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IMAGENEX 881A-GS User Manual

Gyro stabilized scanning sonar (serial / ethernet version)
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IMAGENEX TECHNOLOGY CORP.
MODEL 881A/L-GS
GYRO STABILIZED SCANNING SONAR
(SERIAL / ETHERNET VERSION)
USER MANUAL
Imagenex Technology Corp.
209-1875 Broadway Street
Port Coquitlam, BC
Canada V3C 4Z1
Telephone: (604) 944-8248
Fax: (604) 944-8249
info@imagenex.com
www.imagenex.com

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  • Page 1 IMAGENEX TECHNOLOGY CORP. MODEL 881A/L-GS GYRO STABILIZED SCANNING SONAR (SERIAL / ETHERNET VERSION) USER MANUAL Imagenex Technology Corp. 209-1875 Broadway Street Port Coquitlam, BC Canada V3C 4Z1 Telephone: (604) 944-8248 Fax: (604) 944-8249 info@imagenex.com www.imagenex.com...
  • Page 2 Revision History Number 430-044 Revision Date Description 05-Apr-21 For internal review 23-Apr-21 For distribution...

  • Page 3: Table Of Contents

    881A/L-GS Scanning Sonar Table of Contents Introduction ...............................10 Getting Started ............................12 2.1. Hardware Installation ..........................13 2.1.1. Personal Computer ..........................13 2.1.2. Sonar Considerations ...........................14 2.2. Software Setup ............................15 2.3. Interface ..............................16 2.3.1. Shortcut Buttons ...........................17 2.3.2. File Playback............................18 2.3.3. Sonar Settings ............................18 2.3.4.
  • Page 4 881A/L-GS Scanning Sonar 3.1.6. File > Auto Save File Names ........................23 3.1.7. File > Auto File Size ..........................23 3.1.8. File > Convert 81R File to xyz… ......................24 3.1.9. File > Save Screen ..........................24 3.1.10. File > Exit ............................24 3.2. View ................................24 3.2.1.
  • Page 5 881A/L-GS Scanning Sonar 3.4.2. System > IP Address ..........................27 3.4.3. System > Diagnostics ...........................27 3.4.4. System > Sound Velocity ........................27 3.4.5. System > Sonar Orientation .........................28 3.4.6. System > Sonar Type ...........................30 3.5. Options ..............................30 3.5.1. Options > Units .............................30 3.5.2.
  • Page 6 881A/L-GS Scanning Sonar 3.6.7. Profile > Zero Down ..........................35 3.6.8. Profile > Profile Min Range ........................35 3.6.9. Profile > Auto Profile > Horizontal Scan (Borehole)… ................35 3.7. GPS ................................38 3.7.1. GPS > Enabled .............................38 3.7.2. GPS > Track Plotter ..........................38 3.7.3.
  • Page 7 881A/L-GS Scanning Sonar Figures Figure 1 External View ............................14 Figure 2 Software User Interface (File Playback)....................16 Figure 3 Sonar Settings ............................18 Figure 4 Additional Information..........................19 Figure 5 Acquiring Targets ..........................21 Figure 6 Bottom Left ............................21 Figure 7 Compass Tape Display .........................22 Figure 8 ROV Overlay ............................22 Figure 9 Transducer Up.
  • Page 8 881A/L-GS Scanning Sonar Tables Table 1 General Features ............................11 Table 2 Adapters ..............................13 Table 3 External Hardware ..........................14 Table 4 Shortcut Buttons .............................17 Table 5 Playback Control ............................18 Table 6 Reference Table .............................20 Table 7 Color Table .............................26 Table 8 Conventions ............................30 Table 9 Additional Document ..........................40 Doc No: 430-044-00 Page 8 of 46...
  • Page 9 881A/L-GS Scanning Sonar Acronyms and Abbreviations Acronym Definition ASCII American Standard Code for Information Interchange Decibel Echo Sounder Gigabyte Global Positioning System Gyro Stabilized Internet Protocol Kilohertz Meters per second Megahertz NMEA National Marine Electronics Association Personal Computer Random Access Memory Remotely Operated Vehicle Terabytes User Datagram Protocol...

