oceantools tds tsunami detection system

OceanTools TDS Tsunami Detection System

OceanTools Ltd

OceanTools House Claymore Drive Aberdeen AB23 8GD

t: +44 1224 709 606 e: [email protected]

www.oceantools.co.uk

The OceanTools Tsunami Detection System (TDS) is proposed for deployment subsea. The modular system will embrace our experience in subsea pressure housing design, systems integration and proven COTS environmental monitoring sensor technology.

Overview

The TDS will offer options including:

• Depth rating to customer’s requirements including full-ocean depth

• A choice of materials including super duplex and titanium

• Customisable to customer’s precise specifications

• Interfaces to various manufacturers fibre optic telecom cables

• Optional 100% sensor redundancy

• Internal or external pressure and temperature sensors

• Precision seismometers

• Deepwater hydrophones

• Provision for environmental monitoring sensors such as dissolved oxygen or salinity


OceanTools Ltd




Subsea Housing

The subsea housing will be manufactured

from either super duplex or titanium. The

main housing comprises polyurethane bend

restrictors, cable termination, endcaps, body

tube, internal brackets and the relevant

internal components.

If external components are used then they

may be connected to the subsea housing by

way of an Adaptor Plate that provides an

underwater connector for power and data.

Pressure Sensors

The system will utilise Paroscientific pressure sensors. Units may be

fitted internally or externally. If internally we shall provide a capillary

‘ring main’ with ports to the ambient seawater, as we cannot be sure

of the orientation of the housing on the seafloor and a single pressure

port might find itself buried in mud. The ports to the pressure sensor

will be oil filled to reduce any chance of corrosion to the sensor.

The external sensor can be connected to the subsea housing via the

Adaptor Plate. Multiple Adapter plates (pictured right) can be fitted in

order to support additional external sensors.

Temperature Sensors

The system will use temperature sensors supplied by RBR. If an external sensor(s) is used it can be

connected to the subsea housing via the Adaptor Plate.

Seismometer

The interferometric seismometers will be supplied by Silicon Audio. These advanced devices allow the TDS

to be mounted at any attitude on the seafloor.

Hydrophone

The system may incorporate a sensitive deepwater hydrophone to pick up acoustic gravity waves (AGWs)

that radiate from a tsunami trigger event.


OceanTools Ltd




Controller Electronics

The Controller Electronics (CE) board interfaces to the various connected sensors and reads data from them.

The multiple channel data multiplexer will timestamp all data, synchronised to an optional on-shore PTP

time server, and present the data to an Ethernet port.

The CE offer the following functions:

• 6 x serial data (RS232/485) inputs from sensors

• 2 x analogue inputs e.g. hydrophones

• 1 x Ethernet output for multiplexed data

• High accuracy real-time clock

• Voltage input

Power Management

A power supply unit (PSU) with a wide-ranging DC input up to 1500VDC will be used to generate local DC

voltages to power the controller electronics and numerous connected sensors.

Deployment Frame

The system is offered with an optional deployment frame into which the main subsea housing is securely

mounted. The frame includes Delrin panels that may be used to mount connected external sensors such as

pressure, temperature transducers and hydrophones.

The frame may contain buoyancy with an uplift on each corner to help to stabilise the package during

deployment and assist with preventing the package from sinking into soft sea floors.

Fibre Optic Interface

A fibre-optic interface has been chosen that has a nominal

transmission range in excess of 120km.

Connecting to Existing Infrastructure

The TDS may be connected to existing telecommunications

networks or may form part of a new detection network.

If connecting to an existing network a Branching Unit (pictured

right) may be used.

All specifications are subject to change without notice. E&OE. Product datasheets, GA drawings, case studies and other supporting documents are available to download from data.oceantools.co.uk Version 3 (08.03.2021)

http://data.oceantools.co.uk/

0.8

N/A

DCR DATEREV APPROVED

REVISION HISTORY

For ManufactureA

DESCRIPTION

45

0

Frame Split Line For Assembly

While Cable Is Terminated

1990

12

50

A

Bouyancy Aids

To Keep level

On Sea Bed and

Reduce Sinkage

On Soft Seabeds

DETAIL A

SCALE 1 : 6

Ultrawide Input DC-DC

Power Converter

Internal Electronics

Mounting Tray

Precision

Temperature Sensors

Precision Pressure

Sensors

Adaptor plates can be added

for more external connections

Precision Optical

Seismometers

Fibre TR/RX

Boosters

S.Rowley

Client Reference Number

SIZEDIMENSIONS TO THREE DECIMAL POINTS XXX = ± 0.05

ANGEL DIMENSIONS ± 0.5°

Sensor Frame

Project No.

DIMENSIONS TO TWO DECIMAL POINTS XX = ± 0.125

DIMENSIONS TO ONE DECIMAL POINT X = ± 0.25

Part Number

Part Description

Project Description

04/02/2021

OceanTools House,

Claymore Drive,

Aberdeen,

AB23 8GD

United Kingdom

©

A

PROPRIETARY AND CONFIDENTIAL

THE INFORMATION CONTAINED IN THIS

DRAWING IS THE SOLE PROPERTY OF

OceanTools Ltd.

ANY REPRODUCTION IN PART OR AS A

WHOLE WITHOUT THE WRITTEN PERMISSION

OF OceanTools Ltd IS PROHIBITED.

COMMENTS:

WEIGHT:SHEET 1 OF 1

APPROVED

DRAWN

DATENAME

DIMENSIONS IN MILLIMETRES UNLESS OTHERWISE STATED

SURFACE FINISH

TOLERANCE UNLESS OTHERWISE STATED

PROJECTION BS 8888 FINISHMATERIAL REV.A3DWG. NO.

oceantools tds tsunami detection system

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