Design of a prototype Tsunami Warning and Early Response system for Cyprus - TWERC

“…1) The spur cable requires two conductors, introducing an additional cost for cable customization and maintenance (though there are some systems that use dual conductor cable, e.g., DONET [5] and the Tsunami Warning and Early Response system of Cyprus (TWERC) [24]).…”

Section: Switching Concepts For a Tree Topology Networkmentioning

confidence: 99%

Actively Controllable Switching for Tree Topology Seafloor Observation Networks

Chen

Howe

Yang

2015

IEEE J. Oceanic Eng.

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Cabled ocean observatory systems that provide abundant power and broad bandwidth communication enabling undersea science have been evolving during the last decade. To establish such permanent infrastructure in the ocean, the technology of cable network switching and fault isolation with very high reliability is essential. In this paper, we review existing switching methods as applied to a constant voltage tree topology network. We propose an actively controllable method that can configure each branch of the network only by changing the feeding current; the current level implicitly conveys the switching information. A laboratory prototype demonstrated the features of backbone switching with zero current and low voltage (less than 20 V), and active controllability of the switch.

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“…CSnet's Offshore Communications Backbone (OCB) in Refs (Clark et al, 2009;Georgiou et al, 2010;Clark and Kocak, 2011). is a hybrid buoy/cabled observatory.…”

Section: Introductionmentioning

confidence: 99%

Ocean observation system design of mooring buoy and benthic node with electro-optical-mechanical cable

Zhang

Tian²,

Zhou³

2022

Front. Mar. Sci.

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We designed a hybrid system named Mooring Buoys Observation System with Benthic Electro-optical-mechanical Cable (MBOSBC) for long-term seafloor and sea surface multi-parameter ocean observation. The electro-optical-mechanical (EOM) cable connects a sea surface buoy and a seafloor junction box so as to establish a transmission link of information and power between the sea surface and the seafloor. The EOM cable also plays the role of mooring tether to the MBOSBC and has to withstand the rigorous marine environment—experiencing mooring loads under complex marine environmental conditions for long periods of time. The data transmission of the system includes the EOM, satellite communication, wireless radio, and acoustic communication. The system power is generated by a wind turbine and solar panels and is transmitted to the seafloor junction box. An acoustic communication instrument is used to gather the sample data from other benthic nodes, such as seafloor landers, AUVs, and underwater gliders. MBOSBC is designed to operate from shallow water to deep sea, and to simultaneously monitor sea surface hydrology, meteorology, and water quality, as well as benthic temperature, pressure, salinity, currents, and seafloor video. We provide the MBOSBC architecture design, including the mechanical design, control, power, data transmission, and EOM cable. Finally, we describe the launch and recovery process of MBOSBC, as well as experimental results.

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Design of a prototype Tsunami Warning and Early Response system for Cyprus - TWERC

Cited by 6 publications

References 3 publications

Research progress of mooring buoy system for sea surface and seafloor observation

Research progress of mooring buoy system for sea surface and seafloor observation

Actively Controllable Switching for Tree Topology Seafloor Observation Networks

Ocean observation system design of mooring buoy and benthic node with electro-optical-mechanical cable

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