequency weight factor is combined, and a parallel mode is adopted to realize 3D GPR quantitative imaging, so that the imaging process is more efficient and accurate.

Description

technical field [0001] The invention belongs to the field of geophysical detection, and in particular relates to a two-parameter synchronous inversion method of a ground-penetrating radar in a three-dimensional frequency domain. Background technique [0002] Ground penetrating radar (GPR) is an electromagnetic non-destructive detection technology for locating underground abnormal bodies, structures and characteristics, or invisible targets inside objects. In the actual GPR detection, the position, size and size of the detection target can be roughly inferred only by the obtained radar profile. However, bottom-penetrating radar is mostly limited to rough estimates, and it is still unable to give parameters such as permittivity and electrical conductivity of abnormal objects to achieve precise definition of target object attributes. Full waveform inversion (FWI) is a new and important imaging method. GPR full waveform inversion can obtain physical parameters such as dielectr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S13/88
CPCG01S7/41G01S13/885
Inventor 王珣冯德山杨军赵明哲刘硕袁忠明柳杰
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products