Seabat Multibeam systems latest technologies and applications

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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.

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Seabat Multibeam systems latest technologies and applications

  1. 1. Teledyne RESON Presentation to Hydrographic Society New Product Developments PAGE 1
  2. 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 PAGE 2
  3. 3. PAGE 3
  4. 4. Teledyne Odom Product Range PAGE 4
  5. 5. Teledyne BlueView Product Range PAGE 5
  6. 6. Teledyne RESON Product Range Software Dredge Construction Transducers Multibeam PAGE 6
  7. 7. Teledyne RESON Software PDS2000 Data Acquisition & Processing Software Software PAGE 7
  8. 8. Teledyne RESON Forward Looking SeaBat 7125/7128 200/400 kHz Development/prototype SeaBat 7130 3x200/635 kHz PAGE 8
  9. 9. Teledyne RESON Multibeam Echosounder Deep Water Systems SeaBat 7150 SeaBat 7160 SeaBat 7111 12 KHz / 24 kHz 44 kHz 100 kHz PAGE 9
  10. 10. Teledyne RESON Multibeam – SeaBat 7101 240 kHz SeaBat 8125-H 455 kHz shallow water SeaBat 7125 200/400 kHz SeaBat 7125-SV2 SeaBat 7125-ROV2 SeaBat 7125-AUV New: T20-P system PAGE 10
  11. 11. New SeaBat MB systems PAGE 11
  12. 12. New Product 7160 Primo 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 mounted Deep water system PAGE 12
  13. 13. PAGE 13
  14. 14. PAGE 14
  15. 15. SeaBat 7150 PAGE 15
  16. 16. Portable Sonar Processor Ruggedized, marine suitable 24VDC, 110-230 VAC Single point Cabling SeaBat T20-P Portable Sonar Processor under mobilization PAGE 16
  17. 17. 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 PAGE 17
  18. 18. SeaBat – Portable Sonar Processor •Robust and built for marine use •Water resistant (IP54) •Flexible power interface “RESON’s Portable Sonar Processor handles time tagging and processing of sonar and sensor data internally, removing the load from user supplied laptop – ensuring accurate, tested and reliable processing of sonar data”. – 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 PAGE 18
  19. 19. How to perform a survey? PAGE 19
  20. 20. New items in the SeaBat systems PAGE 20
  21. 21. SeaBat Feature Packs included PAGE 21
  22. 22. Operation modes PAGE 22
  23. 23. Operating modes Min beams Min beams Intermediate Intermediate Best coverage Best coverage Wide mode Wide mode FlexMode FlexMode (Optional) (Optional) 7125 7125 200 200 140° 140° 140 beams EA 140 beams EA 140° 140° 320 beams ID 320 beams ID 140° 140° 320 beams ED 320 beams ED 165° 165° 512 beams EA 512 beams EA 140° 140° 512 beams 512 beams 7125 7125 400 400 140° 140° 240 beams EA 240 beams EA 140° 140° 512 beams ID 512 beams ID 140° 140° 512 beams ED 512 beams ED 165° 165° 512 beams EA 512 beams EA 140° 140° 512 beams 512 beams 7101 7101 150° 150° 101 beams EA 101 beams EA 150° 150° 511 beams ID 511 beams ID 150° 150° 511 beams ED 511 beams ED 8125-H 8125-H 120° 120° 256 beams EA 256 beams EA 120° 120° 512 beams ID 512 beams ID 120° 120° 512 beams ED 512 beams ED 210° 210° 511 beams EA 511 beams EA (requires 210 deg. (requires 210 deg. Hardware) Hardware) 150° 150° 511 beams 511 beams 120° 120° 511 beams 511 beams PAGE 23
  24. 24. Operating mode - Wide mode • • • • • Number of beams & beam mode are fixed according to the system in use. Wide mode uses Equi Angle only 7101 7125 7101 7125 Used for maximum swath 210° 165° 210° 165° Quay wall or vertical structure survey 511 beams EA 512 beams EA 511 beams EA 512 beams EA Variswath is still available PAGE 24
  25. 25. 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 PAGE 25
  26. 26. Constant Seafloor Spacing PAGE 26
  27. 27. X-Range (Fp3) • • • • X-Range is FM modulation 20-25% longer range No loss of range resolution Noise suppression effect (better Quality data) PAGE 27
  28. 28. 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) PAGE 28
  29. 29. X-Range Translated to Survey • Better noise suppression • Better Singal discrimination • Much higher power = more range PAGE 29
  30. 30. 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) PAGE 30
  31. 31. Full Rate Dual Head PAGE 31
  32. 32. Watercolumn data PAGE 32
  33. 33. Normally we try to avoid the “noise”… PAGE 33
  34. 34. But sometimes it might be usefull.. PAGE 34
  35. 35. • Methane gas is visible, but we do not digitise it. PAGE 35
  36. 36. New Water Column Display • Multi-view • History view • Water column visualization PAGE 36
  37. 37. Tracker – Automation PAGE 37
  38. 38. 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 PAGE 38
  39. 39. Multi-Detect PAGE 39
  40. 40. 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 PAGE 40
  41. 41. 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 PAGE 41
  42. 42. Multi-Detect Wreck Data PAGE 42
  43. 43. Multi-Detect PAGE 43
  44. 44. Multi-Detect Turbine Data PAGE 44
  45. 45. Acoustic Environment may be Complex PAGE 45
  46. 46. A Typical Bottom Detection Algorithm (BDA) • A Typical BDA • May show gaps • Multipath Detection PAGE 46
  47. 47. SeaBat First Return Algorithm • Detect more than once • Output only First Return PAGE 47
  48. 48. Bottom Detection PAGE 48
  49. 49. Multi-Detect – First Return Algorithm A typical bottom detection New First Return from Multi-Detect PAGE 49
  50. 50. Pipe Detection & Tracking PAGE 50
  51. 51. 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 PAGE 51
  52. 52. 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 PAGE 52
  53. 53. 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 PAGE 53
  54. 54. 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 PAGE 54
  55. 55. 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 PAGE 55
  56. 56. Pipe detection settings Pipe detection settings are divided in: •Pipe detection in swath •Pipe parts creation •Pipe route creation •Steering of swath •5-points settings PAGE 56
  57. 57. 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 freespan Detection depth Min threshold PAGE 57
  58. 58. 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 PAGE 59
  59. 59. 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 PAGE 61
  60. 60. 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 PAGE 62
  61. 61. Dual Head – Single User Interface PAGE 63
  62. 62. 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 10to more than 200 m PAGE 64
  63. 63. PAGE 65
  64. 64. PAGE 66
  65. 65. PAGE 67
  66. 66. Demonstration of Pipe Detection and Tracking PAGE 68
  67. 67. Forward looking systems Basking Sharks PAGE 69
  68. 68. Basking shark (reuzenhaai) • Second largest shark • Eats plankton and opens mouth to eat • Used forward looking system 7128 PAGE 70
  69. 69. 7128 forward looking PAGE 71
  70. 70. PAGE 72
  71. 71. Questions? PAGE 73

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