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This paper describes the design of a biointeractive AUV that has abilities to monitor schools of fish interactively. In the very large ocean it is very difficult to understand the habits of a swimming fish because the visibility of camera and range of sonar are limited while they swim widely. It is also hard to apply bio-logging techniques to fish because loggers are still large and heavy for them,...
Although underwater vent fields are of great scientific interest, accurate visual mapping is difficult because of the presence of bubble plumes that degrade the accuracy of conventional acoustic positioning systems such as long base line (LBL) and super short base line (SSBL). The authors had proposed a visual mapping method of shallow vent fields with an autonomous underwater vehicle (AUV) equipped...
Real-time accurate positioning is a key technology for autonomous underwater vehicles to perform close-range seafloor observations such as photo mosaicing. This paper proposes a real-time positioning method that realizes robust and drift-free positioning in a local area based on a passive acoustic landmarks set in the environment and a profiling sonar (profiler) mounted on the vehicle. The method...
Although underwater vent areas are scientifically important, precise photo mosaicing of them is for the following reasons still a hard task. Firstly, the visible range is limited by the turbid water and floating particles. Secondly, the conventional acoustic positioning is vulnerable to the bubble plumes of the vent areas. In this paper a navigation method of an autonomous underwater vehicle (AUV)...
To investigate underwater structures such as piles and caissons in harbors, and risers and jackets of deep-sea oilfields by taking visual images, Autonomous Underwater Vehicles (AUV's) have advantages that they have no umbilical cable which may get entangled in the structures and surrounding obstacles. The authors have proposed a navigation method for AUV's to observe such objects using a laser ranging...
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