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- Category: Articles
- Details
- Category: Articles
SeaVision, Three-Dimensional Underwater Laser Imaging System
In recent years, three-dimensional (3D) imaging sensors have increased in popularity as a tool for surface-based structural integrity assessment. These sensors provide 3D volumetric information that can be compared against baseline models for the detection of structural defects. Kraken’s SeaVision is a subsea high resolution full colour laser imaging sensor that transfers these capabilities to the subsea domain. With the deployment of offshore wind set to almost triple in the next 10 years, the need for innovative and low-risk solutions to inspect assets is crucial. Traditional inspection regimes need to be enriched with full 3D digitalisation of the inspected subsea structure. Cloud enabled four-dimensional (4D) data analytics, which track the development of the asset over time, are a step forward towards more cost-effective subsea asset management.
By Patrick Merz Paranhos and Jakob Schwendner, Kraken Robotik, Germany
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Power Curve Verification Using Ground-Based and Nacelle-Mounted Remote Sensing Devices
A power curve measurement using remote sensing technology was performed in Uruguay after previous measurements had been completed by an independent laboratory, and the results showed that the measured power curve was considerably below the advertised one. The classification procedure of the ground-based lidar and the power curve results according to the IEC 61400-12-1 Ed. 2 standard are presented in this work.
By Andres Guggeri and Vasilii Netesov, Ventus Energía, Uruguay
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Using Interfering Sound Waves for Monopile Investigation
Offshore wind farm operators face a challenge when trying to establish the integrity of the monopile-transition piece interface which has been used in 80% of turbines constructed before 2012. A key focus is the layer of grout which bonds the two steel sections of the structure, the integrity of which could affect the turbine’s long-term stability. Uniper Technologies, working with a team from the British Geological Survey, has developed a system, the first of its kind, which uses interfering sound waves to investigate the monopile-transition piece underwater and highlight any areas of defective or missing grout. The system, which has been successfully trialled at sea, was a winner of the recent Subsea Inspection competition organised by the Carbon Trust’s Offshore Wind Accelerator. Importantly the technique can inspect the structure from a single surface and within the tight timescales required for offshore procedures. Inspection data is interpreted and shared in a transparent format.
By Dr Colin Brett, Head of Inspection, Uniper Technologies, UK
