seabat multibeam systems latest technologies and applications
DESCRIPTION
By Ellen Stuifbergen, Sales Manager Software Systems Teledyne-RESON develops innovative technologies for Offshore, Survey and Dredge markets. This paper explains the latest technologies and applications in which they may be used. In the presentation the following topics will be explained and shown. The latest models of SeaBat systems are capable of generating Frequency Modulated pulses for improved depth performance and resolution. This reduces the impact of ambient noise in the water column and results in a more robust detection of the seafloor. It improves the data significantly minimizing the processing time even further. Teledyne-RESON has developed an algorithm to automatically detect and track pipelines in the multibeam swath. It outputs the standard 5 points pipeline information in real-time consisting of top of pipe, mean seabed and seabed next to the pipe. The output can be sent to data acquisition and processing software for further analysis, including free-span detection. Pipelines with 40 cm diameter are detected and tracked at a waterdepth of 200 meter. A further development is to display the real-time water column data in the multibeam display. Water column data reveals items of interest which may be difficult to detect in digitized depths, such as poles, and small details on wrecks. The real-time water column shows the history of the data in the along-track and across-track directions. Water column data may be output to any hydrographic software such as PDS2000 to be further processed.TRANSCRIPT
PAGE 1
Teledyne RESON Presentation to Hydrographic Society
New Product Developments
PAGE 2
Agenda
• Teledyne Group• Teledyne RESON Existing Product Range Overview• New Products introduced in 2012
– XRANGE – Full Rate Dual Head
• New Products introduced in 2013 – New Multibeam systems– New Innovative Software Features within the SeaBat Graphical User Interface– Pipetracking
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Teledyne Odom Product Range
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Teledyne BlueView Product Range
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Teledyne RESON Product Range
MultibeamSoftware DredgeConstruction
Transducers
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Teledyne RESON Software
SoftwarePDS2000Data Acquisition & Processing Software
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Teledyne RESON Forward Looking
SeaBat 7125/7128
200/400 kHz
Development/prototypeSeaBat 7130
3x200/635 kHz
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Teledyne RESON Multibeam EchosounderDeep Water Systems
12 KHz / 24 kHz
SeaBat 7150 SeaBat 7160 SeaBat 7111
100 kHz44 kHz
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Teledyne RESON Multibeam – shallow water
SeaBat 7101 SeaBat 7125
SeaBat 7125-ROV2
SeaBat 7125-AUV
SeaBat 8125-H240 kHz 455 kHz
SeaBat 7125-SV2
200/400 kHz
New: T20-P system
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New SeaBat MB systems
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New Product 7160Primo 2013 - Release of 7160, Medium Water System (3.000 m.)
SeaBat 7160
Available as a new system or as an upgrade to the previous SeaBat 8160 system
Pole mountedDeep water system
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SeaBat 7150
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SeaBat T20-PPortable Sonar Processor under mobilization
Portable Sonar ProcessorRuggedized, marine suitable24VDC, 110-230 VACSingle point Cabling
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T20 Features
•200-400kHz wideband•120° (140° - 165°- 400 kHz only) Swath Width•1° x 1° / 2° x 2° (400/ 200 kHz) •Max. 512 Beams•Ping rate Up to 50 pings/ second•Transducer cable length: 10, 25 or 50 m•Depth resolution 6 mm
•Transducer compact and low weight:– 6kg in water– Half the size of SeaBat 7125 Receiver
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SeaBat – Portable Sonar Processor
•Robust and built for marine use
•Water resistant (IP54)
•Flexible power interface– 24V DC for ease of use on smaller vessels– 100-230VAC for convenient office use
•Single point of connection for survey sensors
– Motion & heading sensor – Position (GPS)– Time – Sound Velocity (power + comms.)– Standard DB-9 style connectors
“RESON’s Portable Sonar Processor handles time tagging and processingof sonar and sensor data internally, removing the load from user suppliedlaptop – ensuring accurate, tested and reliable processing of sonar data”.
