How we build reality - Z+F USA, Inc.

Z+F PROFILER 6007 duo
Data acquisition
Due to the two laser scanning
systems, the overall system
performance is doubled, allowing
the carrier vehicle to travel with
high velocities on the railway net,
still maintaining high scan
resolutions and point densities.
Both laser scanning systems are
synchronized to be able to
achieve a data acquisition rate
of 2 x 508,000 pixels per second
with 2,048 points per captured
profile.
The horizontal and vertical resolutions between two consecutive crosssections
depend on the driven speed:
Speed v
[km/h]/[mp/h]
Rotations per
second
[rps]
Max. no. of
points per
cross-section
Horizontal
resolution 1)
[mm]
50/31 500 2048 27,8 10,7
20/12 500 2048 11,2 10,7
10/6 500 2048 5,6 10,7
5/3 500 2048 2,8 10,7
1) distance between two consecutive measured cross-sections
Vertical resolution at a
distance of 3.5 m to
the scanner-center 2)
[mm]
2) distance between two consecutive measured points within one cross-section
on a surface which is perpendicular to the measuring direction of the laser beam
Synchronization and absolute
positioning
For kinematic laser scanning the
carrier-vehicle's driven trajectory
needs to be determined, using
external navigation sensors. With
this information the captured
two-dimensional measurements
can be processed into georeferenced,
absolute three-dimensional
Cartesian coordinates.
Since those external navigation
sensors are not defined in a
common standard, they are not
integrated in the Z+F PROFILER
6007 duo.
Therefore suitable interfaces for
external synchronisation signals
are provided.
Sensor data as well as scan data
are recorded with unique identifiers
(time stamps or distance
stamps) to be able to synchronize
both data streams.
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