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High-efficiency imaging method for multi-input and multi-output borehole radar based on high degree of freedom

A drilling radar and imaging method technology, applied in the high-efficiency imaging field of multi-input and multi-output drilling radar based on high degree of freedom, can solve the problem of restricting the application of multi-input and multi-output drilling radar system, and does not consider the variable sending and receiving distance , Poor positioning accuracy and other issues, to achieve precise target positioning performance, strong practicability, and improve imaging efficiency

Active Publication Date: 2018-12-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, the Stolt migration algorithm also does not consider the variable transceiver spacing of the multi-input multi-output borehole radar, and positioning deviation will occur when dealing with non-single-base radar imaging
[0006] The existing radar imaging algorithm has poor positioning accuracy and low efficiency in the application of multi-input multi-output drilling radar imaging, which restricts the application of multi-input multi-output drilling radar system in actual engineering

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  • High-efficiency imaging method for multi-input and multi-output borehole radar based on high degree of freedom
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  • High-efficiency imaging method for multi-input and multi-output borehole radar based on high degree of freedom

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[0025] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the condition of not conflicting with each other, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0026] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from the scope of this description. Therefore, the protection scope of the present invention is not limited by the following disclosure. limitations of specific examples.

[0027] The object of the present invention is to realize the high degree of freedom of the multi-input multi-output drilling radar sampling data by improving the...

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Abstract

The invention discloses a high-efficiency imaging method for a multi-input and multi-output borehole radar based on high degree of freedom. The method completes transformation from sampling space to target space in the high degree of freedom sampling data matrix by improving imaging freedom of the multi-input and multi-output borehole radar sampling data to realize high-efficiency and high-precision imaging of the multi-input and multi-output borehole radar sampling data. According to the high-efficiency imaging method for the multi-input and multi-output borehole radar based on high degree offreedom, influences of variable spacing of different transceiver elements on the multi-input and multi-output borehole radar are eliminated; frequency wavenumber spectrum of the sampled data in the extended high degree of freedom sampling space is obtained by using express Fourier transform; the sampling space and the target space are bridged to obtain a target space imaging result; high-efficiency and high-precision imaging of multi-input and multi-output borehole radar sampling data is realized and the application value of multi-input and multi-output borehole radar in practical engineeringis improved.

Description

technical field [0001] The invention belongs to the technical field of radar imaging, and relates to a drilling radar target imaging technology, in particular to a high-efficiency imaging method for a multi-input and multi-output drilling radar based on a high degree of freedom. Background technique [0002] Borehole radar imaging technology is one of the key technologies for underground target detection and identification, and has been widely used in the fields of crack and cavity detection, hydrogeology and geological exploration. Compared with optical remote sensing methods, borehole radar imaging technology has all-weather operability and better material penetration. However, due to the complexity of the underground detection environment, monostatic and bistatic borehole radar imaging systems are susceptible to strong clutter interference, and the effective reflection signals of targets are usually submerged by strong clutter signals and cannot be identified. [0003] W...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/89
CPCG01S13/89
Inventor 杨海宁李娜李廷军刘云龙黄昌瑞樊勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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