Hybrid underwater imaging for the tri-dimensional inspection of critical structural elements in offshore platforms

• Tipo: Artigo em Revista Científica Internacional
• Data: 2024

Autores

Leite, PN (Autor) Outra; Pereira, PN (Autor) Outra; Dionisío, JMM (Autor) Outra; Pinto, AM (Autor) FEUP

Revista

Título: Ocean Engineering

Vol. 314

ISSN: 0029-8018

Editora: Elsevier

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-017-ABM

DOI: 10.1016/j.oceaneng.2024.119658

Abstract (EN): Offshore wind farms face harsh maritime conditions, prompting the use of sacrificial anodes to prevent rapid structural degradation. Regular maintenance and replacement of these elements are vital to ensure ongoing corrosion protection, maintain structural integrity, and optimize efficiency. This article details the design and validation of the MARESye hybrid underwater imaging system, capable of retrieving heterogeneous tri-dimensional information with millimetric precision for the close-range inspection of submerged critical structures. The optical prowess of the system is first validated during low turbidity trials where the volumetric properties of a decommissioned anode are reconstructed with absolute errors down to 0.0008 m, and its spatial dimensions are depicted with sub-millimeter precision accounting for relative errors as low as 0.31%. MARESye is later equipped as payload in a commercial ROV during areal environment inspection mission at the ATLANTIS Coastal Test Center. This experiment sees the sensor provide live reconstructions of a sacrificial anode, revealing a biofouling layer of approximately 0.0130 m thickness. The assessment of the high-fidelity 2D/3D information obtained from the MARESye sensor demonstrates its potential to enhance the situational awareness of underwater vehicles, fostering reliable O&M procedures.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16