Aucun titre de diapositive

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ASSEM A new concept of observatories for long
term seabed monitoring
JANV 2002 DEC 2004
5ème PCRD contract EVK3-CT2001-00051
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

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Partnership
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The ASSEM solution
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
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Principle sketch
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Example of Monitoring Node
2,2 meters 600 kg
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Functions of a Monitoring Node
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Backbone-bridge solution
Sensors are connected to the internal bus by a
bridge
CANopen internal bus (backbone)
power
Sensor bridge
SENSOR
data
specific
standard
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Backbone-bridge solution
Communication devices are connected to the
internal bus by a bridge
CANopen internal bus (backbone)
power
Communi-cation bridge
COMM. DEVICE
data
specific
standard
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Internal architecture
Local comm. (CLSI)
Acoust. comm.
Wired comm.
MN housekeeping
Pop-up modules driver
1 GB
bridge
bridge
bridge
CAN/CANopen
64 MB
64 MB
64 MB
64 MB
bridge
bridge
bridge
bridge
Sensor n
Sensor A
Sensor B
Sensor C
...
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COSTOF
Local comm. (CLSI)
Acoust. comm.
Wired comm.
COSTOF
Pop-up modules driver
1 GB
bridge
bridge
bridge
CAN/CANopen
64 MB
64 MB
64 MB
64 MB
bridge
bridge
bridge
bridge
Communication Storage Front-end
Sensor n
Sensor A
Sensor B
Sensor C
...
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Underwater connection
Innovations

• Power pack replacement
• Installation / sensors replacement
• (Link between nodes)

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Innovations
Underwater connection
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Underwater connection
Innovations
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Innovations
Dispositions anti-chalutage
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Innovations
Dispositions anti-chalutage
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Innovation / communication
A. communication from a Sub (local)
CLSI ContactLess Serial Interface

• Tests before launching
• Tests after in-situ maintenance operations

SSI
COSTOF
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Innovation / communication
A. communication from a Sub (local)
CLSI picture
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Innovation / communication
UN Underwater Network

• Real time commands
• Data transfer

UN
UN
UN
SSI
COSTOF
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Innovation / communication
C. communication from Shore
Permanent Data Server
SERVER
Telecom segment

• Periodic data transfers
• Real time commands
• Alarms

GATEWAY STATION
U.N.
U.N.
SSI
U.N.
COSTOF
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Innovation / communication
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.
B
C
?
?
A
?
?
D
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Finneidfjord experiment
This fjord was recently the location of an
important landslide. The experiment will be
oriented toward slope stability studies with the
use of pore pressure sensors deployed in
boreholes.
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Sensors suite
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Sensors suite
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Corinth experiment
HCMR
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Sensors suite
GEODESIC SENSORS
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Sensors suite
METHANE SENSOR
Improvement sensitivity 50nmole/l to 20
nmoles/l operating depth from 2000m to
4000m better response time antifouling membrane
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Corinth experiment
Station Aegion
buoy
A
M1
OR
M2
Sea level
GSM Link
Acoustic Links
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Example ROSE project for ship wreck monitoring
Evolutions
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Conclusions
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