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the Quarryman Pro will assume that a standard rectangular scan is required
As always, the order in which the points are collected does not affect the scan.
When a scan window has been defined, the Quarryman Pro prompts you to take a single shot in the middle of this
window. The scan will not commence until a valid range has been registered. This shot serves two purposes.
•
It is possible to scan scenes covering a horizontal angle of greater than 180°, so this shot is necessary to
resolve the ambiguity about which of two possible areas is to be scanned.
•
When a Chord increment is selected, the range from this single shot is used to calculate the angle which
will need to be subtended in order for the correct chord distance to be achieved.
7.3.2 Scan speed
When a scan is in progress, the laser is observing 250 points per second. This defines the density of points along
a scan line. The data collection speed of the laser cannot be changed.
The only way to change the point spacing along the scan line is to slow the movement of the motors. There is a
Scan Speed
setting in the
FastScan
settings screen.
•
Slow
= 15° per second.
•
Medium
= 17.5° per second.
•
Fast
= 20° per second.
For almost all operations, this setting can be left on the default
Fast
setting. However, if carrying out a scan where
the highest level of detail is required, or where the scene being surveyed is at a very long range, it may be advisable
to select a
Medium
or
Slow
scan speed. The points will still be collected at 250 points per second, but the time it
takes the laser to turn through each degree of arc will increase. In turn, the number of points which are collected
per scan line will increase.
7.3.3 Chord and arc settings
Chord
and
Arc
modes are selected in the
Increment
option in the
FastScan
settings
screen.
The
Increment
defines the spacing between each scan line. This will be the vertical spacing between horizontal
scan lines if a
Horizontal
scan pattern has been selected, or the horizontal spacing between vertical scan lines if a
Vertical
scan pattern has been selected.
The
Arc
setting requires you to select an angular arc value in degrees. Enter this value in the
FastScan
settings
screen. The Quarryman Pro laser module will move this angular distance at the end of each scan line before starting
the next line.
The minimum
Arc
value that the Quarryman Pro will operate at is 0.05°.
Summary of Contents for Quarryman Pro
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