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
LMS Width
The LMS Width must be mounted 5 m to 8 m above the ground. The ideal mounting
height is approx. 6 meters, measured from the lower edge of the 2D LiDAR sensor. Take
care to ensure that the mounting height is at least 1 m higher than the maximum vehicle
height.
Design the measuring site so that the angle between the LMS Width and the largest
vehicle to be measured is at least 15°. The size of the angle must not be below this
value, as otherwise it is not possible to capture a network of measuring points with the
necessary density during the vehicle measurement process.
The angular resolution of the LMS Width is 0.5° at a frequency of 75 Hz.
All the 2D LiDAR sensors mounted on the gantry must be in
a single
measuring plane
.
LMS Length
Depending on the system and the application, the LMS Length can either be mounted
to one side or can be mounted on a gantry or cantilever arm. As with the LMS Width, the
permissible mounting height for the LMS Length is 5 m to 8 m above the ground. The
beam must be emitted parallel to the direction of travel.
The crucial factor here is that the LMS Length must always be able to detect the front of
the passing vehicle. It is also essential to observe the detection range of the LMS Length.
If the LMS Length is positioned further down the road, it must be no more than 30 m away
from the measuring gantry.
The angular resolution of the LMS Length is 0.25° at a frequency of 35 Hz.
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It is important to ensure that all the 2D LiDAR sensors have an unobstructed view of
the measuring range at all times.
▸
The 2D LiDAR sensors must always be mounted free of vibrations and oscillations.
3.5.5
Requirements for mounting the axle counting components
The LMS Axle 2D LiDAR sensor must be positioned so that it is able to record the entire
flank of the vehicle and, in particular, the entire axle area. Consequently, it must be
mounted at the side of the lane.
•
The area between the LMS Axle and the vehicle must be free from any optical
obstacles. Please note that items such as guardrails or bushes should not restrict the
scanner’s view.
•
The LMS Axle must be in the same measuring plane (X-axis) as the LMS Width.
•
The LMS Axle must have a good view of the road surface. A good view means that it
must be able to detect as many measurement points on the ground as possible.
Note
Notes
Notes
