IMAGENEX 881A-GS User manual

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: [phone]
Fax: [phone]
[e-mail]
www.imagenex.com

Revision History
Number 430-044
Revision Date Description
0A 05-Apr-21 For internal review
00 23-Apr-21 For distribution

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Table of Contents
1. Introduction ...............................................................................................................................................10
2. 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. Additional Information ...........................................................................................................................19
2.3.5. Acquiring Targets ..................................................................................................................................20
2.3.6. Heading, Range, Bearing .....................................................................................................................21
2.3.7. Compass Tape Display .........................................................................................................................22
2.3.8. ROV Overlay .........................................................................................................................................22
3. Software Menus ........................................................................................................................................23
3.1. File ............................................................................................................................................................23
3.1.1. File > Connect to Sonar Head ..............................................................................................................23
3.1.2. File > Open File to Playback .................................................................................................................23
3.1.3. File > Plot data from UDP .....................................................................................................................23
3.1.4. File > Record Start (Stop)… / Copy Start (Stop)… ...............................................................................23
3.1.5. Set Record Directory ............................................................................................................................23

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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. View > Hold ...........................................................................................................................................24
3.2.2. View > Reverse .....................................................................................................................................24
3.2.3. View > Clear Screen .............................................................................................................................24
3.2.4. View > Zoom Factor ..............................................................................................................................24
3.2.5. View > Zoom In .....................................................................................................................................25
3.2.6. View > Zoom Out ..................................................................................................................................25
3.2.7. View > Grid ...........................................................................................................................................25
3.2.8. View > Range Marker ...........................................................................................................................25
3.2.9. View > Color Indicator...........................................................................................................................25
3.2.10. View > Compass Display ..................................................................................................................25
3.2.11. View > ROV OverlayToggles the ROV Overlay on / off (see Figure 8 ROV Overlay). ....................25
3.2.12. View > Main Toolbar .........................................................................................................................25
3.2.13. View > Mini Settings Bar ...................................................................................................................25
3.2.14. View > Show Sonar Settings ............................................................................................................26
3.3. Color Table ...............................................................................................................................................26
3.4. System ......................................................................................................................................................27
3.4.1. System > Choose COM Ports ..............................................................................................................27

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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. Options > Measure Target ....................................................................................................................30
3.5.3. Options > RealTime Play Speed ..........................................................................................................31
3.5.4. Options > Enable Gyro .........................................................................................................................31
3.5.5. Options > Calibrate Gyro ......................................................................................................................31
3.5.6. Options > Enable Gyro Auto Bias .........................................................................................................32
3.5.7. Options > Set Heading Reference ........................................................................................................33
3.5.8. Options > Calibrate Compass ...............................................................................................................33
3.5.9. Options > Calibrate Motor .....................................................................................................................34
3.5.10. Options > Local Lat / Compass Declination......................................................................................34
3.6. Profile ........................................................................................................................................................34
3.6.1. Profile > Off ...........................................................................................................................................34
3.6.2. Profile > Points Only .............................................................................................................................34
3.6.3. Profile > Low Mix ..................................................................................................................................34
3.6.4. Profile > Medium Mix ............................................................................................................................34
3.6.5. Profile > High Mix ..................................................................................................................................34
3.6.6. Profile > Point Size ...............................................................................................................................35

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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. GPS > Erase GPS Tracks ....................................................................................................................38
3.7.4. GPS > Zoom In .....................................................................................................................................39
3.7.5. GPS > Zoom Out ..................................................................................................................................39
3.8. Video .........................................................................................................................................................39
3.8.1. Video > Open Video Window ................................................................................................................39
3.8.2. Video > Record Video Frames to File ...................................................................................................39
3.9. Help ...........................................................................................................................................................39
3.9.1. Help > Help… .......................................................................................................................................39
3.9.2. Help > About… .....................................................................................................................................39
4. Additional Documentation .........................................................................................................................40
APPENDIX A Hot Keys ...................................................................................................................................41
APPENDIX B Cable Diagram (881L and 881A) ..............................................................................................43
APPENDIX C Spec Sheets ..............................................................................................................................46

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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. ......................................................................................................................................28
Figure 10 Transducer Down. ...............................................................................................................................28
Figure 11 Zero Down. ..........................................................................................................................................35
Figure 12 Auto Profile ..........................................................................................................................................38

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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

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Acronyms and Abbreviations
Acronym Definition
ASCII American Standard Code for Information Interchange
dB Decibel
ES Echo Sounder
GB Gigabyte
GPS Global Positioning System
GS Gyro Stabilized
IP Internet Protocol
kHz Kilohertz
m/s Meters per second
MHz Megahertz
NMEA National Marine Electronics Association
PC Personal Computer
RAM Random Access Memory
ROV Remotely Operated Vehicle
TB Terabytes
UDP User Datagram Protocol
USB Universal Serial Bus
VDC Volts Direct Current

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1. INTRODUCTION
The Model 881A-GS and 881L-GS (hereafter called 881A/L-GS) are advanced mechanical scanning, gyro-
stabilized, high-resolution imaging or profiling sonar systems that have been designed to provide simple, reliable,
and accurate representation of underwater targets. The 881A-GS is a serial device and the 881L-GS is
connected via ethernet. Gyro stabilization means that the sonar is capable of crystal-clear visualization from
moving ROVs without the blurring effects of host vehicle rotation. An advanced, low drift gyro is integrated
directly into the sonar head, so the sonar can now compensate for vehicle motion in real time with accuracy and
stability. Gyro stabilization is very useful to ROV pilots when working in close proximity to targets. Both units
contain a magnetic compass and a gyro that work together to deliver a robust heading reference even in areas
of high magnetic interference.
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)…).
Both sonars contain a pitch and roll sensor that is used to apply pitch and roll values to the sonar data when
creating an XYZ output.
The sonars come with a free Windows® program that is used to interface with the sonar, control settings, log and
play back data.