ASSEM : A new concept of observatories for long term seabed monitoring

A new concept of observatories for long term seabed monitoring

Paris, 23- 24 mars 2004 Atelier Expérimentation Instrumentation 2004 1

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ASSEM : A new concept of observatories for long term

seabed monitoring

R. Person, IFREMER, J. Blandin, IFREMER, J.M. Strout, NGI, J. Ammann, IPGP, V. Ballu, IPGP, P. Briole, IPGP, G. Etiope, INGV, M. Masson, CAPSUM GmbH, V.

Lykousis, HCMR, G. Ferentinos, Univ. Patras, S. Smolders, THALES Geosolutions

JANV 2002 – DEC 20045ème PCRD : contract EVK3-CT2001-00051



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Institut Français de Recherche pour

l ’Exploitation de la Mer

- France -

Co-ordinator

Institut de Physique du Globe de Paris

- France -

Istituto Nazionale di Geofisica e

Vulcanologia

- Italy -

Hellenic Centre for Marine Research

- Greece -

University of Patras

- Greece -

Norwegian Geotechnical

Institute

- Norway -

CAPSUM Technologie GmbH

- Germany -

Thales Geosolutions

- Belgium -

Partnership



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Deploy a selection of sensors on a seabed area (some km2) connected to standard nodes.

Nodes are communicating between them by acoustic links or cable links.

Sensors can be deployed by ROV or submersible.

Nodes can be linked to a permanent data server on shore to achieve real-time connexion and data archiving.

The sensors locations are determined from a detailed pre site survey

The ASSEM solution



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Principle sketch



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2,2 meters600 kg

Example of Monitoring Node



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Functions of a Monitoring Node

Provide a set of sensors with :

Sensor A

Sensor B

Sensor C

Sensor n...

• Energy

Local comm

. (CLSI)

Acoust. comm.

Wired comm.

• Communication channels with the external world

Data storage

Measurements Sequencer

• Local data logging resources



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bridgeSENSOR

CANopen internal bus (backbone)

power

data

standard

specific

Sensors are connected to the internal bus by a “bridge”

Backbone-bridge solution



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bridge

COMM. DEVICE

CANopen internal bus (backbone)

power

data

standard specific

Communication devices are connected to the internal bus by a

“bridge”

Backbone-bridge solution



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Internal architecture

Sensor A

Sensor B

Sensor C

Sensor n...

Local comm. (CLSI)

Acoust. comm.

Wired comm.

bridge bridge bridge

bridgebridgebridgebridgeCAN/CANopen

64 MB 64 MB 64 MB 64 MB

1 GBPop-up modules

driver

MN housekeeping



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COSTOF

Sensor A

Sensor B

Sensor C

Sensor n...

Local comm. (CLSI)

Acoust. comm.

Wired comm.

bridge bridge bridge

bridgebridgebridgebridgeCAN/CANopen

64 MB 64 MB 64 MB 64 MB

1 GBPop-up modules

driver

COSTOFCommunication & Storage Front-end



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Underwater connection

• Power pack replacement • Installation / sensors

replacement• (Link between nodes)

Innovations



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Innovations




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Innovations



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Innovations

Dispositions anti-chalutage



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Innovations

Dispositions anti-chalutage



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Innovation / communication

CLSI: ContactLess Serial Interface

SSI

A. communication from a Sub (local)

COSTOF

• Tests before launching

• Tests after in-situ maintenance operations



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CLSI picture


A. communication from a Sub (local)



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UN UN

UN

USER

B. communication from a Ship UN: Underwater Network

COSTOFSSI


• Real time commands

• Data transfer



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C. communication from Shore

SERVER

USER

Internet

GATEWAY STATION

U.N.

U.N.U.N.

Teleco

m se

gmen

t

Permanent Data Server

COSTOFSSI


• Periodic data transfers

• Real time commands

• Alarms



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Adaptive acoustic network

The first experiments with ASSEM nodes rely upon the use of and Local Adaptive Acoustic Network: data are transmitted from one point of the network to another one by using the best road.

AB C

D




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This fjord was recently the location of an important landslide. The experimentwill be oriented toward slope stability studies with the use of pore pressure

sensors deployed in boreholes.

Finneidfjord experiment



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Sensors suite



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Sensors suite



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Corinth experiment

HCMR



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GEODESIC SENSORS

Sensors suite



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METHANE SENSOR

Improvement:sensitivity 50nmole/l to 20 nmoles/loperating depth from 2000m to 4000mbetter response timeantifouling membrane

Sensors suite



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Station AegionA M1 ORM2

Sea level

Acoustic Links

buoy

GSM Link

Corinth experiment



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Example ROSE project for ship wreck monitoring

Evolutions



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ASSEM is a new concept of real time sea floor observatory

ASSEM is a warning system

ASSEM can be linked to another observatory system like GEOSTAR

ASSEM concept could be applied in biological or environmental studies

Conclusions

Documents

ASSEM : A new concept of observatories for long term seabed monitoring