Sea surface anomalous wave detection method and device
A detection method and abnormal wave technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as hazards caused by buildings and difficulties in on-site measurement, and achieve the effect of reducing potential safety hazards
Inactive Publication Date: 2012-02-01
WUHAN UNIV OF TECH
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Problems solved by technology
The on-site measurement of abnormal waves is relatively difficult. In the past, oil platforms were mainly used for wave height monitoring, but abnormal waves caused great harm to structures such as offshore oil drilling platforms. In order to ensure the safety of maritime navigation and offshore platforms, it is necessary to detect abnormal sea waves. Therefore, there is an urgent need for a technology for detecting anomalous waves on the sea surface
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[0025] In order to detect abnormal waves on the sea surface and thereby reduce the hidden dangers of maritime navigation and offshore platform safety, an embodiment of the present invention provides a method for detecting abnormal waves on the sea surface, see figure 1 As shown, including the following steps:
[0026] Step 101: Based on the one-dimensional anomalous wave theory model, use the dual-scale ocean wave principle to construct an environmental sea surface model in which the wave to be detected and the Bragg short wave coexist. When constructing the environmental sea surface model, a sine wave with the same parameters as the wave to be detected is used for simulation. The relevant parameters of the wave to be detected include wave number, wave amplitude, radar frequency, relative permittivity of sea water, etc.
[0027] Step 102: After the wave to be detected is subjected to sine wave decomposition and interpolation, according to the long and short wave nonlinearity princip...
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The invention discloses a sea surface abnormal wave detection method and device. The method comprises the following steps: constructing an environmental sea surface model in which a wave to be detected and a Bragg shortwave coexist; solving the solution of the Bragg shortwave affected by the nonlinear modulation of the wave to be detected; calculating a resolution unit The radar cross section of the wave to be detected and the echo of the environmental sea surface; compare the radar cross section of the wave to be detected with the echo of the environmental sea surface in the resolution unit, if it is determined that the ratio of the radar cross section of the wave to be detected to the echo of the environmental sea surface is less than the threshold, Then it is determined that the wave to be detected is an abnormal wave. The application of the method and the device provided by the invention can detect the abnormal waves on the sea surface, and reduce the potential safety hazards of sea navigation and sea platforms.
Description
Technical field [0001] The invention belongs to the technical field of ocean remote sensing, in particular to a method and device for detecting sea surface anomalous waves. Background technique [0002] In the past two decades, at least 200 super ships over 200 meters in length have disappeared in the sea. Undoubtedly, most of the culprits leading to these accidents are "abnormal waves" (Draper first proposed the concept of abnormal waves), these abnormal waves either have very high wave heights or their waveforms are abnormal. In actual research and application, generally study the wave with limited record length. If the wave height H (distance from trough to crest) of a wave is greater than 2.2 times the effective wave height, it is called an abnormal wave. On-site measurement of abnormal waves is difficult. In the past, oil platforms were mainly used for wave height monitoring, but abnormal waves caused great harm to offshore oil drilling platforms and other structures. In or...
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IPC IPC(8): G01S7/48
Inventor 谢涛陈伟旷海兰
Owner WUHAN UNIV OF TECH