Copyright in the whole and every part of this document belongs to Guidance Marine
Limited (the “Owner”) and may not be used, sold, transferred, copied or reproduced in
whole or in part in any manner or form or in or on any media to any person other than
in accordance with the terms of the Owner’s Agreement or otherwise without the prior
written consent of the Owner. “SceneScan” is a registered trademark of Guidance Marine
Ltd. All other brand or product names are trademarks or registered trademarks of their
respective companies or organisations.
Start Up and Shut Down ��������������������������������������������������������������������������������������������10
Start Up ����������������������������������������������������������������������������������������������������������������������������������������������� 10
Shut Down ������������������������������������������������������������������������������������������������������������������������������������������� 10
Main Screen and Bird's Eye View (BEV) ����������������������������������������������������������������������������������������������14
Side Bar ����������������������������������������������������������������������������������������������������������������������������������������������� 16
To Start Tracking ���������������������������������������������������������������������������������������������������������������������������������� 26
To Stop Tracking ���������������������������������������������������������������������������������������������������������������������������������� 26
Adjusting the Scene Reference Point �������������������������������������������������������������������������������������������������� 27
Tracking Lost ��������������������������������������������������������������������������������������������������������������������������������������� 28
Index ��������������������������������������������������������������������������������������������������������������������������� 78
Document History ������������������������������������������������������������������������������������������������������80
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4
Introduction
This section provides an introduction and overview of the SceneScan system.
It contains the following sections:
Welcome (page 6)
•
System Overview (page 7)
•
SceneScan Sensor Part Names (page 8)
•
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5
Welcome
Welcome to the SceneScan User Guide. It explains how to:
• Use the SceneScan system
• Physically install the system
• Install and operate the Dashboard software
• Install the Service Interface
Note: Installation of a SceneScan system should be
!
carried out by a suitably qualied and competent
engineer.
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6
System Overview
The SceneScan System is a high accuracy rotating laser Sensor that provides positional
information to allow automated approach and/or station keeping relative to a structure or
vessel. It is designed to be semi-portable and straightforward to operate.
Its key elements are:
The SceneScan Sensor: The marine grade SceneScan Sensor is mounted on the
•
vessel (typically on the wheelhouse) as required. The SceneScan Sensor emits eye-safe
infrared light and detects the reections received back from one or more designated
structures or vessels.
The SceneScan Client Software: There are two key pieces of software:
•
The SceneScan Service Interface: The SceneScan Service Interface is used
•
for system installation and maintenance.
The SceneScan Dashboard: The SceneScan Dashboard generates a visual
•
representation of the scene detected by the SceneScan Sensor. It gives the
DP Operator control of the system and the data stream being fed to the DP
system.
Both pieces of software run under Windows™ on a Type 3 Marine Processor or other
computer providing the minimum system requirements (See page 55).
The SceneScan system operates dierently to other local position reference systems in that
it does not require any type of target to be placed on the asset that is being approached or
used for station keeping.
It scans the vessel or structure and produces a map. This map is compared to the current
scan by the SceneScan Sensor navigation algorithm, which is used to track a local position.
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7
SceneScan Sensor Part Names
The diagram below shows the key parts of the Sensor unit and the various names that are
used throughout this guide:
Rotor
Optical Window
Power
DP Feed 2
DP Feed 1
Client Data
Base Plate
Access Plate
Sensor Information
Display
Cable Gland Plate
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8
Getting Started
This section contains the following pages:
Start Up and Shut Down (page 10)
•
Targetless Tracking (page 11)
•
Screen Layout (page 13)
•
Tracking Information Quality (page 19)
•
Display Settings (page 20)
•
Vessel Orientation (page 22)
•
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9
Start Up and Shut Down
Start Up
To Start SceneScan Dashboard
1. Ensure that the SceneScan Sensor is powered on.
2. Double-click on the SceneScan Dashboard icon.
(Or run the SceneScan Dashboard from
Start > All Programs > Guidance Marine Ltd >
SceneScan > SceneScan Dashboard).
