Gemini 620pd Profiling Product Manual

Gemini Profiling System

0695-SOM-00001, Issue: 03

Gemini Profiling System

Product Manual

0695-SOM-00001, Issue: 03

Gemini Profiling System

0695-SOM-00001, Issue: 03

The copyright in this document is the property of Tritech International Ltd. The document is supplied by Tritech International Ltd on the understanding that it may not be copied, used, or disclosed to others except as authorised in writing by Tritech International Ltd.

Tritech International Ltd reserves the right to change, modify and update designs and specifications as part of their ongoing product development programme.

All product names are trademarks of their respective companies.

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0695-SOM-00001, Issue: 03

Table of Contents

Help & Support ........................................................................................................ 6

Warning Symbols ..................................................................................................... 7

I. Introduction to the System ................................................................................... 8

1. Introduction .................................................................................................. 9

1.1. General Overview ............................................................................. 9

1.2. Communications ............................................................................... 9

1.3. Using with the Tritech SCU ........................................................... 10

2. Example Survey Setup .............................................................................. 11

3. Integrating with Survey Software .............................................................. 12

II. Gemini Profiler Head ........................................................................................ 13

4. Gemini Profiler Specification .................................................................... 14

4.1. Dimensions (Forward Facing Unit) ................................................ 14

4.2. Dimensions (Downward Facing Unit) ............................................ 14

4.3. Acoustic Properties ......................................................................... 15

4.4. Electrical and Communications ...................................................... 15

4.5. Physical Properties .......................................................................... 15

4.6. Sonar Head Pin-Out Diagrams ....................................................... 16

4.6.1. Burton 5506-1508 (Main Port) ............................................ 16

4.6.2. Burton 5506-1506 (Auxiliary Port) ..................................... 16

4.7. Cable Specification ......................................................................... 17

4.7.1. Ethernet Cable ..................................................................... 17

4.7.2. VDSL Cable ........................................................................ 17

4.7.3. RS232 Cable ........................................................................ 18

4.8. Offsets ............................................................................................. 19

5. Gemini Profiler Installation ....................................................................... 20

5.1. Installing the Sonar Head ............................................................... 20

5.2. Electrical & Communication Notes ................................................ 21

6. Care & Maintenance of the Gemini Profiler ............................................. 23

6.1. After using the sonar ...................................................................... 23

6.2. If storing the sonar for extended periods ........................................ 23

6.3. Regular maintenance ...................................................................... 23

III. Gemini Hub ..................................................................................................... 24

7. Gemini Hub Specification ......................................................................... 25

7.1. Dimensions Gemini Hub ................................................................ 25

7.2. Physical ........................................................................................... 25

7.3. Electrical and Communication ....................................................... 25

7.3.1. PPS and RS232 Connectors ................................................ 26

7.3.2. Ethernet Configuration ........................................................ 26

7.3.3. VDSL Configuration ........................................................... 27

8. Gemini Hub Installation ............................................................................ 28

8.1. Overview ......................................................................................... 28

8.2. Mounting the Hub .......................................................................... 28

8.3. Electrical and Communication ....................................................... 29

9. Care & Maintenance of the Gemini Hub .................................................. 31

IV. Gemini Software .............................................................................................. 32

10. Gemini Software Installation ................................................................... 33

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10.1. System Requirements ................................................................... 33

