Related Manuals for Gemini 620pd Profiling
Summary of Contents for Gemini 620pd Profiling
- Page 1 Gemini Profiling System Gemini Profiling System Product Manual 0695-SOM-00001, Issue: 03 0695-SOM-00001, Issue: 03 © Tritech International Ltd.
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Page 2: Tritech International Ltd
Gemini Profiling System © Tritech International Ltd 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. -
Page 3: Table Of Contents
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. - Page 4 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.
- Page 5 Gemini Profiling System 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 ........................
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Page 6: Help & Support
Gemini Profiling System 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:... -
Page 7: Warning Symbols
Gemini Profiling System 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. -
Page 8: Introduction To The System
Gemini Profiling System Part I Introduction to the System 0695-SOM-00001, Issue: 03 © Tritech International Ltd. -
Page 9: Introduction
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. -
Page 10: Using With The Tritech Scu
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. -
Page 11: Example Survey Setup
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. -
Page 12: Integrating With Survey Software
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... -
Page 13: Gemini Profiler Head
Gemini Profiling System Part II Gemini Profiler Head 0695-SOM-00001, Issue: 03 © Tritech International Ltd. -
Page 14: Gemini Profiler Specification
Gemini Profiling System 4. Gemini Profiler Specification 4.1. Dimensions (Forward Facing Unit) Ø145 Not to scale, dimensions in mm. 4.2. Dimensions (Downward Facing Unit) Ø145 Not to scale, dimensions in mm. 0695-SOM-00001, Issue: 03 © Tritech International Ltd. -
Page 15: Acoustic Properties
Gemini Profiler Specification Gemini Profiling System 4.3. Acoustic Properties Acoustic Properties Operating Frequency 620kHz Number of Channels Angular Resolution 1.0° acoustic, 0.5° effective Scanning Sector 130° Number of Beams Vertical Beamwidth 1° Range 1.5 to 120m Scan Rate 2-50Hz (inter-ping time dependent) -
Page 16: Sonar Head Pin-Out Diagrams
Gemini Profiler Specification Gemini Profiling System 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) Function Diagram Ethernet RX + Ethernet RX - Ethernet TX +... -
Page 17: Cable Specification
Gemini Profiler Specification Gemini Profiling System 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. -
Page 18: Rs232 Cable
Gemini Profiler Specification Gemini Profiling System VDSL Cable Specification Burton 55A1-1508 Cable Colour Function & Specification Red (20AWG) DC + Blue UTP#1 (24AWG) VDSL + Black (20AWG) DC Ground (0V) White UTP#1 (24AWG) VDSL - Minimum dynamic bend radius 129mm (static 35mm) 4.7.3. -
Page 19: Offsets
Gemini Profiler Specification Gemini Profiling System 4.8. Offsets The centre line for any offset measurements is considered to be the middle of the receive transducer face as shown. Transmit (TX) Receive (RX) Starboard 0° Port 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... -
Page 20: Gemini Profiler Installation
Gemini Profiling System 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... -
Page 21: Electrical & Communication Notes
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). -
Page 22: Connector Maintenance Guidelines
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. -
Page 23: Care & Maintenance Of The Gemini Profiler
Gemini Profiling System 6. Care & Maintenance of the Gemini Profiler 6.1. After using the sonar Make sure that after using the sonar head that it is washed down with fresh water and check the unit for any signs of obvious damage. Pay particular attention to the transducer head and free any organic matter which has become trapped. -
Page 24: Gemini Hub
Gemini Profiling System Part III Gemini Hub 0695-SOM-00001, Issue: 03 © Tritech International Ltd. -
Page 25: Gemini Hub Specification
Gemini Profiling System 7. Gemini Hub Specification 7.1. Dimensions Gemini Hub Not to scale, dimensions in mm. 7.2. Physical Weight 6.5kg Materials Aluminium and stainless steel Operating Temperature 5 to 40°C Storage Temperature -20 to 50°C Operating Environment Indoor use only. -
Page 26: Pps And Rs232 Connectors
Using cabling provided by Tritech International Ltd it is possible to connect the Ethernet Port K or Port L into an IT infrastructure also (if for example the Gemini Sonar is on the other side of a network hub or switch). These cables are designed such that the power output from the connector is disabled so it is safe to connect into a router or other network device. -
Page 27: Vdsl Configuration
The data from ancillary sensors connected to the PPS port or RS232 ports of the Gemini Hub will be output on Port J so it is essential to make sure that this connection is fed into the computer or network where the sensor data is to be used. -
Page 28: Gemini Hub Installation
The Gemini 620pd is designed to be used as part of a survey system and is supplied with the Gemini Hub unit to enable multiple sensors to be connected through an Ethernet link to an IT infrastructure. -
Page 29: Electrical And Communication
During operation the status of the three ports will be displayed on the front panel of the Gemini Hub. The top row of LEDs are for Link Status - the LED is red for receive and green for transmit. The bottom row is for link speed and is as follows: Port J RED = 10Mbit·s... - Page 30 The port uses a BNC connector and accepts standard 5V TTL PPS (Transistor- Transistor Logic Pulse Per Second) data from a GPS device (the GPS will also have to be connected to a free RS232 port on the Gemini Hub). Earth Point (rear panel) The hub unit is fitted with an earth point on the rear panel.
