Method for high-precision reverse time migration imaging based on severe relief surface ground penetrating radar data

A technology of reverse time migration imaging and ground penetrating radar, which is applied to instruments, measuring devices, and using re-radiation to achieve the effect of reducing the interference of low-frequency noise and reducing the effect of dispersion

Inactive Publication Date: 2017-05-24
CHINA UNIV OF GEOSCIENCES (BEIJING)
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a high-precision reverse time migration imaging method based on GPR data with severe undulations

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
  • Method for high-precision reverse time migration imaging based on severe relief surface ground penetrating radar data
  • Method for high-precision reverse time migration imaging based on severe relief surface ground penetrating radar data
  • Method for high-precision reverse time migration imaging based on severe relief surface ground penetrating radar data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0057] Such as figure 1 As shown, a high-precision reverse time migration imaging method based on ground-penetrating radar data with severe fluctuations includes the following steps:

[0058] Step 1): Applying the Poisson equation to generate a body-fitted grid discrete undulating surface model to realize irregular grid division of the undulating surface;

[0059] Step 2): Decoupling from t...

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 relates to a method for high-precision reverse time migration imaging based on severe relief surface ground penetrating radar data. The method comprises the following steps of 1) generating a body-fitted grid discrete relief surface model; 2) decoupling from a Maxwell equation, so as to obtain a Cartesian coordinate system TM (transverse magnetic) wave equation; 3) performing reverse time extrapolation on a receiving wave field in a curvilinear coordinate system from maximum time to zero time; 4) using a sub-wave with setting certain frequency in the curvilinear coordinate system as a forward modeling sub-wave, and performing forward modeling to calculate the positive continuation wave field value at each time; 5) repeating the steps 3) and 4) on the whole profile, removing the low-frequency interference, and finally superposing, so as to obtain the complete migration profile. The method has the advantages that the frequency dispersion effect caused by the step grid at the relief surface in the Cartesian coordinate system is decreased, the interference by the low-frequency noise in the reverse time migration imaging process is favorably reduced, the reflective wave and diffracted wave in the ground penetrating radar data at the relief surface are accurately migrated and regressed, and the underground structure information is truly reflected.

Description

technical field [0001] The invention belongs to the technical field of shallow surface geological structure detection and engineering survey, and in particular relates to a high-precision reverse time migration imaging method based on ground-penetrating radar data of violently undulating surface. Background technique [0002] Aiming at problems such as oblique reflection and diffraction in ground-penetrating radar data of undulating surface areas, the undulating terrain migration method is usually used to improve the ground-penetrating radar profile and improve the resolution of migration imaging, which is used to truly and reliably identify shallow surface subsurface structures (Structure. The reverse time migration method of Cartesian coordinate system undulating surface proposed by the predecessors failed to completely solve the problem of reverse time migration imaging of ground penetrating radar data on violently undulating surface, which seriously affected the identifi...

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
IPC IPC(8): G01S13/89
CPCG01S13/885G01S13/89
Inventor 鲁兴林钱荣毅刘雅琼宋翱
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap