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Alfredo Martins
Researcher at Instituto Superior de Engenharia do Porto
Publications - 110
Citations - 1237
Alfredo Martins is an academic researcher from Instituto Superior de Engenharia do Porto. The author has contributed to research in topics: Remotely operated underwater vehicle & Search and rescue. The author has an hindex of 16, co-authored 106 publications receiving 1026 citations. Previous affiliations of Alfredo Martins include Faculdade de Engenharia da Universidade do Porto & International Student Exchange Programs.
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Proceedings ArticleDOI
Autonomous bathymetry for risk assessment with ROAZ robotic surface vehicle
Hugo Ferreira,Carlos Almeida,Alfredo Martins,José Almeida,Nuno Dias,André Dias,Eduardo Silva +6 more
TL;DR: In this article, the use of robotic systems for risk assessment is validated through several missions performed either in river scenario (in very shallow water conditions) and in marine coastlines, where the ROAZ is an ocean capable catamaran.
Proceedings ArticleDOI
Development and implementation of a low-cost LBL navigation system for an AUV
TL;DR: This work addresses the main issues involved in the implementation of a long baseline (LBL) navigation system for a REMUS AUV, which replaces both the original hardware and software with a simpler, faster, less expensive and more precise system, based on a Kalman filter.
Proceedings ArticleDOI
Radar based collision detection developments on USV ROAZ II
Carlos Almeida,Tiago Franco,Hugo Ferreira,Alfredo Martins,Ricardo Santos,José Almeida,João Carvalho,Eduardo Silva +7 more
TL;DR: In this paper, the authors present the integration of obstacle detection and analysis capabilities in a coherent and advanced C&C framework allowing mixed-mode control in unmanned surface systems, and the collision avoidance work has been successfully integrated in an operational autonomous surface vehicle and demonstrated in real operational conditions.
Proceedings ArticleDOI
Autonomous Surface Vehicle Docking Manoeuvre with Visual Information
Alfredo Martins,José Almeida,Hugo Ferreira,Hugo Silva,Nuno Dias,André Dias,Carlos Almeida,Eduardo Silva +7 more
TL;DR: The system implemented in the autonomous surface vehicle ROAZ, developed by LSA-ISEP to perform missions in river environment, test autonomous AUV docking capabilities and multiple AUV/ASV coordinated missions is presented.
Proceedings ArticleDOI
SWORDFISH: an Autonomous Surface Vehicle for Network Centric Operations
Hugo Ferreira,Ricardo Martins,Eduardo R. B. Marques,Jose Pinto,Alfredo Martins,José Almeida,João Borges de Sousa,Eduardo Silva +7 more
TL;DR: In this paper, the design and development of the swordfish autonomous surface vehicle (ASV) system is discussed, which is an ocean capable 4.5 m long catamaran designed for network centric operations (with ocean and air going vehicles and human operators).