3. The Dashboard display screen will appear.
If the Sensor is currently suspended, the main part of the
screen will be greyed out. Click on the Resume button
in the side bar in order for the Sensor to begin scanning
and for the results to be displayed on the screen. If the
Sensor was already scanning, then the current scene
will be displayed.
Shut Down
Dashboard screen with Sensor suspendedDashboard screen with Sensor scanning
To Suspend, Exit or Disconnect
1. Click on the Guidance button in the lower left corner of the screen.
This will reveal buttons in the side bar as follows: (see right).
Suspend - Places the Sensor into a ‘sleep mode’. The rotor ceases spinning and the
•
scanner tilt returns to a xed state. The unit can be returned to full operation via a
Resume command from the Dashboard. This mode is suitable for use when travelling
between locations.
Disconnect - Ceases communications between the Dashboard and Sensor and
•
causes the main part of the screen to be greyed out. Does not cause the Sensor to stop
spinning or tracking the scene.
Suspend And Exit - Places the Sensor into the same ‘sleep mode’ as the suspend
•
command (discussed above) and also closes the SceneScan Dashboard program.
Exit - Closes down the Dashboard without aecting the Sensor.
•
Dashboard
In Command
Dashboard
Monitoring
See Multi-Dashboard SceneScan Systems
(page 31) for
information on In
Command/Monitoring
functionality.
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10
Targetless Tracking
Overview of Targetless Tracking
Traditional relative positioning Sensors rely on placing targets on the structure or vessel
which the Sensor then detects and can report a position relative to. SceneScan removes
the requirement to place targets into the scene and instead provides tracking information
relative to natural or man-made structures within the Sensor eld of view. It achieves this
by matching its current observation of the scene against previous observations of the same
scene, in order to determine the motion of the Sensor between observations.
In order to maximise the performance of this approach, the Sensor rst calculates the most
reliable and informative section of the scene to track o. This step is called tilt optimisation,
and involves the Sensor scanning through various sections of the scene to work out which
tilt angle to track at.
Once a suitable section has been selected the system starts tracking and reporting the
position of the Sensor within the scene. As the Sensor moves and the view of the scene
changes, the Sensor will automatically update its model of the scene while tracking without
any need for user intervention.
Blanking Zones
Warning: Before starting tracking it is critical that Blanking Zones have been
!
correctly congured to mask out regions of the scene that we do not wish to
track.
Two types of blanking zone can be congured on a SceneScan system:
Fixed Blanking Zones – These can be exclusively congured using the SceneScan
•
Service Interface. Fixed blanking zones are the Vessel Blanking Zone (Vessel
Parameters) and the Static Blanking Zones.
Operating Blanking Zones – These can be amended in the Dashboard when the
•
system is running, even during tracking. Operating blanking zones are the Dynamic
Blanking Zone and the Minimum Range Filter.
For information on how to set Blanking Zones see the following sections:
Operating Blanking Zones on page 24
•
Vessel Parameters on page 62
•
Static Blanking Zones on page 65
•
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11
Targetless Tracking (Continued)
Tracking Overview
Start Tracking
Once Blanking Zones have been congured the operator can command the Sensor to start
tracking.
SceneScan Tracking is inuenced by the operator’s choice of tilt mode (see the Scanner Tilt
Controls section on page 25 for further information):
Auto - When starting tracking, the scanner will automatically “sweep” through a
•
range of angles to determine the most stable scene for tracking purposes.
Manual - This mode is used to manually tilt the optics to point at the desired part of the
•
scene. When starting tracking, the scanner will use the currently selected angle and no
“sweep” will be performed.
Once a suitable tilt angle has been chosen tracking will start and the scanner tilt angle will
automatically adjust as the range to the asset changes. This is to ensure that the same part
of the scene is used throughout the tracking session.
Scene Reference Point
Once the Sensor has started tracking, it will start reporting its position relative to the Scene
Reference Point.
By default SceneScan will select the centre of the tracked scene for the scene reference
point, with a heading of 0°.
This behaviour should be sucient for most users. However users are also able to edit the
Scene Reference Point, altering both its position and heading. This might be done to align
to the heading of a tracked vessel, or to position oneself against the edge of a platform or
quayside.