10.2. Installing the Gemini Software ..................................................... 33

10.3. Configuring the Gemini Sonar ..................................................... 33

10.3.1. Check the operation of the Gemini sonar .......................... 34

11. Network Configuration ............................................................................ 35

12. Gemini Software Operation ..................................................................... 36

12.1. Getting Ready to Use the Software .............................................. 36

12.2. Keyboard Shortcuts ...................................................................... 36

12.3. Basic Controls on Advanced Screen ............................................ 37

12.3.1. Online Button ..................................................................... 37

12.3.2. Record Button .................................................................... 39

12.3.3. Player Controls .................................................................. 39

12.3.4. Capture Screen ................................................................... 41

12.3.5. Record as .WMV ............................................................... 41

12.3.6. Invert Display (Up/Down) ................................................. 42

12.3.7. Flip Image (Left/Right) ..................................................... 42

12.3.8. Draw Grid .......................................................................... 42

12.3.9. Zoom Button ...................................................................... 42

12.3.10. Log Directory Selector .................................................... 43

12.3.11. Sound Velocity Indicator ................................................. 44

12.3.12. Palette Selector ................................................................ 44

12.3.13. Gain Assist ....................................................................... 44

12.3.14. Gain Control .................................................................... 45

12.3.15. Range Control .................................................................. 45

12.3.16. Indicators .......................................................................... 45

12.3.17. Scan Sector ...................................................................... 46

12.3.18. Measurements .................................................................. 47

12.4. Advanced Controls on Advanced Screen ..................................... 47

12.4.1. Choose and Position the Equipment .................................. 47

12.4.2. Units ................................................................................... 48

12.4.3. Sound Velocity .................................................................. 48

12.4.4. Compression ...................................................................... 49

12.4.5. Inter-ping ............................................................................ 50

12.4.6. Reset to Defaults ............................................................... 50

12.4.7. Gain Settings ...................................................................... 50

12.4.8. Beam Setup ........................................................................ 51

12.4.9. Digitisation ......................................................................... 52

12.4.10. VDSL Settings ................................................................. 53

12.4.11. Modify Device Network Details ...................................... 53

12.4.12. Settings & Display Tabs .................................................. 53

12.5. Serial Data Input ........................................................................... 54

12.5.1. Sensors ............................................................................... 54

12.5.2. Gemini Hub ....................................................................... 54

12.5.3. COM Ports ......................................................................... 56

V. Troubleshooting and Appendices ..................................................................... 58

Troubleshooting .............................................................................................. 59

A. Setting the computer IP address in Windows XP ..................................... 62

B. Setting the computer IP address in Windows 7 ........................................ 64

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C. Setting the Gemini Device IP Address in Gemini Software ..................... 66

D. Gemini Software String Decode ............................................................... 67

E. Optional Surface Adapters ........................................................................ 68

E.1. Dimensions ..................................................................................... 68

E.2. Ethernet Adapter ............................................................................ 68

E.3. VDSL Adapter ............................................................................... 69

Glossary .................................................................................................................. 70

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Help & Support

First please read this manual thoroughly (particularly the Troubleshooting section, if present). If a warranty is applicable, further details can be found in a Warranty Statement at the end of the manual.

Tritech International Ltd can be contacted as follows:

Mail

Tritech International Ltd

Peregrine Road Westhill Business Park Westhill, Aberdeenshire AB32 6JL, UK

Telephone ++44(0)1224 744 111

Fax ++44(0)1224 741 771

Email support@tritech.co.uk

Website www.tritech.co.uk

Prior to contacting Tritech International Ltd please ensure that the following is available:

The Serial Numbers of the product and any Tritech International Ltd equipment connected directly or indirectly to it.

2. Software or firmware revision numbers.

3. A clear fault description.

4. Details of any remedial action implemented.

Contamination

If the product has been used in a contaminated or hazardous environment you must de-contaminate the product and report any hazards prior to returning the unit for repair. Under no circumstances should a product be

returned that is contaminated with radioactive material.

The name of the organisation which purchased the system is held on record at Tritech International Ltd and details of new software or hardware packages will be announced at regular intervals. This manual may not detail every aspect of operation and for the latest revision of the manual please refer to www.tritech.co.uk

Tritech International Ltd can only undertake to provide software support of systems loaded with the software in accordance with the instructions given in this manual. It is the customer's responsibility to ensure the compatibility of any other package they choose to use.

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Warning Symbols

Throughout this manual the following symbols may be used where applicable to denote any particular hazards or areas which should be given special attention:

Note

This symbol highlights anything which would be of particular interest to the reader or provides extra information outside of the current topic.

Important

When this is shown there is potential to cause harm to the device due to static discharge. The components should not be handled without appropriate protection to prevent such a discharge occurring.

