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High precision method for measuring height of underwater topography of pile foundation of pile group of offshore wind plant

A technology for underwater terrain and wind farm groups, which is applied in height/horizontal measurement, measuring devices, surveying and navigation, etc., and can solve problems such as inability to reach multi-beam detection signals and incomplete underwater terrain detection of pile foundations.

Active Publication Date: 2018-08-17
上海荟蔚信息科技有限公司 +1
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

Since the cap is equipped with multiple inclined piles, the bottom of the underwater terrain is covered by structures, and the multi-beam detection signal cannot reach, resulting in incomplete detection of the underwater terrain of the pile foundation.

Method used

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  • High precision method for measuring height of underwater topography of pile foundation of pile group of offshore wind plant

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Embodiment 1

[0032] A method for high-precision measurement of underwater terrain elevation of pile group pile foundations in offshore wind farms, comprising:

[0033] Step 1, install and fix the three-dimensional scanning sonar on the remote-controlled unmanned submersible; the remote-controlled unmanned submersible can also be called an underwater robot; the model of the three-dimensional scanning sonar is preferably the commercially available three-dimensional scanning sonar BV5000.

[0034]Step 2, determine the location of the measuring point and the number of measuring points for collecting data.

[0035] The determined measuring points include internal measuring points located between the pile foundations of the offshore wind farm pile group, and several external measuring points located outside the pile foundations. The internal measuring points are located at the center of the pile foundations, and the external measuring points on both sides of the central position between the pile...

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Abstract

The invention discloses a high precision method for measuring the height of underwater topography of pile foundation of a pile group of an offshore wind plant. The method comprises following steps: step one, installing a three dimensional scanning sonar on a remote-controlled unmanned submersible; step two, determining the positions and number of measuring points for data collection; step three, remote-controlling the unmanned submersible with the three dimensional scanning sonar to carry out three dimensional scanning imaging in each measuring point so as to obtain the shape of underwater topography; step four, after detection is finished, recovering the unmanned submersible, and collecting the point cloud data; step five, collecting multi-beam point cloud data by a ship mounted multi-beam system; and step six, superposing the three dimensional scanning sonar and multi-beam point cloud data. The provided method can fill up the data blank of multi-beam scanning, can detect the underwater topography of an offshore wind plant in the east sea, and obtains high precision sludge height data.

Description

technical field [0001] The present invention relates to a method for measuring the silt of group pile foundations of offshore wind farms, in particular to a method for high-precision measurement of underwater terrain elevation of pile group pile foundations of offshore wind farms. Background technique [0002] The environmental conditions of offshore wind farm sites are very complex, and the impact of meteorological and hydrological elements such as wind, waves, and currents on the foundation of wind turbines cannot be ignored. Especially after the infrastructure construction of offshore wind turbines, the movement of water bodies caused by tidal currents and waves will be significantly affected, resulting in an increase in the ability of water to carry sand. If the bed is susceptible to erosion, scour pits will be formed locally on the foundation of the unit, and such scour pits will affect the stability of the foundation. [0003] In coastal engineering, tidal currents ar...

Claims

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Application Information

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IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 吕骥张洪星钱建华
Owner 上海荟蔚信息科技有限公司