Oceanic internal wave prewarning system and method based on online monitoring data

Abstract

The invention discloses an oceanic internal wave prewarning method based on online monitoring data. The method comprises the following steps: (1) data processing, namely acquiring ocean current flow rates Ft of a point A which is a certain distance from a working platform at different times t and different number of layers l, and successively performing de-noising processing and background flow removing processing on the acquired ocean current flow rates Ft to obtain ocean current flow rates Ft,l''; (2) judging the ocean current flow rates Ft,l'', namely when the ocean current flow rates Ft,l'' meet the conditions of internal waves, judging that the internal waves appear, and when the current flow rates Ft,l'' do not meet the conditions of internal waves, judging that the internal waves do not appear; and (3) if the internal waves appear, outputting internal wave information and alarming at the same time. The invention also discloses a prewarning system employing the method. The scheme is low in cost, and can be used for realizing internal wave monitoring of a fixed point for a long-term continuously, and realizing automatic internal wave judgment and precise pre-warning within 2-8 hours.

Description

technical field [0001] The invention relates to the field of ocean monitoring, in particular to a marine internal wave early warning system and method based on online monitoring data. Background technique [0002] The internal ocean wave is a kind of wave that occurs in the ocean with seawater density stratification. The maximum amplitude occurs inside the seawater, and the wavelength is between several hundred meters to several tens of kilometers, which belongs to the small-scale motion of the ocean. Strong shear flow caused by internal waves is a potential threat to the safety of marine engineering operations such as offshore oil drilling and extraction. The existence of internal waves will also change the propagation characteristics of ocean sound waves, which will seriously affect the sonar function and interfere with the submarine's concealment and monitoring technology. [0003] At present, there are a large number of online monitoring solutions for the observation of...

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Problems solved by technology

The existence of internal waves will also change the propagation characteristics of ocean acoustic waves, which will seriously affect the sonar function and interfere with the concealment and monitoring technology of submarines

[0003] At present, there are a large number of online monitoring solutions for the observation of internal waves, such as the Chinese invention patents with application numbers 201210578674.0, 201110147411.X and 201210551965.0. In addition, there are some methods for measuring ocean internal waves in the existing technology, such as application number 201210578674.0 And the Chinese invention patent of 201110312123.5, but at present, there is a lack of early warning methods and early warning systems for internal waves in the ocean, and it is far from enough to monitor and measure internal waves in the ocean

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