Caution

This highlights areas where extra care is needed to ensure that certain delicate components are not damaged.

Warning

DANGER OF INJURY TO SELF OR OTHERS

Where this symbol is present there is a serious risk of injury or loss of life. Care should be taken to follow the instructions correctly and also conduct a separate Risk Assessment prior to commencing work.

Gemini Profiling System

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Part I

Introduction to the System

Gemini Profiling System

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1. Introduction

1.1. General Overview

The Gemini 620pd Profiling sonar is a multibeam echo sounder with a wide field of view and rapid update rate able to provide quick feedback to the user.

The Gemini Hub is a rack mountable interface capable of driving two sonar heads, connecting to a network via Ethernet and bringing in sensor data via RS232.

The Gemini Software is a special application which processes the data from Gemini sonars and is capable of outputting this data across a network to be used within survey software packages.

A Gemini Profiling System will comprise the Gemini Profiler, Gemini Hub and Gemini Software. This manual will detail how to set this system up and cover operation of the Gemini Software. It does not detail how the data from the Gemini System will be used within the survey software.

1.2. Communications

There are two connection options, 100Mbit·s-1 Ethernet and VDSL. The sonar will automatically detect which connection is available and switch to that connection (a different cable is required, see Section 4.7, “Cable Specification”).

The VDSL option allows a single twisted pair to be used for communication to/from the sonar at high speeds dependent on the length and quality of the cable. The Tritech International Ltd supplied VDSL Hub takes the two wire VDSL input and bridges it to Ethernet for simple connection to a PC.

VDSL maximises the data rate by testing the quality of the connection at start up and adapting the speed accordingly. With VDSL there is a trade off between link speed and noise immunity. There is a setting in the software that allows optimisation to cope with the level of noise introduced by other parts of the system. The sonar can cope with some electrical noise on the link but it may reduce the image transfer rate.

Note

When using an Ethernet connection the Gemini can fully utilise a 100Mbit·s-1 link while returning the sonar data. If it is to share an Ethernet link with other high bandwidth devices, such as video cameras, it is recommended that the 100Mbit·s-1 devices share a Gigabit link to the surface to reduce possible network congestion.

Introduction Gemini Profiling System

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1.3. Using with the Tritech SCU

The Tritech International Ltd Surface Control Unit (SCU) is a specially designed rack mountable computer containing embedded software for use with Tritech International Ltd sonar equipment. The Gemini range require a higher specification of hardware than other Tritech products so will only work with the later versions of the SCU from SCUv5 onwards (either Windows XP or Windows 7 versions).

The profiling heads should be connected to the SCU through a Gemini Hub or Ethernet/VDSL adapter.

If integrating the SCU into a network (as illustrated in Chapter 2, Example Survey Setup) then depending on the configuration it may necessary to use a SCU with an additional network interface fitted or use an external network switch.

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2. Example Survey Setup

Note

Tritech International Ltd are able to supply the Gemini Profilers, Gemini Hub and a Surface Control Unit (SCU) but all other hardware shown will be supplied by other manufacturers and is therefore not supported in any depth within this documentation.

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3. Integrating with Survey Software

Documentation is available from Tritech International Ltd detailing the steps necessary to properly integrate the Gemini Profiler system with external survey packages. For advice please contact Tritech International Ltd providing the details for the survey package which is being used or alternatively visit

www.tritech.co.uk

and download the relevant manuals.

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Part II

Gemini Profiler Head

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4. Gemini Profiler Specification

4.1. Dimensions (Forward Facing Unit)

Not to scale, dimensions in mm.

120

318

336

Ø140

225

Ø145

4.2. Dimensions (Downward Facing Unit)

Not to scale, dimensions in mm.

