Title: Aucun titre de diapositive
1ASSEM 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
2Partnership
3The 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
4Principle sketch
5Example of Monitoring Node
2,2 meters 600 kg
6Functions of a Monitoring Node
7Backbone-bridge solution
Sensors are connected to the internal bus by a
bridge
CANopen internal bus (backbone)
power
Sensor bridge
SENSOR
data
specific
standard
8Backbone-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
9Internal 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
...
10COSTOF
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
...
11Underwater connection
Innovations
- Power pack replacement
- Installation / sensors replacement
- (Link between nodes)
12Innovations
Underwater connection
13Underwater connection
Innovations
14Innovations
Dispositions anti-chalutage
15Innovations
Dispositions anti-chalutage
16Innovation / communication
A. communication from a Sub (local)
CLSI ContactLess Serial Interface
- Tests before launching
- Tests after in-situ maintenance operations
SSI
COSTOF
17Innovation / communication
A. communication from a Sub (local)
CLSI picture
18Innovation / communication
UN Underwater Network
- Real time commands
- Data transfer
UN
UN
UN
SSI
COSTOF
19Innovation / 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
20Innovation / 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
21Finneidfjord 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.
22Sensors suite
23Sensors suite
24Corinth experiment
HCMR
25Sensors suite
GEODESIC SENSORS
26Sensors suite
METHANE SENSOR
Improvement sensitivity 50nmole/l to 20
nmoles/l operating depth from 2000m to
4000m better response time antifouling membrane
27Corinth experiment
Station Aegion
buoy
A
M1
OR
M2
Sea level
GSM Link
Acoustic Links
28Example ROSE project for ship wreck monitoring
Evolutions
29Conclusions
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