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SAR differential tomography method and device

An algorithm and matrix technology, applied in the field of SAR differential analysis methods and devices, can solve problems such as large amount of calculation

Inactive Publication Date: 2019-05-31
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] The present invention provides a SAR differential analysis method and device to solve the problem of large amount of calculation faced when extracting the height and deformation rate of the iron tower in the prior art

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  • SAR differential tomography method and device

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Embodiment Construction

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0031] In the following description, a lot of specific details have been set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways that are different from the description again, and those skilled in the art can do similar By extension, the present invention is therefore not limited to the specific examples disclosed below.

[0032] see figure 1 , figure 1 It is a flow chart of a SAR differential a...

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Abstract

The invention discloses a SAR differential tomography method and device. An iron tower is observed by using a radar to obtain an original echo of a tower SAR; distance and azimuth compression is carried out on the original echo to obtain observation matrixes on a plurality of SAR images; the observation matrixes are decomposed into a height matrix and a deformation velocity matrix; on the basis ofa two-dimensional sparse reconstruction algorithm, two-dimensional information sparse reconstruction is carried out on the height matrix and the deformation velocity matrix respectively to obtain a reconstructed height matrix and a reconstructed deformation velocity matrix; and strong scattering point information of the tower is obtained based on the reconstructed height matrix and the reconstructed deformation velocity matrix. According to the invention, the original echo of the tower SAR is processed, the height matrix and the deformation speed matrix are reconstructed by combining the two-dimensional sparse reconstruction algorithm, and then the strong scattering point information of the tower is obtained. Therefore, a problem of the large computing load for the iron tower height and deformation rate extraction in the prior art is solved; and the practical progress of the satellite remote sensing technology in the transmission line tower deformation monitoring is promoted.

Description

technical field [0001] The invention relates to the technical field of analysis and measurement control, in particular to a SAR differential analysis method and device. Background technique [0002] The transmission tower is an important part of the transmission line, and its operation status determines the stability and safety of the power system. Therefore, it is necessary to efficiently monitor the 3D image information of the transmission tower in real time, evaluate its stability, and carry out early warning and disposal. Although the traditional Synthetic Aperture Radar (SAR) technology can monitor the target all-weather and all-weather without being restricted by cloud, fog, rain and snow, etc. Due to the superposition of scattering coefficients, there are problems of cylindrical symmetry blur and overlapping, which cause great difficulties in the identification and extraction of targets. In addition, the traditional SAR technology needs to obtain the real phase thro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
Inventor 聂鼎黄然周仿荣赵现平沈志方明马仪
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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