Enabling DP Output
Once tracking, the Dashboard will display tracking and scene data, but the Sensor will not
output a DP feed. The reason for this is to allow the operator to review the detected scene,
and to set a Scene Reference Point of their choice before enabling DP Feed output.
When the operator is happy with the tracking data displayed on the Dashboard the DP
output can be enabled and the Sensor will start to report valid position telegrams to the DP
system.
Warning: Changing the Scene Reference Point will disable the DP Feed. This is
done because altering the point can dramatically alter the output from the DP
!
Feeds. The DP Feeds must be re-enabled by following the below procedure.
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12
Screen Layout
The SceneScan Dashboard screen
is split into three distinct sections,
these are:
1. Main Screen and Bird's
•
Eye View (BEV) (see page
14)
2. Side Bar (see page 16)
•
3. Menu Pane (see page
•
18)
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13
Screen Layout (Continued)
Main Screen and Bird's Eye View (BEV)
The circular BEV shows the observable scene and Scene
Reference Point relative to the Sensor and vessel.
The Figure on the right labels elements on the BEV and its
periphery.
Vessel Outline
The Vessel Outline in the centre of the BEV represents the
ship on which the SceneScan system is located, and the red
dot denotes the SceneScan Sensor. The rotating fan-shaped
symbol represents the laser beam emitted by the rotor as it
turns.
The whole BEV can be rotated in steps of 90° to allow for
dierent positions of the monitor. The size and shape of the
vessel outline and the position of the Sensor’s red dot within it
can be congured using the SceneScan Service Interface.
Blanking Zone
The Blanking Zone is an area dened by the user in order
to blank-out parts of the scene that should not be used for
tracking. During each revolution of the Sensor, when the rotor
enters this sector the laser stops pulsing. The Blanking Zone is
adjusted to suit the current operating conditions.
Range Circles
The Range Circles are a visual guide that help to show the
distances between the Sensor vessel and the detected
reections. Distances are given in metres from the centre of
the Sensor.
Radial Markers
Around the circumference of the BEV are marked angles in
degrees, clockwise from the bow of the vessel.
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14
Screen Layout (Continued)
Scene Data
The Scene Data shows the scene detected by the SceneScan Sensor.
Note: The Scene Data can be constrained to a traditional circular BEV, or expanded to ll
the central area using the Toggle BEV Shape button on the Hotkeys Tab, or by pressing
F8.
Scene Reference Point
The Scene Reference Point shows the point within the scene about which SceneScan is
tracking.
Bearing and Heading Tags
The bearing tag and the heading tag are displayed when tracking is in progress, to indicate
the target’s bearing and the vessel heading on the Radial Marker.
Data Logging Indicator
This symbol is displayed when data is being logged to disk.
Zoom Control
Allows a user to zoom in (+) and zoom out (-) of the BEV. Click on the left-hand side of the
control (marked '-') to zoom out of the display and on the right-hand side ('+') to zoom in.
Hotkeys Tab
The Hotkeys Tab is located on the right hand edge of the main pane. Clicking on the tab will
open the Hotkeys Menu.
System Status
This consists of two elds:
Primary
The primary status display is positioned in the upper-right corner of the main pane. It
indicates the current status of the system, for example System Running Normally or System
Suspended.
Secondary
The secondary status display is positioned in the lower-right corner of the main pane. It
displays a ashing message for a number of seconds in order to conrm an action taken
by the user. It can also display a persistent, static message if there is a communications
problem.
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15
Screen Layout (Continued)
Side Bar
The Side Bar, the black pane on the left of the BEV, contains control and display
components in addition to the coordinates panel.
Toggle Coordinate Type
Signal Quality
Coordinate Data
DP Message Format
Current Tilt Mode
and Command Mode
After pressing the
Guidance button:
Start/Stop Tracking Button
(It is always visible for SceneScan)
Guidance Button
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16
Screen Layout (Continued)
Hotkey Buttons
Selecting the Hotkeys tab on the right-hand side of the main
screen activates the Dashboard Hotkeys menu.