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Page 31: Care & Maintenance Of The Gemini Hub
Gemini Profiling System 9. Care & Maintenance of the Gemini Hub There are no user serviceable parts within the Gemini Hub and no maintenance should be required. The unit should be operated in a rack mount which is dry, free from excessive dust and has a good supply of cool air. -
Page 32: Gemini Software
Gemini Profiling System Part IV Gemini Software 0695-SOM-00001, Issue: 03 © Tritech International Ltd. -
Page 33: Gemini Software Installation
VDSL link. Before the head can be connected to the network, the IP address of the Gemini needs to be set to a suitable value for that network. The subnet mask needs to be appropriate for the users network and the address chosen. -
Page 34: Check The Operation Of The Gemini Sonar
Gemini Software Installation Gemini Profiling System Gemini Software is then used to change the IP address of the Gemini. The third stage is to reset the IP address of the computer. The final stage is to check the operation of the Gemini head on the network. -
Page 35: Network Configuration
Gemini Profiling System 11. Network Configuration To properly configure the Gemini devices on a network it will be necessary to set the IP addresses of the devices in the correct order otherwise a situation may arise where a particular device is unreachable. If a device does become unreachable then it may be necessary to separate it from the rest of the system to undergo fault finding. -
Page 36: Gemini Software Operation
Profiler mode by selecting Profiler from Configuration Options (on the Advanced screen): When the Gemini software is running, it presents a choice of two screens, which are selected by clicking on the tabs at the top left hand of the screen. The two screens are the User screen and the Advanced screen. -
Page 37: Basic Controls On Advanced Screen
Gemini Profiling System 12.3. Basic Controls on Advanced Screen The cone in the middle of the display will show the sonar image that the Gemini Sonar is producing and the digitised points from the strongest returns. Around this display are the most commonly used controls. The CRP is shown as a small red circle. - Page 38 If the Online button is pressed while no sonars are visible to the Gemini software, the following message will be displayed.
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Page 39: Record Button
Gemini sonar, nor is it possible to open a file whilst another file is already playing. Play Button The Play button is a play/pause control for the file player. - Page 40 Gemini Software Operation Gemini Profiling System Clicking the image will start the file playing and the image will change to a Pause control (two vertical lines). Clicking the image again will pause the file replay and the image will change back to the Play control (triangle).