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How to perform a survey?
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New items in the SeaBat systems
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SeaBat Feature Packs included
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Operation modes
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Operating modes
8125-H8125-H
71017101
71252007125200
Min beamsMin beams Wide modeWide mode FlexMode (Optional)FlexMode (Optional)
140°140 beams EA
140°140 beams EA
165°512 beams EA
165°512 beams EA
140°512 beams
140°512 beams
71254007125400
140°240 beams EA
140°240 beams EA
165°512 beams EA
165°512 beams EA
140°512 beams
140°512 beams
150°101 beams EA
150°101 beams EA
210°511 beams EA(requires 210 deg.
Hardware)
210°511 beams EA(requires 210 deg.
Hardware)
150°511 beams
150°511 beams
120°256 beams EA
120°256 beams EA
120°511 beams
120°511 beams
IntermediateIntermediate
140°320 beams ID
140°320 beams ID
140°512 beams ID
140°512 beams ID
150°511 beams ID
150°511 beams ID
120°512 beams ID
120°512 beams ID
Best coverageBest coverage
140°320 beams ED
140°320 beams ED
140°512 beams ED
140°512 beams ED
150°511 beams ED
150°511 beams ED
120°512 beams ED
120°512 beams ED
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Operating mode - Wide mode• Number of beams & beam mode are fixed according to the system in use. • Wide mode uses Equi Angle only• Used for maximum swath• Quay wall or vertical structure survey
7125165°
512 beams EA
7125165°
512 beams EA
71257125 7101210°
511 beams EA
7101210°
511 beams EA
71017101
• Variswath is still available
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Operating modes – NEW in FP4• In Equidistance mode Constant Floor Spacing
– User definable Beam spacing in meters
• In Equiangle mode:– User definable number of beams
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Constant Seafloor Spacing
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X-Range (Fp3)• X-Range is FM modulation• 20-25% longer range• No loss of range resolution• Noise suppression effect (better Quality data)
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X-Range• Extended range (FM)
• Provides increased range (increasing the energy)
• Transmit a very long pulse (typically 100-1000 times longer
• Using long pulses degrade resolution
• Use pulse compression to regain resolution
• Improved Noise immunity (by pulse compression)
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X-Range Translated to Survey• Better noise suppression • Better Singal discrimination• Much higher power = more range
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Full rate Dual head (FRDH)
Old situation
FRDH
• Using X-Range to ping simultaneously• Improvement on Dual Head ping rate • 2 x 512 Beams -> Extreme amount of data• Seamless data set merged together• 2 x swath width (10-12 times water depth)
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Full Rate Dual Head
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Watercolumn data
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Normally we try to avoid the “noise”…
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But sometimes it might be usefull..
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• Methane gas is visible, but we do not digitise it.
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New Water Column Display• Multi-view• History view• Water column visualization
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Tracker – Automation
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Tracker Enhancements• Tracker in FP3
– Automatic optimization of sonar settings – Reduced manual interaction – More user-friendly – Cleaner data sets – Reduced processing time and cost
• Tracker in FP4– Constant swath width– Tilted Heads & Dual Heads – It is now possible to disable certain Tracker control settings for
advanced users who wish to remain in control of certain settings
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Multi-Detect
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Multi-Detect• Multiple detections within each beam, including the full water
column
• Capture enhanced detail from a single survey line over a complex feature
• Ensure that full detail is captured of any object in the water column
• Up to five detections may occur anywhere within each beam
• Note that Multi-Detect is not equivalent to multiple soundings across a beam footprint on the seabed
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Multi-Detect – An Advanced Tool• The surveyor controls the sensitivity of the Multi-Detect
algorithm using three controls:
• Object Size (Sensitivity): increasing this results in more detections on smaller objects. Decreasing it results in fewer detections and only on larger objects.