456

474

Ø140

Ø145

170

Gemini Profiler Specification Gemini Profiling System

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4.3. Acoustic Properties

Acoustic Properties

Operating Frequency 620kHz

Number of Channels 96

Angular Resolution 1.0° acoustic, 0.5° effective

Scanning Sector 130°

Number of Beams 256

Vertical Beamwidth 1°

Range 1.5 to 120m

Scan Rate 2-50Hz (inter-ping time dependent)

Range Resolution 10mm (range dependent)

4.4. Electrical and Communications

Electrical and Communications

Power Consumption 37W max (range dependent, head unit only)

Supply Voltage 20 - 75V DC

Data Communications Ethernet (up to 80m) or VDSL (up to 1000m)

VDSL Cable Length

Maximum length for VDSL and power is 300m, if power is provided locally (e.g., by the ROV) then maximum cable length for VDSL communication only is 1000m.

4.5. Physical Properties

Physical Properties

Property Titanium Body

Weight 14.6kg air, 9.5kg water (forward facing unit)

19kg air, 13kg water (downward facing unit)

Depth Rating 4000m

Materials Titanium (6 AL-4V)

Finish Bead blasted

Operating Temperature -10 to 35°C

Storage Temperature -20 to 50°C

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4.6. Sonar Head Pin-Out Diagrams

Note

Pin-out diagrams show pin orientation of the connector face on the sonar head.

4.6.1. Burton 5506-1508 (Main Port)

Pin Function Diagram

1 Ethernet RX +

2 Ethernet RX -

3 Ethernet TX +

4 DC +

5 VDSL +

6 Ethernet TX -

7 DC Ground (0V)

8 VDSL -

5506-1508

4.6.2. Burton 5506-1506 (Auxiliary Port)

Pin Function Diagram

1 RS232 RX

2 RS232 TX

3 DC +

4 DC Ground (0V)

5 RS232/TTL Ground

6 TTL IN

5506-1506

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4.7. Cable Specification

4.7.1. Ethernet Cable

For an Ethernet connection, the supplied cable is described below and should be terminated with an appropriate connector for the intended application.

Note

Ethernet connection requires a shielded cable (of CAT5e standard) for the entire cable run (max 80m), lengths of untwisted cable around connectors must be kept to an absolute minimum. Untwisted lengths will cause poor or intermittent operation.

This should be connected to the Burton 5506-1508 (Main port) on the sonar head.

Ethernet Cable Specification

Burton 55A1-1508 Cable Colour

& Specification

Function

1 Red UTP#2 (24AWG) Ethernet RX +

2 White UTP#2 (24AWG) Ethernet RX -

3 Blue UTP#1 (24AWG) Ethernet TX +

4 Red (20AWG) DC +

6 White UTP#1 (24AWG) Ethernet TX -

7 Black (20AWG) DC Ground (0V)

Minimum dynamic bend radius 130mm (static 36mm)

4.7.2. VDSL Cable

A VDSL connection requires only one twisted pair from the sonar to the surface housed within a 4 core shielded cable.

Note

The signal path should have a characteristic impedance of 110Ω (±10Ω) for the entire cable run for optimal performance.

This should be connected to the Burton 5506-1508 (Main port) on the sonar head.

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VDSL Cable Specification

Burton 55A1-1508 Cable Colour

& Specification

Function

4 Red (20AWG) DC +

5 Blue UTP#1 (24AWG) VDSL +

7 Black (20AWG) DC Ground (0V)

8 White UTP#1 (24AWG) VDSL -

Minimum dynamic bend radius 129mm (static 35mm)

4.7.3. RS232 Cable

The Burton 5506-1506 (Auxiliary port) is designed for use as an interface for auxiliary sensors and is able to provide power and communicate using the RS232 protocol. The cable should be shielded.

RS232 Cable Specification

Burton 55A1-1506 Cable Colour

& Specification

Function

1 Red UTP#2 (24AWG) RS232 RX

2 White UTP#2 (24AWG) RS232 TX

3 Red (20AWG) DC +

4 Black (20AWG) DC Ground (0V)

5 White UTP#1 (24AWG) RS232/TTL Ground

6 Blue UTP#1 (24AWG) TTL In

Minimum dynamic bend radius 130mm (static 36mm)

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4.8. Offsets

The centre line for any offset measurements is considered to be the middle of the receive transducer face as shown.