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Page 41: Capture Screen
When this button is clicked it will take a full screen image of the Gemini software screen. This image is stored as a JPEG image in the Images sub- directory of the log data directory, with a filename of Gemini_nnnn.jpg, where nnnn is an incrementing index number for the image. -
Page 42: Invert Display (Up/Down)
C:\GeminiData, the first WMV file generated would be stored as C: \GeminiData\Images\Gemini_0001.wmv When the WMV file has been captured, the Gemini software will display a message (as below) giving the name of the file. This message will be displayed for five seconds and then will close automatically. -
Page 43: Log Directory Selector
Gemini Software Operation Gemini Profiling System to the zoom button. The magnification level can be changed between 1.5x (minimum magnification)and 40x (maximum magnification). Clicking within the sonar arc will lock the zoom at that point. Clicking outside of the arc will release the lock and the zoomed area will follow the mouse pointer. -
Page 44: Sound Velocity Indicator
12.3.13. Gain Assist By default this is turned on as indicated by green text. When turned on the Gemini will automatically reduce a high gain setting on range lines where bright targets are observed. This improves the clarity of the target, but can give the effect of dark bands in the background image. -
Page 45: Gain Control
The gain slider at the bottom left hand side of the display is used to change the gain level being used by the Gemini Sonar, and is expressed as a decibel value between 0dB (no gain being applied) and 96dB (full gain being applied). -
Page 46: Scan Sector
Gemini Software Operation Gemini Profiling System When the mouse pointer is within the ‘cone’ on the sonar display (that is over the displayed sonar image), the indicators at the bottom right hand side of the screen will show the position of the mouse pointer relative to the origin of the display (that is relative to the CRP). -
Page 47: Measurements
Gemini Software Operation Gemini Profiling System Note If multiple sonars are in use and the scan sector adjustment handles are overlapped by another image, the handle underneath can be accessed by holding down the control key (ctrl) on the keyboard while selecting the handles. -
Page 48: Units
Incorrect sound velocity cannot be corrected with post-processing. The Gemini Profiler can either use a fixed sound velocity (in which case the sound velocity to be used is entered in the Fixed Value box below the sound velocity selector), or use a measured sound velocity. -
Page 49: Compression
Run Length Encoding (RLE) is a technique that is used to compress the image data as it is transferred between the Gemini head and the software, thus reducing the bandwidth required on the connection between the two. RLE in Gemini is a lossy compression technique, a level can be applied which means that all data below that level is set to zero and then the compression is applied. -
Page 50: Inter-Ping
When a Gemini Profiler is online the main display will show an Image and Target rate. Green text means that the actual ping rate has achieved the set inter-ping time and red text means it has not (and is pinging as fast as it is able to). -
Page 51: Beam Setup
620kHz. 12.4.8. Beam Setup The Beam Setup options allow control of the sector which is scanned by the Gemini sonar, this can be useful if the area of interest is quite narrow, such a a pipe trench. -
Page 52: Digitisation
If using survey software that does not have a Tritech specific configuration available then it is possible to emulate a Reson R-Theta or RI-Theta format. For more details of integration of the Tritech Gemini software with survey applications please refer to Chapter 3, Integrating with Survey Software. -
Page 53: Vdsl Settings
Appendix C, Setting the Gemini Device IP Address in Gemini Software describes in detail how the Gemini Sonar network details can be altered to allow it to work with the desired network. Once the sonar has been successfully configured it should not be necessary to change the settings again unless moving to a different infrastructure. -
Page 54: Serial Data Input
Gemini Software Operation Gemini Profiling System If more than one Gemini Sonar is connected and powered, its details will appear on the System Data screen. The currently active sonar will have green text and the dormant sonar(s) will be in yellow. - Page 55 Gemini Software Operation Gemini Profiling System Hub Setup Tab The Hub Setup tab allows configuration of the serial ports on the rear of the Gemini Hub to allow RS232 data to pass through to the Gemini software from external sensors.
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Page 56: Com Ports
The COM ports can be enabled by selecting the Enable Comms button on this tab. Note For survey work it is preferable to connect all serial sensors to the Gemini Hub so that the data can be accurately time stamped. Data received on COM ports can not be time stamped as accurately which may introduce timing errors in the survey results. - Page 57 The incoming data string, check this against the chosen Decode if the data indicator is red. Gemini RS232 The ports on the rear of any connected Gemini heads. This data Ports can be decoded as per the computer COM ports or the data can be routed as an output from one of the computer COM ports (if the data is required on an second computer, for example).
