Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Layered medium waveform inversion method based on simulation annealing algorithm

A simulated annealing algorithm and waveform inversion technology, which is used in the reflection/re-radiation of radio waves, radio wave measurement systems, and the use of re-radiation. Achieve the effect of improving inversion efficiency, reducing parameters, and enhancing adaptability

Active Publication Date: 2017-03-29
GUILIN UNIV OF ELECTRONIC TECH
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing waveform inversion methods for layered media have shortcomings such as inability to identify thin-layer media, high complexity, slow convergence speed, and low efficiency.

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
  • Layered medium waveform inversion method based on simulation annealing algorithm
  • Layered medium waveform inversion method based on simulation annealing algorithm
  • Layered medium waveform inversion method based on simulation annealing algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] A waveform inversion method for layered media based on a simulated annealing algorithm, comprising the following steps:

[0040] 1) if figure 1 The underground layered medium model is constructed as shown, and the constructed model is detected by ground penetrating radar, and the original echo signal is processed by the matched filtering method to obtain the actual echo signal;

[0041] 2) Extract the two-way time delay information from the actual echo signal, set the loop control variable, initialize the estimated value of the dielectric constant of each layer of medium, and then obtain the estimated thickness of each layer of medium according to the two-way time delay information and the wave velocity formula;

[0042] 3) Use the estimated parameter values ​​to carry out forward modeling on the constructed model to obtain the simulated echo signal, and obtain the error between the actual echo signal and the simulated echo signal according to the error formula;

[004...

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 layered medium waveform inversion method based on a simulation annealing algorithm and brings forward a layered medium waveform inversion method based on a simulation annealing algorithm, for the purposes of reducing the algorithm complexity, improving the convergent speed and enhancing the thin layer identification capability of the method. The method has the following advantages: 1, by use of prior information of a double-pass time delay of electromagnetic waves in each medium layer, parameters of waveform inversion are reduced, the algorithm solving complexity is reduced, and the inversion efficiency is improved; 2, by use of a non-uniform variation idea, through improving a disturbance model of the simulation annealing algorithm, the convergent speed is substantially improved; and 3, through differences between actual echo signals and simulation echo signals, time-delay information covered by strong echoes is extracted, the capability of the algorithm to thin layer medium parameter inversion is enhanced, and the practicality of the algorithm is improved.

Description

technical field [0001] The invention belongs to the technical field of waveform inversion, and in particular relates to a waveform inversion method of a layered medium based on a simulated annealing algorithm. Background technique [0002] Ground Penetrating Radar (GPR) is a non-destructive detection tool widely used in the fields of civil engineering, national defense, archaeology and geological detection. Its basic principle is to obtain the reflected echo due to the inhomogeneity of the underground medium by launching electromagnetic waves into the underground medium. In the practical application of GPR, the waveform inversion method of layered media plays an extremely important role, which can effectively help the detector personnel to obtain the dielectric property information of the near-surface geological structure in the detection area without other prior information and thickness and other parameter information. However, the existing waveform inversion methods for...

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): G01S13/88
CPCG01S13/885
Inventor 欧阳缮吕昌民谢跃雷晋良念刘庆华姚连明李浩然汪瑞李贝贝王鲁豫
Owner GUILIN UNIV OF ELECTRONIC TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com