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Method for measuring water depth of shallow sea based on double-frequency high-frequency ground wave radar

A high-frequency ground wave radar and water depth measurement technology, which is used in measurement devices, open-air water source surveys, mapping and navigation, etc., can solve problems such as the influence of radial flow detection results on the ocean surface, and achieve good accuracy, robustness, and computational complexity. small effect

Inactive Publication Date: 2012-07-04
WUHAN UNIV
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Problems solved by technology

However, in shallow waters, deep water conditions cannot be met, which will affect the detection results of radial flow on the ocean surface

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  • Method for measuring water depth of shallow sea based on double-frequency high-frequency ground wave radar
  • Method for measuring water depth of shallow sea based on double-frequency high-frequency ground wave radar
  • Method for measuring water depth of shallow sea based on double-frequency high-frequency ground wave radar

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Embodiment Construction

[0017] The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0018] The key of the present invention is to construct a new monotone function about the water depth according to the working frequency, and use two frequencies to calculate the water depth of the detection results of the sea surface radial flow at the same position.

[0019] Under deep water conditions, the real sea surface can be decomposed into a superposition of sine wave train components in a manner similar to Fourier transform. For shore-based high frequency surface wave radar, the wavelength Ocean waves equal to half the wavelength of radar waves will produce the strongest backscattering of radio waves. The propagation phase velocity of this series of ocean waves is definite. If the phase velocity is definite, the Doppler frequency shift it produces on electromagnetic waves is definite. Its Doppler frequency shift is called the ...

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Abstract

The invention discloses a method for measuring the water depth of a shallow sea based on a double-frequency high-frequency ground wave radar. According to the method, the water depth of the shallow sea is measured by using the double-frequency high-frequency ground wave radar. Under the condition of shallow water, the water depth influences a sea surface radial flow detection result, and the position of a Bragg peak approaches a zero frequency along with the reduction of the water depth. On the basis of the influence, a new monotone function about the water depth is constructed, and the waterdepth is calculated according to the measurement result of Doppler frequency shift of the sea surface radial flow of the same position by using two working frequencies of the double-frequency high-frequency ground wave radar. The technical scheme provides a new method for detecting the water depth, the double-frequency high-frequency ground wave radar can measure the water depth of the shallow sea during sea dynamic element detection; and the water depth of shallow water with a large area can be detected; and an operation amount is low, and the method is high in accuracy and robustness.

Description

technical field [0001] The invention relates to the field of radar measurement, in particular to a method for measuring shallow water depth by using dual-frequency high-frequency ground wave radar. Background technique [0002] Shallow sea bathymetry is of great significance to shallow sea oil exploration and development, burial of submarine oil pipelines and communication cables, marine transportation and marine fisheries, mariculture, offshore economy and marine rescue. The traditional ocean depth sounding technology is based on the ship as a platform, using sonar technology. Due to the limitation of time and funds, as well as the areas where ships cannot enter, the traditional bathymetry technology is limited to a certain extent in the vast offshore waters. People have been looking for a quick and cheap way to measure shallow water bathymetry. [0003] With the development of remote sensing technology, satellite remote sensing technology, which uses seawater visible lig...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C13/00
Inventor 吴雄斌刘斌李伦徐新安沈志奔陈骁峰
Owner WUHAN UNIV
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