• Amplitude Sensitivity: increasing this causes more objects to be detected
• Max Detections: this control is used to limit the number of detections output for each beam to five
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Multi-Detect Wreck Data
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Multi-Detect
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Multi-Detect Turbine Data
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Acoustic Environment may be Complex
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A Typical Bottom Detection Algorithm (BDA)• A Typical BDA• May show gaps
• Multipath Detection
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SeaBat First Return Algorithm• Detect more than once
• Output only First Return
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Bottom Detection
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Multi-Detect – First Return Algorithm
A typical bottom detection
New First Return from Multi-Detect
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Pipe Detection & Tracking
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Pipe Detection and Tracking• Optional Feature or SeaBat System FP4• Searches for the pipe with user defined settings• Steers the Flexmode or full swath towards the pipe• Shows vessel relative to pipe in helmsman view
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Pipe Detection and Tracking• Pipe diameter entered into SeaBat User Interface• Pipe position automatically determined by detection algorithm• Pipe displayed on User Interface • User interface shows 5 points detection
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Pipe Detection and Tracking - output• Lateral position of pipe calculated• Pipe adjacent depths calculated• Mean seabed depths calculated
• Exports:– Top of Pipe– Adjacent markers– Mean seabed markers
• Free spans may be calculated
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Pipe detection in the swath• Detection algorithm initially calculates top of pipe positions• BDA searches for detections in vicinity of pipe• Pipe detection algorithm automatically matches pipe position• Pipe position for next ping is initialised from previous pings• Pipe needs to be found several times at (almost) same position
in swath• Several pipe detections creates a pipe section
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5 points output
•Top of pipe – Top of inserted pipe
•Points left/right from pipe– At distance of half diameter from pipe
•Mean Seabed at user defined offset at each side from top of pipe
•Points are defined from the MB data points in the swath (not from DTM)
•The 5 points are exported in 7k record as a 5 points string (ID 2004) •Format available for software packages
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Pipe detection settingsPipe detection settings are divided in:•Pipe detection in swath•Pipe parts creation•Pipe route creation•Steering of swath•5-points settings
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Detection of pipe in Swath settings• Diameter of pipe• Maximum Free Span (m) and
detection threshold– Maximum and minimum
distance from seafloor to detect pipe
• Statistic Threshold – Finds standard deviation of an
area around the pipe.– Higher values allow more
deviation
• Filters can be used to omit data with bad quality tests
Max freespanMin threshold
Detection depth
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Pipe steering Steers the swath towards the
pipe. Steers either full swath or
flex part of the swath.
Steering difference– Swath will only steer after a
change larger than the difference set
Steering delay– Difference has to occur at a
number of sequential swaths
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What if?• Two or more pipes are followed at the same time?
– More than one pipe can be followed at the same time– Helmsman will show all pipes and select best possible position relative
to multibeam.
• Pipe changes diameter?– The algorithm also allows changes from the diameter
• Pipe is buried under seafloor– The MB system is not able to look beneath the seafloor.– When the pipe shows again it will:
• Continue the pipe when the gap is small enough• Create a new pipenumber when gap is too large
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Dual Head Pipe Detection• Sonar offsets and head tilt entered into SeaBat User Interface• Each FlexMode steered to pipe centre• Lateral position from pipe is calculated and:
– Displayed to user– Numerically– Graphically
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Dual Head – Single User Interface
PAGE 64
Pipe Detection module Demo/ Test• Fugro tested Pipe Detection Module in Caspian Sea using Dual
Head System • Demo Configuration:
– Dual Head SeaBat 7125 System– PDS2000 for Data Acquisition
• Pipeline tracked automatically in water depth varying from 10- to more than 200 m
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Demonstration of
Pipe Detection and Tracking
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Forward looking systemsBasking Sharks
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Basking shark (reuzenhaai)• Second largest shark• Eats plankton and opens mouth to eat• Used forward looking system 7128
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7128 forward looking
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Questions?