Technical Specifications of Surface Buoy potx

2 SB ARCHITECTURE The Surface Buoy SB system proposed is a SPAR buoy.. The main advantages of this configuration for the specific applications are the following: - the lower pole provide

Envirtech S.p.A Cap Sociale Euro 500.000 i.v

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This document or parts of it cannot be used for scopes not authorized by Envirtech SpA that will protect its

rights

Envirtech SpA

Venice, 15th February 2011

Envirtech Code: 20003-SPE-200.0

TSUNAMI WARNING SYSTEM Technical Specifications of

Surface Buoy

TABLE OF CONTENTS

1 SYSTEM OVERVIEW 3

2 SB ARCHITECTURE 4

3 SB FUNCTIONALITIES 10

4 TECHNICAL DESCRIPTION 11

4.1.1 Ballast and Mooring line specifications 11

4.1.2 Buoy Frame specifications 11

4.1.3 Day and Night Signalling devices 11

4.1.4 Autonomous Power supply system 11

4.1.5 Electronic Housing 12

4.2 SATELLITE MODEM 13

4.3 SURFACE ACOUSTIC MODEM 13

5 SB COMPLIANT TABLE 14

1 SYSTEM OVERVIEW

The Tsunami Warning System (TWS) designed by Envirtech is composed of the following main subsystems:

• an Underwater Module (UM) to be installed at the sea bottom in open sea location for the

accurate measurement of the tide and the identification of anomalous conditions

of UM to be transferred via satellite link to a Data Centre (DC) for visualization and

analysis

reception via satellite link of the data of SB and UM to be displayed, stored and analysed

ACOUSTIC LINK

SATELLITE LINK

UM

SB

DC

Fig 1.1 – Envirtech TWS Overview

The present document deals with the architectural, functional and performance specifications of the Surface Buoy (SB)

2 SB ARCHITECTURE

The Surface Buoy (SB) system proposed is a SPAR buoy Spar buoy is characterized by a tall and thin configuration It floats upright in the water and it is characterized by a small water plane and a large mass This configuration tends to be a stable ocean platform Adjustment of the water plane area and the mass allows spar buoys to be tuned so they tend to not respond to wave forcing The Envirtech SB is composed of 3 main parts:

- a buoyant (cone + cylinder) in the middle;

- a turret on the top

The main advantages of this configuration for the specific applications are the following:

- the lower pole provide a reliable mechanical support of the acoustic modem and related cable: the acoustic transducer can be mounted at least at 5-6m water depth to get a

reliable acoustic link

- The buoyant can host on the top in the central part the battery and electronic unit with related connectors

- The turret on the top allows to mount the solar panels, the satellite modems and additional devices like WiFi interface, meteorological station, etc

- The hydrodynamic of the buoy proposed in characterised by small tilt movements: this allows to get a vertical stable platform to optimise the performances of the acoustic link between the buoy and the underwater module to get the data related to the tide and

tsunami detection

A block diagram of the buoy proposed is reported in picture 2.1

cd SB Architecture

BUOY FRAME WITH SIGNALING DEVICES

BALLAST

MOORING LINE

ELECTRONIC UNIT

AUTONOM OUS POWER SUPPLY SUBSYSTEM

SATELLITE MODEM

WLAN MODEM

GPS RECEIVER

ACOUSTIC MODEM

METEOROLOGICAL STATIONS

HEADING &

TILT SENSOR

Fg 2.1 – SB Block Diagram

It is composed of the parts reported in the following table

mechanical accessories and 4 tons metal block

to anchor the buoy

This parts requires a specific design taking into account the depth and the

installation site

Envirtech can provide the mooring line with related design and dynamical analysis results

Buoy Frame with signaling devices A spar buoy equipped with the signaling

devices stated by IALA, IMO and IMA standards and regulations

It integrates mechanically all the parts listed below in the present table

panels, a battery charger with related control electronic and a lead gel battery pack

proof case

movement, integrated in the Electronic Unit

This part is optional and not included in the standard version

sea integrated in the Satellite Modem

under the buoy

the Data Centre on land

the installation and maintenance ship

humidity, pressure, wind speed and direction) with related acquisition electronic

This part is optional and non included in the standard version

Drawings of the SB are reported hereinafter It can be noted that the SB metal frame is equipped

with double supports for Satellite and Acoustic modems because on user request it is possible

to provide a redundant configuration Anyway the standard version is without redundancy

Fig 2.2– Surface Buoy (Main Sizes and Weights)

Fig 2.3– Surface Buoy (Detailed Parts)

Figure 2.4 –Surface Buoy

3 SB FUNCTIONALITIES

The main functionalities provided by the SB are summarized hereinafter:

• Self monitoring of SB status data composed of

o Electronic unit diagnostic status (battery voltage and current, internal temperature, pressure and water intrusion)

o Buoy position from GPS receivers and notification of SB OUT or INSIDE a circular zone centred on the mooring point of the SB

hours, 3 hours, 4 hours, 6 hours depending on the user settings

• Hourly logging of all SB status data in the internal mass memory

• Generation and transmission on request to the DC of the current SB status data

• Reception, execution and reply to settings commands or data request:

o change of the period of autonomous delivery to DC of the SB status data;

o ON/OFF of WiFi

o Test of SAT link

o Current SB status request

Underwater Module (UM) and forward of these messages to the satellite (SAT) modem

messages to the ATS to be sent to UM

• Provide a low level commands menu via test cable or WiFi interface to test each device and component

4 TECHNICAL DESCRIPTION

The specifications of the main components of the SB are reported in the following paragraphs

4.1 Ballast and Mooring line specifications

The design depends to the installation site parameters and its water depth It will be defined in the detail design phase

4.2 Buoy Frame specifications

The mechanical drawing of the buoy is reported in pictures 2.2 and 2.3 It is a spar type buoy able

to remain stable in vertical position and to support Beaufort 11 The buoy body is composed of a central steel pole and a foam body having a diameter of 1.45 m

The buoy weight is 2000 kg with a buoyancy of 2750kg

All metal parts are zinc protected and epoxy painted (Metco-System)

4.3 Day and Night Signalling devices

1 day mark radar reflector;

1 marine light with independent battery and solar panel for a visibility up to 4 nautical miles;

Focal plane 3500mm

4.4 Autonomous Power supply system

It is composed of 4 Solar Panel (Polycrystalline) 50W @12VDC each, and 4 Lead Gel

accumulators 110Ah @12VDC each Each Solar panel has a dedicated charge controller to

optimise the efficiency of the whole system The accumulators pack can supply the whole system for more than 70 days in case of no sunny conditions

4.5 Electronic Housing

It is depicted in Fig 4.1

Fig 4.1 - Electronic Housing

Technical specifications:

• Box in Al and PTFE with 8 underwater connectors for

o Satellite Modems

o Acoustic Modems

o WiFi Box

o Power supply

o CPU board

o Status board

o Switch board

o DC/DC board

4.6 Satellite Modem

It is depicted in Fig 4.2

Fig 4.2 - Satellite Modem

Technical specifications:

Tx: 1626.5 – 1660.5 MHz.*

GPS: 1575.42 MHz

4.7 Surface Acoustic Modem

It is shown in picture 4.3 below

Fig 4.3 – Surface Acoustic Modem

Its main features are the following:

- Omnidirectional

5 SB COMPLIANT TABLE

with the sea waves

Beaufort 11 of wind and sea wave conditions

dynamical analysis verification shall be provided for each

installation site

of the electronic system and the communication system

(satellite and acoustic link)

compliant with a focal plan at least at 3m over the sea level

communication system useful for real time communication

with a Laptop from the installation and maintenance ship