Port

Receive (RX)

Transmit (TX)

0°Starboard

The view shows the sonar head as it would look from underneath the survey vessel with the front of the vessel at the top of the page, i.e., the sonar transmitter to the fore with the port side correctly aligned on the left.

Note

This offset datum applies to both forward and downward facing variants.

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5. Gemini Profiler Installation

5.1. Installing the Sonar Head

The sonar should be mounted with the transducers facing toward the scene to be profiled (typically the seabed). The scanning sector is orientated with the arc of the transmitter and the vertical beamwidth is at right angles to this arc, such that side and end-on views of the sonar cone are as follows:

For Vessel Installations

The profiling heads can be installed over the side of the survey vessel or within a moon pool if one is available. Installation within a moon pool will provide a more stable operating environment but it must be ensured that the sonar path to the seabed is clear and not obstructed by the vessel hull.

For over the side installation the profiling heads would normally be mounted such that the connector end-cap is facing the stern and have to be mounted to a rigid mounting on the side of the vessel.

Gemini Profiler Installation Gemini Profiling System

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Note

The use of guy lines or flexible fixings is not recommended.

If the fixing mechanism is designed such that the profiling heads can be withdrawn from the water but left in place on the side of the vessel then consideration should be given to the installation of a suitable cover to protect the head when not in use. The head should be clamped securely around the main part of the body tube. Any metallic clamps should be electrically insulated from the sonar body by either rubber or plastic strips or mounting brackets of at least 3 mm thickness and extending at least 3 mm beyond the clamp boundary to reduce any galvanic corrosion effect.

Note

Non-metallic clamps are preferable; if metallic clamps are used they should be painted or lacquered with at least two or three coatings.

For ROV Installations

The sonar heads should be mounted in the correct orientation along the trim of the vehicle and it should have an unrestricted view of the seabed.

The head should be clamped securely around the main part of the body tube. Any metallic clamps should be electrically insulated from the sonar body by either rubber or plastic strips or mounting brackets of at least 3 mm thickness and extending at least 3 mm beyond the clamp boundary to reduce any galvanic corrosion effect.

Note

Non-metallic clamps are preferable; if metallic clamps are used they should be painted or lacquered with at least two or three coatings.

5.2. Electrical & Communication Notes

The unit is designed to be operated either by itself or in tandem with another profiler and both connected to a Gemini Hub unit (full details of the Gemini Hub can be found within Chapter 8, Gemini Hub Installation).

Note

An optional Ethernet or VDSL adapter and test cable can be supplied for deck testing, please contact Tritech International Ltd for more details.

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Connector Maintenance Guidelines

Mating surfaces should be lubricated with 3M Silicone Spray or equivalent, DO NOT GREASE. Connectors must be lubricated on a regular basis. Lubricate O-rings with Dow Corning #111 Valve Lubricant or equivalent. Use Dust Caps and keep connectors clean to prevent damage in storage and service. O-rings can be seriously degraded if exposed to direct sunlight or high ozone levels for extended periods of time. Clean plugs and receptacles with soap and fresh water.

Caution

When attaching a connector make sure that both connector and socket are completely dry. Any water trapped in the connection could result in an electrical short.

Caution

If the Gemini has two ports then the unused port must have a blanking cap fitted prior to immersing in water. Failure to do this will cause permanent damage.

Caution

If using alcohol or IPA to clean out the connector take care that it does not come into contact with any other part of the sonar. If an O-ring is present it should be first removed and discarded and the new O-ring only inserted after the IPA has evaporated.

Ground Fault Monitoring

The power supply within the Gemini includes an electrically isolated DC-DC converter front-end. There is a small capacitive connection between the isolated ground and the sonar chassis which should not noticeably affect any impressed current ground fault indicator (GFI) equipment.

Power

Caution

Never try to make the Gemini work down a long cable by increasing the PSU output voltage above 75V DC.

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Gemini 620pd Profiling Product Manual

Specifications and Main Features

Frequently Asked Questions

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