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Offshore water depth measurement method and device based on novel high-order dispersion relationship

A technology of dispersion relation and measurement method, which is applied in the direction of measuring device, open-air water source survey, and measuring the depth of open-air water source, etc., can solve the problems that the accuracy is difficult to be fully guaranteed, and the topographical characteristics of the sand bar area cannot be detected, etc., to achieve low cost, Elimination of disadvantages and risks, easy operation and secret effect

Active Publication Date: 2019-07-30
OCEAN UNIV OF CHINA
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Problems solved by technology

More specifically, in the sand bar area, due to its rapid morphological changes and high spatial variability causing nonlinear problems on the seafloor, using the linear dispersion relationship, the topographic features of the sand bar area cannot be detected, resulting in large errors
Therefore, when the U.S. Navy uses the dispersion relationship to calculate the depth of offshore waters, there are still many shortcomings, and its accuracy is difficult to fully guarantee

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  • Offshore water depth measurement method and device based on novel high-order dispersion relationship
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  • Offshore water depth measurement method and device based on novel high-order dispersion relationship

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[0062] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0063] An embodiment of the present invention provides an iterative calculation method for offshore water depth based on high-order dispersion relations, referring to figure 1 shown, including:

[0064] A. Obtain digital images or video images of time-space sequence of surface waves in the target sea area;

[0065] Data collected from unmanned aerial systems can be used, but other data such as radar, remote sensing, etc. can also ...

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Abstract

The invention discloses an offshore water depth measurement method and device based on a novel high-order dispersion relationship. Different from the traditional water depth measurement technology, the method comprises the following steps: obtaining a time-space sequence digital image or video image of a surface wave of a target sea area; performing maximum total coherence frequency band processing on the image so as to generate corresponding frequency and a wave number pair on each calculation point, and substituting the frequency and the wave number pair into a high-order dispersion relationship wave model; and outputting a water depth value of a target sea area via iterative computation. By adoption of the offshore water depth measurement method and device disclosed by the invention, the water depth measurement cost is greatly reduced, the drawbacks and risks of the traditional marine hydrological measurement are eliminated, the requirements for continuous real-time updating of water depth information can be met, and the working efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of water depth measurement, in particular to a method and device for measuring offshore water depth based on a novel high-order dispersion relationship. Background technique [0002] Ocean bathymetry is of great significance to the national military deployment. The sea area, especially the coastal area, is the main area for the military power planning and military facility construction of a sovereign country, and is a vital coverage area for national defense forces. However, the deployment of military power The laying of military facilities is largely limited by the water depth. For example, warships must be above a certain water depth to operate normally, and submarines also need to be in deeper sea areas to complete their stealth missions. The laying of military cables is closely related to the water depth, so the water depth is many The first detection target of marine national defense. [0003] When the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C13/00G06F17/11G06F17/14G06F17/15
CPCG01C13/008G06F17/11G06F17/14G06F17/15
Inventor 张黎邦李华军梁丙臣葛洪丽高伟张嶔张其一冯海暴刘浩
Owner OCEAN UNIV OF CHINA
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