The following keys - and the corresponding buttons on the Dashboard Hotkeys menu - act as
shortcuts to application functions.
F1 Display Help Menu
F2 Toggle between the About System pane and the BEV display
F3 Rotates the Vessel Clockwise
F4 Rotates the Vessel Anti-Clockwise
F8 Toggle between displaying a traditional circular BEV or Full Scene mode
F9 Toggle between the day view and night view
F10 Capture a screenshot of the Dashboard interface and save it to disk
F11 Toggle between normal window layout and full screen layout
F12 Toggle between enabling and disabling the on-screen keyboard
Hotkeys Tab
Alt+L Start Manual Data Logging (available when no tracking operation is in progress):
Starts data logging and changes the button to Stop Data Logging
Ctrl + Zoom-In
Ctrl - Zoom-Out
Esc When in operation conrmation mode, cancel the current operation request
Enter When in operation conrmation mode, conrm the current operation request
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17
Screen Layout (Continued)
Menu Pane
The Menu Pane, located across the bottom of the SceneScan Dashboard Screen, is not always visible. It appears when one of the
Tracking, Tilt or Advanced buttons near the foot of the Side Bar are pressed, which causes the Bird's Eye View (BEV) to contract
towards the top of the screen. Clicking the same button for a second time causes the Menu Pane to disappear and the BEV to be
restored to full size.
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18
Tracking Information Quality
Once tracking is under way the Data Quality Bar indicates the level of condence the system has in the quality of the scene data that is being acquired. The greater the size of the lled
portion of the Data Quality Bar, the greater the level of condence in the information.
The colour of the Data Quality Bar and positional data also reects the level of condence: RED, YELLOW or GREEN, with GREEN meaning highest condence.
When tracking, the Data Quality Bar and positional data disappear and are replaced with a warning message if the system loses track of the scene.
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19
Display Settings
To provide ample visibility during daytime operation and to limit glare during night shifts,
SceneScan Dashboard oers two display settings: Day Mode and Night Mode. In either
mode the brightness can be further adjusted by the Screen Brightness control.
To change day/night mode and adjust brightness:
1. Navigate to Advanced > Display Options > Display Settings.
2. Click on one of the Day / Night Mode symbols.
3. Click on the left side of the Screen Brightness control to dim the screen and on the
right to make it brighter.
Alternatively, to toggle between day and night mode, use the keyboard shortcut F9 or the
Toggle Day/Night Mode button in the Dashboard Hotkeys panel.
Day Mode
Night Mode
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20
Display Settings (Continued)
The central BEV can be toggled between a traditional circular BEV, and a full scene mode.
Press F8 to toggle modes, or use the Toggle BEV Shape hotkey. The latter is useful when
viewing complex scenes such as harbours.
The BEV can be further expanded to a full screen mode by pressing F11, or using the
Toggle Full Screen hotkey
This mode maximises the space available for tracking. Whilst this removes the Side Bar from
view, it can be restored by pressing F11 again, or clicking the Tab along the left edge of the
screen.
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21
Vessel Orientation
SceneScan Dashboard supports four dierent layouts of the Bird’s Eye View so that the
operator can choose the one which best represents the vessel’s surroundings.
To set Vessel Orientation
1. Navigate to Advanced > Display Options > Layout.
2. Click on the vessel outline that points in the required direction.
Note: Changes made to the vessel orientation using the Dashboard are temporary
and will revert back to the default setting when the Dashboard is restarted� The
default orientation can by changed from within the SceneScan Service Interface�
Note: This is a Dashboard display function only and will not affect the DP output�
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22
Tracking Basics
This section contains the following pages:
Dynamic Blanking Zone (page 24)
•
Scanner Tilt Controls (page 25)
•
Tracking (page 26)
•
Positional Display Modes (page 29)
•
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23
Operating Blanking Zones
Dynamic Blanking Zone
The Dynamic Blanking Zone is used to mask a segment of the scan rotation. When the
scanner passes through the dynamic blanking zone, the laser is switched o to prevent any
unwanted reections.
