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Device and method for in-situ real-time observation of seabed sand waves

A real-time observation, in-situ technology, applied in measurement devices, surveying and navigation, open-air water source survey, etc., can solve the problem of repeated measurement, time discontinuity, inability to accurately judge the specific situation of sand wave migration, and inability to realize in-situ observation and other problems, to achieve the effect of saving observation costs and strong reusability

Active Publication Date: 2018-11-02
OCEAN UNIV OF CHINA
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Problems solved by technology

This observation method is simple and easy to implement, but it requires repeated measurements and the time is not continuous, so in-situ observation cannot be realized, and the specific situation of sand wave migration cannot be accurately judged from intermittent data

Method used

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  • Device and method for in-situ real-time observation of seabed sand waves
  • Device and method for in-situ real-time observation of seabed sand waves
  • Device and method for in-situ real-time observation of seabed sand waves

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Embodiment Construction

[0032] As shown in the figure, an in-situ real-time observation device for seabed sand waves is characterized in that it includes a gravity anchor 1, a hydroacoustic releaser group 4 located above the gravity anchor 1 and containing two hydroacoustic releasers used in parallel, located in the water The lower float support 6 above the sound releaser group 4, the upper float support 10 above the lower float support 6, and the main floating body 11 carrying solar cells 9 and satellite communication machines 12 above the upper float support 10, wherein:

[0033] The top of the gravity anchor 1 is provided with a fiber grating floating soil weight sensor 2,

[0034] The outside of the lower float support 6 is provided with a small float that provides part of the buoyancy for the equipment, and a wave and tide meter 5 and a motion reference unit (MRU) three-dimensional attitude sensor 8 are suspended inside,

[0035] The outside of the upper float bracket 10 is provided with a small...

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Abstract

The invention relates to an apparatus and method for the in-situ real-time observation of submarine sand waves. The apparatus includes an observation system and auxiliary devices. The auxiliary devices comprise an auxiliary ship and a hoisting device; the observation system includes a gravity anchor, a fiber grating floating earth weight sensor, a Kevlar cable, an underwater acoustic releaser group, a lower floating ball bracket, a wave and tide gauge, an upper floating ball bracket, an MRU three-dimensional attitude sensor, a satellite communication machine, an imaging sonar, a solar cell anda main floating body. The principle of the apparatus and the method is characterized in that submarine pressure change caused by the migration of the submarine sand waves is observed, the time interval, elevation and wavelength data of two adjacent extreme submarine pressures are analyzed, and the migration rate of the submarine sand waves is calculated. The method includes the following steps: selection of an observation point and a deployment time, system deployment, recovery, and data processing. The apparatus and the method provide a new idea for the in-situ real-time observation of the submarine sand waves, have the characteristics of simple and easy device, long in-situ real-time measurement period and wide applicable water range, and can realize the in-situ real-time long-term observation of the migration of the submarine sand waves.

Description

technical field [0001] The invention relates to an in-situ real-time observation device and method for seabed sand waves, belonging to the technical field of seabed observation and the field of marine engineering geology. Background technique [0002] Submarine sand wave is a type of intermittent submarine geomorphology in which the sandy sediments on the continental shelf are under the action of hydrodynamic forces such as ocean waves and tides. The ridge line is long and narrow perpendicular to the direction of the main current. A large number of facts show that the existence and migration of submarine sand waves have a great impact on the safety of submarine pipelines. The migration of sand waves can easily cause suspension or burial of submarine pipelines, and in more serious cases, it will lead to breakage and failure of submarine pipelines, which affects economic security and Environmental security poses a huge threat, so it is of great significance to observe and stud...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C13/00
Inventor 贾永刚张博文刘晓磊单红仙文明征张少同沈泽中
Owner OCEAN UNIV OF CHINA
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