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Page 58: Troubleshooting And Appendices
Gemini Profiling System Part V Troubleshooting and Appendices 0695-SOM-00001, Issue: 03 © Tritech International Ltd. -
Page 59: Troubleshooting
Troubleshooting The software reports that no sonars are detected VDSL System – Check all cabling between Gemini Hub and the sonar and verify that the sonar is powered correctly with appropriate voltage at the sonar. If the VDSL cables are OK and the sonar is operational and the problem will be either the network connection between Gemini Hub and the PC or the network configuration on the PC. - Page 60 All Systems – Some poor quality PC network cards have problems with the large data rate from the Gemini sonar and drop a significant amount of packets. If you have large packet loss, try updated network card drivers and a different brand of network card.
- Page 61 Troubleshooting Gemini Profiling System Gemini software display is choppy or freezes The most likely cause for this is an inadequate graphics card. This will be especially evident if using a laptop computer as the main operating PC and it will be necessary to choose one that has a dedicated graphics chip (the Intel 2000/3000 chips that use part of the main CPU for graphics processing are inadequate).
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Page 62: Setting The Computer Ip Address In Windows Xp
Network Connections. From the list of available network connections that opens, double click on the Ethernet connection which will be used to connect to the Gemini Sonar. Click the Properties button on the dialog which opens. This will open a dialog which looks like this: Scrolling the "This connection uses the following items"... - Page 63 Setting the computer IP address in Windows XP Gemini Profiling System Make a note of the settings as currently used by the computer; these will be needed to restore the computer to any existing network. Refer to the appropriate section of this manual for the correct IP address to use.
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Page 64: Setting The Computer Ip Address In Windows 7
Gemini Profiling System Appendix B. Setting the computer IP address in Windows 7 The following instructions apply to a computer running Windows 7, though the sequence for other operating systems will be similar. Disconnect the computer from any existing network. - Page 65 Setting the computer IP address in Windows 7 Gemini Profiling System A list of attached network devices should now present itself. Find the one which the sonar is to be connected to and double-click on it. The Local Area Connection Properties dialog should be displayed. Find the entry labelled Internet Protocol Version 4 (TCP/IPv4), select it and then click on the Properties button.
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Page 66: Setting The Gemini Device Ip Address In Gemini Software
Gemini devices should be disconnected. Once the ID of the Gemini has been entered at the top of the screen, the details for the new IP address can be entered. Three items need to be entered, the Device ID (to ensure that the correct Gemini is being altered), the new IP Address and the new Subnet Mask. -
Page 67: Gemini Software String Decode
Gemini Profiling System Appendix D. Gemini Software String Decode The Gemini Software is capable of handling input from various different types of sensors using the following standard strings: Name Description Format/Examples GPGGA GPS position $GPGGA... GPGGA ZDA GPS position and UTC time $GPGGA... -
Page 68: Optional Surface Adapters
Appendix E. Optional Surface Adapters The Gemini Profiler can optionally be supplied with either a VDSL or Ethernet adapter to be used with a single Gemini head to allow configuration of the unit. E.1. Dimensions Not to scale, dimensions in mm. -
Page 69: Vdsl Adapter
Optional Surface Adapters Gemini Profiling System Ethernet DC Connector Function Diagram Photograph DC Ground DC + not connected not connected Souriau UTS7124P E.3. VDSL Adapter Sonar Head Connector Function Diagram Photograph DC Ground DC + not connected VDSL + VDSL -... -
Page 70: Glossary
(LANs). Gigabyte = 1000MB Gemini Unless specified this can refer to any of the multibeam sonars in the Gemini range by Tritech International Ltd such as the Gemini Imager (720id), Narrow Beam Imager or Gemini Profiler (620pd). Gemini Hub A rack mountable device capable of driving 2 Gemini sonars and multiple serial sensors and outputting the data to a PC network. - Page 71 Surface Control Unit - a specially manufactured computer which is rack mountable and capable of processing the data from the sonar equipment running either Windows XP Embedded or Windows 7 and Seanet Pro or Gemini software. 0695-SOM-00001, Issue: 03 © Tritech International Ltd.
- Page 72 International System of Units - a system of measurement based on the metric system. Sound Velocity Probe Transistor Transistor Logic - a signal that can be input to the Gemini to trigger advanced functions. Transmit (data) Universal Serial Bus. Coordinated Universal Time (time data closely related to Greenwich Mean Time (GMT)).