3
SYSTEM DESCRIPTION
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8017768/12AX/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 | TIC
Subject to change without notice
If tracking with the LMS Length is not possible – for example because the vehicle changes
lanes or does not drive under the 2D LiDAR sensor – length and speed can only be
calculated from the 3D point cloud with low accuracy.
3.4.1.2
Operating principle of the TIC501
The 2D LiDAR sensor aligned to the lane at an angle of 20 to 40° is used to record the
vehicle profile. The speed and the length are also calculated from the profile recording.
The recording process starts as soon as a vehicle is detected by the 2D LiDAR sensor. The
recording process stops when the 2D LiDAR sensor detects the final point on the vehicle.
Fig. 25: Operating principle of TIC501 vehicle detection – LMS Width
3.4.2
Operating principle of the vehicle classification
The Traffic Controller combines the individual 2D sections of the vehicle. A 3D point cloud
is generated taking into account the speed and respective position of the vehicle on the
measured section.
The vehicle is classified on the basis of the 3D point cloud.
Fig. 26: Operating principle of vehicle classification
Classification criteria
The classification criteria are defined by the choice of category system. The category
system depends on the local conditions that apply in the country where the profiling
system is being used.
Note