14 hydrographic survEy
➠
surface the vehicle for communication or creating an advanced layout
recovery. To power the vehicle Saab uses of the operation area. By
different kinds of battery technologies – supplying the payload
Lithium polymer, Lithium Ion and standard module with a Sub-bottom
Led acid batteries which are integrated into profiler, the structure of the
a energy module. The possibility sediment layers below the
to add more than one seabed can be categorised and
battery module increases documented.
the operational range of The addition of an MBES to the
the AUV 62. same module enables studying the
AUV 62 is assembled change of the seabed structure over
with interchangeable, time, relative to the firm basement.
mission specific, payload A payload for environmental
modules. The modules contain monitoring is equipped with a number
all mission specific of different sensors for
equipment such as sensors Fig. 3. AUV62 Mission plan and vehicle control set. physical, chemical and
used to detect, track and biological monitoring of the
survey pipelines and other submerged installations. underwater environment.
Typical sensor systems to fit into an AUV 62 payload The AUV 62 is equipped with a state of the art on-
module are: board computer which facilitates advanced sensor signal
l
processing, resulting in high resolution images of the
Side looking sonar system for detection of objects on
seabed and detected objects.
the seabed and in the water volume
l
Sensor information is recorded for later evaluation
Synthetic aperture sonar (SAS) – For even higher
and can, in parallel, be transmitted by radio, WLAN or
image resolutions and area coverage capability.
l
satellite communication. To extend the operational range
Sub-bottom profiler for objects or infrastructure buried
a gateway buoy can be placed to relay information to
in the sediments.
l
and from the vehicle. To be able to process data inside
MBES (Multi-Beam Echo Sounder) for seabed map
the vehicle is unique and proves the AUV 62 advantages
generation.
l
against other AUVs on the market. To be able to deliver
Magnetic Field Sensors for ferromagnetic objects on
processed data with high resolution in a more rapid way
the seabed, in the water volume and buried in the
will be a cost saving issue.
sediments.
The design of the AUV 62 makes it highly mobile and
A combination of more than one type of sensor can easy to launch and recovered by the use of dedicated
increase the AUV 62’s capabilities – for example, using equipment. The AUV 62 has been launched and recovered
a payload module equipped with a MBES, the seabed from various platforms even shores and harbours using a
profile can be scanned and recorded by the AUV 62, standard boat ramp.
T
o minimise the pre-set time before launching
the AUV 62 has a complete tools box
for mission planning, preparation and
command/control. This software runs in a
PC environment and uses the standard ‘click and drag’
functions. The operator can either have this function in a
stand alone Laptop set or integrated into a more advance
operators environment. The advantages with AUV 62 with
its modular design are:
l Reduced mission time – use the same vehicle for a
variety of missions.
l More rapid sensor data evaluation capabilities –
onboard processing.
l Operational flexibility – Customer can design own
payload module.
l Reduced risks and improved safety. l
Fig. 4. AUV62 Key Data: Length – 4.5–10m (depending on payload and
energy configurations); Diameter – 21-in. (53cm); Weight: 600–1.100 Enter 14 or ✔ at www.engineerlive.com/ihss
kg (depending on payload and energy configuration); Max speed –
0–20 km; Endurance: Distance – 200km; Time: 24hr (depending on Carl-Marcus Remén is with Saab Underwater Systems AB,
battery configurations). Motala, Sweden. www.saabgroup.com
www.engineerlive.com
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