  • Page 10: Introduction

    Both units deliver a high level of performance with the 881L-GS ethernet unit able to transfer data at a higher data rate. A profiling version of the 881A-GS has been tailored for use in a borehole surveying role and contains features for auto scanning boreholes (see 3.6.9 Profile > Auto Profile > Horizontal Scan (Borehole)…).

  • Page 11: Table 1 General Features

    881A/L-GS Scanning Sonar The general features are: 310 kHz, 675 kHz, or 1 MHz (standard default settings) -Other Frequency frequencies can be selected through programmable software configurations (Tunable from 280 kHz to 1.1 MHz in 5 kHz steps) Transducer Imaging type, fluid compensated Range Resolution 1 m –...

  • Page 12: Getting Started

    Ensure 24 VDC (1A minimum) power supply is off.  Configure the network card’s IP address or COM port when using 881L-GS and 881A-GS respectively. (see Sections 3.4.2 System > IP Address and 3.4.1 System > Choose COM Ports) ...

  • Page 13: Hardware Installation

     If an 881A-GS is used – an available RS-485 or RS-232 (depending on the type of receiver) port is required. If no COM port is present on the PC, an RS-485 to USB adaptor or an RS-232 to USB adaptor is used.

  • Page 14: Sonar Considerations

    881A/L-GS Scanning Sonar 2.1.2. Sonar Considerations Figure 1 External View FRAGILE. This area must not be obstructed. Do not attach any brackets or fastenings to this area. Ensure locking sleeve is used. Do not bend pins. Do not remove. Represents moving transducer zero position. Use this area to mount the sonar.

  • Page 15: Software Setup

    2.2. SOFTWARE SETUP The latest version of the Win881AL_GS program is available from the Imagenex Technology Corp. website (https://imagenex.com/interior-page/software-download). The installation of the software on the PC is straightforward. It can be installed in its own directory, and run by double clicking, or you can create a shortcut from the desktop for it.

  • Page 16: Interface

    881A/L-GS Scanning Sonar 2.3. INTERFACE Range Playback Bar Shortcut Buttons Freq / Gain Gyro Status Sonar Heading Figure 2 Software User Interface (File Playback) Doc No: 430-044-00 Page 16 of 46...

  • Page 17: Shortcut Buttons

    881A/L-GS Scanning Sonar 2.3.1. Shortcut Buttons Connect to a physical sonar head. Open a File play-back session. Start / Stop recording an 81R data file. Scan in polar mode which means the sonar will do 360° rotations. Direction (C/W CC/W) is toggled by clicking Scan in a sector defined by the Sector setting.

  • Page 18: File Playback

    881A/L-GS Scanning Sonar 2.3.2. File Playback Table 5 Playback Control Used during playback and allows the user to adjust the playback speed and file position. 2.3.3. Sonar Settings Used to control various sonar attributes. Only available in real-time mode: Figure 3 Sonar Settings ...

  • Page 19: Additional Information

    881A/L-GS Scanning Sonar 2.3.4. Additional Information Figure 4 Additional Information Doc No: 430-044-00 Page 19 of 46...

  • Page 20: Acquiring Targets

    881A/L-GS Scanning Sonar Description Display current acoustic range and frequency of sonar in yellow. Displays grid scale and current gain in orange. Gyro enabled / disabled in green. Displays only when Gyro Stabilized Image is enabled. One of: North Up, Heading Up, or Target Steering. Displays “Not Recording”...

  • Page 21: Heading, Range, Bearing

    881A/L-GS Scanning Sonar Acquire Target was selected and the mouse cursor changed The desired target was selected. The screen automatically to the selection cursor. The target cursor is positioned over centred the target within a sector and rotated the sector to the target of interest and once clicked, >>...

  • Page 22: Compass Tape Display

    881A/L-GS Scanning Sonar 2.3.7. Compass Tape Display Enable View > Compass Display. Displays the current heading as a moving tape display: Figure 7 Compass Tape Display 2.3.8. ROV Overlay Displays the ROV overlay if View > ROV Overlay is selected. Size can be adjusted by using the Z speed key, which toggles through various size options.

  • Page 23: Software Menus

    881A/L-GS Scanning Sonar 3. SOFTWARE MENUS 3.1. FILE 3.1.1. File > Connect to Sonar Head Select data source to be from the sonar head and viewed in real-time. 3.1.2. File > Open File to Playback Data can be replayed from a previously recorded file from the Open File dialog box. 3.1.3.

