Underwater vehicle detecting method based on ship wake and submarine topography internal wave models

Abstract

The invention discloses an underwater vehicle detecting method based on ship wake and submarine topography internal wave models, belongs to crossing fields of remote sensing technology, marine science and physical geography, and aims to provide a new method for detecting, recognizing and positioning underwater vehicle internal wave signals by using a wake internal wave model caused by motion of a sea surface ship and an internal wave model caused by submarine topography as constraints. The wakes and the internal waves caused by the water surface ship can be distinguished by detecting and recognizing the ship, the water surface ship can be detected and positioned by visible light images and infrared images, the internal wave mode caused by the submarine topography is relatively fixed and predictable, and the internal waves caused by an underwater vehicle are weak signals superposed to water surface internal wave signals and topographical internal wave signals; the surface ship is detected, submarine topography internal waves are constructed, interfering internal waves are filtered by the models, the internal waves of the underwater vehicle are highlighted, and then the underwater vehicle is detected and positioned.

Description

Technical field [0001] The invention belongs to the cross field of remote sensing technology, marine science and physical geography, and more specifically, relates to an underwater vehicle detection method based on ship wakes and internal wave models of seabed terrain. Background technique [0002] The contribution of underwater vehicles and underwater fish schools to mankind is very huge. The detection of underwater vehicles and the prediction and positioning of underwater fish schools have always been valued by many countries. Among various detection methods, remote sensing detection technology has unique advantages. It can implement large-scale and periodic monitoring of fixed sea areas, and has always been highly valued by the navies of developed countries. [0003] In terms of SAR remote sensing imaging simulation of ship wakes, there are few published documents abroad, especially the remote sensing detection of submarine internal waves. For the detection of underwater vehicl...

AI Technical Summary

Problems solved by technology

It solves the existing problem of only using the acquired SAR image for detection, but not using the constraint detection and positioning of the moving ship and the internal wave model of the ocean background. The terrain and ocean density stratification will also generate the ocean's own internal wave under the action of disturbance, so the submarine background internal wave model can be established according to the detection of the ship and the submarine terrain and ocean layer density, and the background filter processing of the real SAR image can be performed. , to accurately detect and locate the position of the underwater vehicle

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