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

A technology of borehole radar and imaging method, which is applied in the field of high-efficiency imaging of multi-input and multiple-output borehole radar based on high degree of freedom, can solve the problem of not considering the variable transceiver spacing and restrict the application of the multi-input and multiple-output borehole radar system , poor positioning accuracy, etc.
CN109085584BActive Publication Date: 2021-04-20UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2021-04-20

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Abstract

The invention discloses a high-efficiency imaging method for multi-input multi-output drilling radar based on high degree of freedom. The method completes the sampling space in the high-degree-of-freedom sampling data matrix by improving the imaging degree of freedom of multi-input multi-output drilling radar sampling data The conversion to the target space realizes high-efficiency and high-precision imaging of the multi-input multi-output drilling radar sampling data; Influence, use fast Fourier transform to obtain the frequency wavenumber spectrum of the sampling data in the expanded high-degree-of-freedom sampling space, and bridge the sampling space and the target space to obtain the imaging results of the target space, and realize the sampling of multi-input and multi-output drilling radar High-efficiency and high-precision imaging of data enhances the application value of multi-input and multi-output drilling radar in practical engineering.
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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...

Claims

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