OBSEA an oceanographic seafloor observatory

Nogueras, Marc; Río, Joaquín Del; Cadena, Javier; Sorribas, Jordi; Artero, Carla; Dañobeitia, Juanjo; Mànuel, A.

doi:10.1109/isie.2010.5637675

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…Finally, a test was performed in real sea conditions near the OBSEA observatory [27] off the coast of Vilanova i la Geltrú, Spain. It is a controlled area in which sea conditions are monitored and measured by an Acoustic Doppler Current Profiler (ADCP).…”

Section: B Tests Performedmentioning

confidence: 99%

Design and Testing of a Kinetic Energy Harvester Embedded Into an Oceanic Drifter

et al. 2020

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A novel Kinetic Energy Harvester (KEH) has been developed for powering oceanic undrogued drifters. It consists on a double pendulum system capable of transforming the wave oscillations into rotation on a flywheel. This rotation is converted into DC current by an electrical generator and further processed by a power management unit (PMU). The PMU includes a "maximum power point tracking" system to maximize energy production by the generator. An oceanic drifter has also been designed to embed the KEH and a custom-made measurement system to perform real sea tests. It counts on an Inertial Measurement Unit to study the motion of the drifter and an embedded measurement system to estimate the rotation speed of the generator and the power at both the input and output of the PMU. A Wi-Fi connection is also included for data transfer at short distances. The generator was firstly characterized at the laboratory; the drifter was then placed on a linear shaker to assess its performance. Finally, the drifter was deployed in a controlled sea area with average values of wave height and frequency of 1.43 m and 0.29 Hz, respectively. In these conditions, the drifter showed horizontal and vertical oscillations with peak-to-peak accelerations of 0.8 g and power spectra centered around 1.5 Hz and 1 Hz, respectively. As a result, the KEH generated a mean output power of 0.18 mW, with peaks of 2.5 mW.

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Section: B Tests Performedmentioning

confidence: 99%

Design and Testing of a Kinetic Energy Harvester Embedded Into an Oceanic Drifter

et al. 2020

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“…Virtual collaboration among groups of researchers from different institutions or different geographic areas is fostered through the sharing of analyses and conclusions in a common web-based workspace [ 39 ]. Network sensors enable real-time access to measurements and the interactive control of remote assets [ 40 ]. An optical Ethernet network manages real-time sensor data acquisition and status monitoring (using an SNMP protocol).…”

Section: Discussionmentioning

confidence: 99%

“…In oceanographic observation, high resolution, large volumes of information and long data series are becoming increasingly important because traditional observation systems (e.g., autonomous buoys and measurements taken from vessels) present serious disadvantages regarding the costs, volume and delayed transmission of data, and face limitations of battery autonomy [ 40 ]. The newer cabled underwater observatories, in contrast, are modular, flexible and adaptable to different uses and specifications.…”

Section: Discussionmentioning

confidence: 99%

The New Seafloor Observatory (OBSEA) for Remote and Long-Term Coastal Ecosystem Monitoring

Aguzzi

Mànuel

Condal

et al. 2011

Sensors

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A suitable sampling technology to identify species and to estimate population dynamics based on individual counts at different temporal levels in relation to habitat variations is increasingly important for fishery management and biodiversity studies. In the past two decades, as interest in exploring the oceans for valuable resources and in protecting these resources from overexploitation have grown, the number of cabled (permanent) submarine multiparametric platforms with video stations has increased. Prior to the development of seafloor observatories, the majority of autonomous stations were battery powered and stored data locally. The recently installed low-cost, multiparametric, expandable, cabled coastal Seafloor Observatory (OBSEA), located 4 km off of Vilanova i la Gertrú, Barcelona, at a depth of 20 m, is directly connected to a ground station by a telecommunication cable; thus, it is not affected by the limitations associated with previous observation technologies. OBSEA is part of the European Multidisciplinary Seafloor Observatory (EMSO) infrastructure, and its activities are included among the Network of Excellence of the European Seas Observatory NETwork (ESONET). OBSEA enables remote, long-term, and continuous surveys of the local ecosystem by acquiring synchronous multiparametric habitat data and bio-data with the following sensors: Conductivity-Temperature-Depth (CTD) sensors for salinity, temperature, and pressure; Acoustic Doppler Current Profilers (ADCP) for current speed and direction, including a turbidity meter and a fluorometer (for the determination of chlorophyll concentration); a hydrophone; a seismometer; and finally, a video camera for automated image analysis in relation to species classification and tracking. Images can be monitored in real time, and all data can be stored for future studies. In this article, the various components of OBSEA are described, including its hardware (the sensors and the network of marine and land nodes), software (data acquisition, transmission, processing, and storage), and multiparametric measurement (habitat and bio-data time series) capabilities. A one-month multiparametric survey of habitat parameters was conducted during 2009 and 2010 to demonstrate these functions. An automated video image analysis protocol was also developed for fish counting in the water column, a method that can be used with cabled coastal observatories working with still images. Finally, bio-data time series were coupled with data from other oceanographic sensors to demonstrate the utility of OBSEA in studies of ecosystem dynamics.

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“…To perform this test part of the OBSEA infrastructure [3] located 4 km in front of Vilanova i la Geltrú coast (Barcelona) in the Mediterranean Sea has been used. OBSEA is a cabled underwater observatory with up to 3.6 kW and the high bandwidth communication link of 1 Gbps.…”

Section: Field Testsmentioning

confidence: 99%

Buoyancy model for Guanay II AUV

Masmitja

González

Gomáriz

2014

Oceans 2014 - Taipei

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Abstract-The AUV Guanay II is a vehicle developed by SARTI research group of Universitat Politècnica de Catalunya with the objective of providing a platform for measuring oceanographic variables, such as the temperature and salinity of the water column. In the vertical dive is important not to disturb the environment to avoid influencing in the measurements. For this reason a variable buoyancy (VB) system to do the vertical immersions has been designed. This paper presents the model designed to change the buoyancy of the vehicle and the tests both laboratory and field.

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OBSEA an oceanographic seafloor observatory

Cited by 7 publications

References 2 publications

Design and Testing of a Kinetic Energy Harvester Embedded Into an Oceanic Drifter

Design and Testing of a Kinetic Energy Harvester Embedded Into an Oceanic Drifter

The New Seafloor Observatory (OBSEA) for Remote and Long-Term Coastal Ecosystem Monitoring

Buoyancy model for Guanay II AUV

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