  • Page 24: File > Convert 81R File To Xyz

    881A/L-GS Scanning Sonar 3.1.8. File > Convert 81R File to xyz… Converts an 81R data file to an ASCII text XYZ file. X and Y are the output from a polar to rectangular conversion, and z is calculated from the Auto Profile settings (see 3.6.9 Profile > Auto Profile). X,Y and Z values are corrected for pitch and roll.

  • Page 25: View > Zoom In

    881A/L-GS Scanning Sonar 3.2.5. View > Zoom In Shortcut button: Zooms in by the factor specified in Zoom Factor. 3.2.6. View > Zoom Out Shortcut button: Zooms out by the factor specified in Zoom Factor. 3.2.7. View > Grid Choose between None, Rectangular and Polar grids. 3.2.8.

  • Page 26: View > Show Sonar Settings

    881A/L-GS Scanning Sonar 3.2.14. View > Show Sonar Settings Realtime only. Toggles a display window on / off that shows various sonar settings and allows the setting of the head ID. The head IDs have been programmed into the sonar at default 16. Care should be taken when changing this value as it may lead to loss of communication.

  • Page 27: System

    Allows for the configuration of communication ports: If an 881A-GS is being used, the sonar communication port parameters are set in the Sonar Head section. The Sonar Head configuration is not relevant with 881L-GS as it is connected via ethernet.

  • Page 28: System > Sonar Orientation

    881A/L-GS Scanning Sonar 3.4.5. System > Sonar Orientation Realtime only. Select Up if sonar orientated with red polyurethane housing (transducer) towards the top and Down if inverted. (See Figure 9 and Figure 10). Note that although the unit is rotated through 180° the pitch, roll and heading sensors will be corrected for sign conversion in both orientations.
  • Page 29 881A/L-GS Scanning Sonar Orientation Axis Convention (Compass North = Diagram Forward) Pitch - Rotating + = Pitch Up around axis A (into the page) Transducer Up Roll – Rotating around Axis B + = Starboard Down (into the page) Doc No: 430-044-00 Page 29 of 46...

  • Page 30: System > Sonar Type

    Not applicable Table 8 Conventions 3.4.6. System > Sonar Type Realtime only. Various models of sonar use the same interface software. Select 881A-GS or 881L-GS depending on model. 3.5. OPTIONS 3.5.1. Options > Units Meters or feet can be selected as the units used.

  • Page 31: Options > Realtime Play Speed

    881A/L-GS Scanning Sonar 3.5.3. Options > RealTime Play Speed Playback only. Limits the playback speed to the same speed as what was used when data was acquired. 3.5.4. Options > Enable Gyro Enables the internal gyro to be used in North Up, Heading Up and Target Steering and Acquire Target mode. 3.5.5.

  • Page 32: Options > Enable Gyro Auto Bias

    881A/L-GS Scanning Sonar  Suspend sonar operations, and mount the sonar on a level stable surface, or settle the ROV on a flat bottom.  Select Options > Calibrate Gyro.  The message Calibrating Gyro will appear. Calibration takes approximately 30 seconds. ...

  • Page 33: Options > Set Heading Reference

    881A/L-GS Scanning Sonar 3.5.7. Options > Set Heading Reference Realtime only. Manual and Automatic are generally used when the sonar is used in borehole survey applications, and not when it is used, for example, as an imager mounted on an ROV. If the sonar is used as an imager, Disable should be selected.

  • Page 34: Options > Calibrate Motor

    881A/L-GS Scanning Sonar 3.5.9. Options > Calibrate Motor Realtime only. Calibrates the motor and realigns the sonar head position relative to the transducer position. This can be done periodically to remove unwanted drift. 3.5.10. Options > Local Lat / Compass Declination Realtime only.

  • Page 35: Profile > Point Size

    Profile > Auto Profile > Horizontal Scan (Borehole)… Realtime only. 881A-GS Profiler Only. Used to generate the Z (depth) component of the XYZ files via an auto increment function. This allows the user to set the expected depth increment for successive scans and if the sonar is paid out to these increments, a realistic profile will be generated of the internal surface of the borehole.
  • Page 36 881A/L-GS Scanning Sonar This will set a reference angle which is used for subsequent scans to minimize heading changes during the generation of the XYZ output files. The sonar should be running in North Up mode. The procedure detailed below should be followed prior to commencing auto profile scans.
  • Page 37 881A/L-GS Scanning Sonar A typical deployment procedure is detailed below:  An 81R file logging session is started.  The sonar is lowered on a marked cable to some predetermined depth.  Auto Profile Enabled is checked (see Figure 12). ...

