Products Datasheets

LEGAL    PRIVACY

(C) 2015 Envirtech Subsea Systems S.r.l. -  info@envirtech.org

 DATA BUOYS


MK-I MAWS, Directional Wave Buoy

The DeepSea MKI buoy is state of the art in directional wave measurement and oceanographic data gathering. The buoy includes a solid-state MEMS directional wave measurement pack, an automatic weather station and a sea surface temperature transducer. The payload can be expanded with further underwater instrumentation to measure biochemical and physical parameters, and a multi-satellite, multi-channel receiver for iSSH measurement (tide). The buoy is composed of a central metal pole in AISI 316 stainless steel, and three rotationally moulded, foam-filled floats that are assembled to form the shape of a truncated cone. The buoy dimensions, the focal light height, and the radar corner reflector allow good visibility in any conditions, day or night.


MK-IV 3Metres Oceanographic Data Buoy

The Envirtech MKIV, 3-Metres buoy, is state of the art in met-ocean data gathering. The buoy is composed of a multi-sector rotationally moulded, foam-filled floats, and stainless steel mechanical frame and turret. It can host many payloads. In standard configuration it includes a solid-state MEMS directional wave measurement pack, an automatic weather station (AWS)and a sea surface temperature transducer. Payloads can be expanded with further instrumentation to measure bio-chemical and physical parameters, like multi-parameter probes, ADCPs (both reversed assembling or on-seabed deployed), multi-satellite, multi-channel receiver for iSSH measurement (tide). The buoy dimensions, the focal light height and the radar corner reflector allow good visibility in any conditions, day or night. The buoy is the ideal solution for permanent floating laboratories.

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MK-III Tsunami Buoy

Envirtech MKIII Data Buoys are tall, thin buoys that float upright in the water and are characterized by a small water plane area and a large mass. Because they tend to be stable ocean platforms, spar buoys are popular for making oceanographic measurements. In Envirtech ocean data acquisition systems, spar buoys are used to collect data from the sea bottom and to relay this data using satellites, such as Inmarsat or Iridium, to a control center on shore. The buoy assures a very stable platform for bidirectional communications to/ from the ocean bottom, and allows total remote control of deployed devices. Together with an Envirtech Tsunameter the MKIII is a reliable part of any marine tsunami warning system. The buoy survives to Cyclons  (Beaufort 14-17 extend scale checked with Typhoon  Megi in 2010)

 

MKI-4  Easy to deploy (ETD) Tsunami Buoy

Envirtech MKI-4 buoy assures a stable platform for bidirectional communications to/ from the ocean bottom, and allows total remote control of deployed devices. Together underwater modules, like Calypso or Poseidon Class devices, the MKI-4 is a reliable part of the marine segment of a tsunami warning system. It has been designed taking in mind the big experience matured by Envirtech in Bengal Bay, the Andaman Sea and the South China Sea, to mitigate vandalism risk and to implement easy to deploy (ETD) procedures as requested by end-users. It can be deployed easily using  relative small fishing boats or  oceanographic and supply vessels and can be serviced on  board avoiding the return in port for maintenance operations. The MKI-4 can be ordered in two  configurations with solar panels or powered by lithium batteries. A special hook consents a safe management of all deployment operations.

 

 

MKVI  Surveillance buoy and multistatic sonar node

The Envirtech MKVI buoy consents to extend awareness about the marine environment beyond the horizon. As first goal the buoy detects, identifies and tracks cooperative maritime targets, equipped with active AIS and radar transmitter, relaying collected data to an onshore control center via LEO Satellite communication systems. Some additional payloads can also detect and track non-cooperative targets using passive and active sonar (Multistatic sonar)  and radio interferometer. The buoy has been designed to operate as fixed (moored) node in large networks, to be deployed for long time operation  in deep sea and to reduce maintenance interventions. Further modular and exchangeable payloads allow the buoy to collect meteorological, oceanographic and water quality data, including pollution agents. Flexible solar panels and an emergency lithium power pack assure needed power in any  condition. Reduced dimensions and technical solutions adopted in hull design consent to  reach high survival ratio to sea storms (cyclones) and collisions.

 

PAYLOADS


Directional Wave Sensor and Processing Payload

The system core consists of a state of the art IMU (Inertial Measurement Unit) . It is a solid state, MEMS, electronic device that measures the buoy hull dynamic parameters using a combination of 3D accelerometers, gyroscopes, and magnetometers. A Digital Signal Processor (DSP) provides real-time 3D orientation, acceleration, rate of turn and earth-magnetic field data. Once calculated the attitude and heading data, a microprocessor unit processes them to obtain a geographically oriented displacement file (HNE file). In the HNE file each sample consists of Heave, Displacement North/South and Displacement East/West measured in millimetres. Once transmitted to a shore station, data can be further processed by a zero-crossing analysis and a Fast Fourier Transform to obtain the directional sea wave statistics as well as the directional energy spectra. The local Non-Volatile Ram can store all collected data for some years, depending on the data acquisition rate.


Calypso Class Tsunameter

CALYPSO CLASS devices are the result of many years of experience in the manufacture of Tsunami gauges. CALYPSO devices are deep ocean real-time tsunami monitoring systems based on sea level measurements. The systems are deployed in free-fall assured to their compact buoyancy line, after a brief survey of the sea bottom to find a flat area. Each CALYPSO unit integrates all the basic functions in one titanium case, which results in a more cost-effective system to meet the increasing market demand for highly accurate, reliable, and low cost bottom pressure recorders, operating in semi-real time. CALYPSO devices have an operating depth of 6,000 meters and can run on independent power for 2.5 years.

 


Ocean Bottom Seismometer

TRITON CLASS Ocean Bottom Seismometers are low cost devices for seismic refraction, composed of a 17 glass sphere certified up to 6700mwd containing three geophones (two horizontal and one vertical), a rubidium miniaturized atomic clock, a high resolution digitizer to collect data and the battery pack to supply all the electronic devices.

 Software and Control Center equipments


Data Concentrator and Transceiver Unit

The TCP-IP Data Concentrator and Transceiver Unit (Envirtech TCPIP/DCTU) is a multipurpose intelligent device designed for remote operation of Envirtech data buoys, tide gauges, meteorological stations (AWS Automatic Weather Stations) and other SCADA devices to implement a complete solution to receive and transmit data via VHF, UHF, W-LAN, GPRS/EDGE and Satellite networks. Each unit is composed of the pre-selected Radio-Modem implementing the radio communication segment, controlled by a microcomputer programmed to decode in-field collected data and to send commands toward the field.


Data Presentation, Alarm and Command Software

EnvHydro is a general purpose software designed for SCADA applications involving remote data gathering, alarms and commands. It has been developed and used in many Envirtech solutions and is built using a Client/Server architecture working on a scalable RDBMS (like Microsoft SQL Server or Oracle) and an embedded GIS engine. EnvHydro is composed of many modules to assure error-proof procedures.

Tide Stations and Coastal/Shore side equipments


Tide station and coastal Tsunami detection and warning

The Envirtech eTide-I station performs, records and transmits accurate water level measurements on a regular and uninterrupted basis over long periods of time while maintaining a stable elevation reference. The technology, one of the most reliable and modern available on the market, in conjunction with bidirectional satellite or radio transmissions, consents to implement Tsunami monitoring stations to be deployed along coasts in addition to deep sea tsunami buoys.

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