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
3.4
System operating principle
3.4.1
Operating principle of vehicle detection
As soon as a vehicle passes through the measurement site, the 2D LiDAR sensors record
its contour.
The 2D LiDAR sensors do this by establishing the measuring range and using a non-
contact process to scan the vehicle. The profiling system does not require any reflectors
or position marks to do this. It is an active system featuring eye-safe infrared lasers.
Fig. 21: Vehicle detectionoperating principle – detection of vehicle contour
The system uses the measurement data obtained to generate a 3D point cloud. Based on
this point cloud, the vehicle class can be determined and the number of axles output.
Fig. 22: Vehicle detection operating principle – 3D point cloud
Any measuring points resulting from environmental influences (such as fog, rain or snow)
that cannot be attributed to the object are suppressed using special filters. This means
that the measurement process can be optimized and refined to a considerable extent,
even in harsh ambient conditions.
Notes