3
SYSTEM DESCRIPTION
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8020776/12AX / 2019-05-31|SICK
O P E R A T I N G I N S T R U C T I O N S | Free Flow Profiler
Subject to change without notice
3.2
The system components in detail
3.2.1
2D LiDAR sensors
The 2D LiDAR sensor records the contour of the passing vehicle. To do this, it establishes
a measuring range and scans the vehicle using a non-contact time-of-flight process. The
laser beam is emitted through the inspection window. The scan plane position is indicated
by a housing marking next to the inspection window (see the circle in the figure below).
Fig. 9: System components – 2D LiDAR sensors
A 3D model of the vehicle is generated in the Traffic Controller FPS using the
measurement data that has been obtained. This model then serves as the basis for
further processing (see
3.3.1 Operating principle of vehicle detection
The 2D LiDAR sensor automatically measures contamination on the inspection window.
The level of contamination is displayed directly on the device or displayed via the Traffic
Controller FPS and/or transmitted to the downstream customer system.
For detailed information about the operating principle of the 2D LiDAR sensors, please
refer to the operating instructions for the LMS5xx product family.
3.2.2
Traffic Controller FPS
The Traffic Controller FPS uses the installed profiling software to calculate the vehicle
dimensions, vehicle class, and number of axles. These calculations are based on the
vehicle contour that has been recorded and the position of the vehicle within the lane.
At the same time, the Traffic Controller FPS acts as the central control unit for the profiling
system. Using its TCP/IP Ethernet interface, it constantly provides the downstream
systems with all system data, the measuring points, measurement results, and system
messages.
The TCP/IP interface is also used for set-up, calibration, and fault analysis with the aid of
tools.
Fig. 10: System components – Traffic Controller FPS
Note