  • Page 38: Gps

    881A/L-GS Scanning Sonar Do not re-calibrate compass, gyro or motor between scans. To terminate the process, uncheck Auto Profile Enable and click OK, or click Cancel. Figure 12 Auto Profile 3.7. 3.7.1. GPS > Enabled Realtime only. If a GPS receiver is connected via a comm port, it may be enabled and disabled here. 3.7.2.

  • Page 39: Gps > Zoom In

    881A/L-GS Scanning Sonar 3.7.4. GPS > Zoom In Realtime only. Zooms in on the track plot. Meters / feet per division is shown in the track-plot window. 3.7.5. GPS > Zoom Out Realtime only. Zooms out on the track plot. Meters / feet per division is shown in the track-plot window. 3.8.

  • Page 40: Additional Documentation

    881A/L-GS Scanning Sonar 4. ADDITIONAL DOCUMENTATION Document Number Description 410-013 USB Converters and the Windows OS 430-054 881L Ethernet Troubleshooting Guide Table 9 Additional Document Doc No: 430-044-00 Page 40 of 46...

  • Page 41: Appendix A Hot Keys

    881A/L-GS Scanning Sonar APPENDIX A HOT KEYS Doc No: 430-044-00 Page 41 of 46...
  • Page 42 881A/L-GS Scanning Sonar Doc No: 430-044-00 Page 42 of 46...

  • Page 43: Appendix B Cable Diagram (881L And 881A)

    881A/L-GS Scanning Sonar APPENDIX B CABLE DIAGRAM (881L AND 881A) Doc No: 430-044-00 Page 43 of 46...
  • Page 44 881A/L-GS Scanning Sonar Doc No: 430-044-00 Page 44 of 46...
  • Page 45 881A/L-GS Scanning Sonar Doc No: 430-044-00 Page 45 of 46...

  • Page 46: Appendix C Spec Sheets

    881A/L-GS Scanning Sonar APPENDIX C SPEC SHEETS Doc No: 430-044-00 Page 46 of 46...
  • Page 47 200 m radius, 360° surrounding area. The Model 881A-GS still has low power, simple set- up, and small size that make it an ideal tool for large work ROV’s and small inspection vehicles. On it’s own it is now an...
  • Page 48 1000 m unit: 1.6 kg (3.5 lbs) 3000 m unit: TBA In Water 1000 m unit: TBA 3000 m unit: TBA MATERIALS 1000 m unit: 6061-T6 Aluminum & Polyurethane 3000 m unit: Titanium, Polyurethane & 300 series stainless steel FINISH Hard Anodize 881A-GS Imaging 445-093 www.imagenex.com...
  • Page 49 3000 m UNIT Standard 881-000-401 RS-232 Option -006 End mount connector Option -009 Right angle connector Option -010 Gyro Stabilization Option -048 Product and company names listed are trademarks or trade names of their respective companies. 881A-GS Imaging 445-093 www.imagenex.com...
  • Page 50 Drop sonar • • Orientation module Scientific Research Gyro-stabilization of the Imagenex Model 881L-GS makes the high resolution 881L sonar into a system capable of crystal clear visualization of the ocean environment from moving platforms, no longer compromised by the blurring effects of host vehicle rotation.
  • Page 51 1000 m unit: 1.8 kg (4 lbs) 3000 m unit: TBA In Water 1000 m unit: TBA 3000 m unit: TBA MATERIALS 1000 m unit: 6061-T6 Aluminum & Polyurethane 3000 m unit: Titanium, Polyurethane & 300 series stainless steel FINISH Hard Anodize 881L-GS Imaging 445-092 www.imagenex.com...
  • Page 52 IP Address* Option -020 Gyro Stabilization Option -048 *Note: Standard IP Address is 192.168.0.5 A different IP Address may be specified upon ordering. Product and company names listed are trademarks or trade names of their respective companies. 881L-GS Imaging 445-092 www.imagenex.com...

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