N.B. Even if the Sensor has a clear 360° view, there must be a dynamic blanking zone of
at least 23°. The user interface will not allow smaller blanking zones.
Generally the dynamic blanking zone will not need to be changed. However, there may be
occasions when it is necessary to adjust the dynamic blanking zone, for example to mask
out another vessel in the Sensor eld of view..
Note: Up to four additional static blanking zones can be congured from within the
SceneScan Service Interface. These are used to mask segments of the scan rotation that
are obscured by the vessel’s superstructure. See the Static Blanking Zones section on page
64 for further information.
Setting the Dynamic Blanking Zone
The start and end of the zone can be set to any positions around the circle to the nearest
degree, subject to the minimum and maximum sizes of the zone (see red box below).
To dene the Dynamic Blanking Zone
The Dashboard needs to be in Command Mode to make changes to the dynamic blanking
zone.
1. Click one of the dynamic blanking zone handles and, holding down the left mouse
button, drag to the desired position. Alternatively - on a touchscreen - touch and drag.
As the handle is moved, its current position (in degrees clockwise from the vessel bow)
is displayed in blue numerals outside the perimeter of the circle.
2. If required, drag the second zone handle in the same way.
3. The Apply-Cancel buttons will have popped up after step 1. Click on the Apply button
to set the dynamic blanking zone, or on Cancel to restore the dynamic blanking zone to
its previous state.
The Dynamic Blanking Zone must cover at least 23° but no more than 337°. The
user interface will not allow larger blanking zones. It is not possible to change the
blanking zone when in full screen mode.
Range Filters
The Range Filters function on the Power menu allows
the user to set minimum range. Any objects at a shorter
range than the range threshold will no longer be visible
to the Sensor and so will be excluded from tracking. This
mechanism is useful when a structure/vessel other than that
being used for tracking cannot be eliminated by means of the
dynamic blanking zone function alone. It can be used at any
time, even during tracking.
The range threshold can be adjusted between 1 and 70
metres by clicking on the end of the lter bar marked ‘+’ or ‘-’
as required. A corresponding exclusion zone is shown in the
centre of the BEV.
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24
Scanner Tilt Controls
The scanner tilt mechanism automatically compensates for the pitch and roll of the vessel
caused by wave motion.
Motion Sensors and a tilting optics mechanism ensure that the scanning optics remain at
the correct level to see the scene.
16° Scanner Tilt
Scanner Tilt Modes
The scanner can be operated in either of the following tilt modes:
Auto - When starting tracking, the scanner will automatically “sweep” through a range of
•
angles to determine the most stable scene for tracking purposes.
Manual - This mode is used to manually tilt the optics to point at the scene. For
•
example, when station-keeping close to a platform where the superstructure is high up
and the SceneScan beam must be tilted upwards. When starting tracking, the scanner
will initially use the currently selected angle. No “sweep” will be performed. Manual Tilt
can also be used to visually survey the scene around the vessel without tracking.
Once a suitable tilt angle has been chosen tracking will start and the scanner tilt angle will
automatically adjust as the range to the asset changes. This is to ensure that the same part
of the scene is used throughout the tracking session.
When the Sensor is rebooted the tilt mode defaults to Auto.
The current tilt mode and leveller angle are displayed in the ‘Tilt Mode’ section of the Side
Bar.
To change the scanner tilt mode and leveller angle
1. Click on the Tilt button in the Side Bar.
2. Select the required mode and click on the Apply button to conrm.
3. Click on the +/- buttons to adjust the angle.
4. Click on the Apply button to conrm your changes.
Once the scanner starts tracking, it is not possible to change the tilt mode or leveller
angle
Sidebar Tilt Mode section
Tilt Mode Selection
Spirit Level
The Spirit Level control, on the left hand side of the Tilt
pane, displays the roll and pitch of the vessel as measured
by the Vertical Reference Unit within SceneScan. The
graphical display represents the roll and pitch angles in the
same manner as a bull’s eye spirit level. The current values
are displayed in text at the bottom of the control. A ship
outline is shown in the background to indicate orientation
relative to the vessel.
20° Scanner Tilt
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