11
•
Pay attention that the signal head or other
obstacle is not obstructing the radar front face
Figure 13: pay attention to obstacles
•
Vehicles that enter within the stop-line zone
(0-10m) from the side (perpendicular
approach) may not be detected (Figure 14). To
validate a measure, the radar needs:
o
to track an approaching movement at
a minimum distance of 8 meters;
o
to measure an approaching movement
above 8 km/h during a minimum of
100ms (the minimum speed can vary
within the detection zone).
Figure 14: side movements
4.2.2
Detection zone
Figure 15 :
Stat movement zone (0-10 m)
/
movement zone
(0-60 m)
, H = 4m, 45°tilt angle.
This drawing shows the theoretical radar lobe for vehicles approaching around 50 kmh. Different “stop-line” length
zones can be set: 10 or 15 m; the approaching zone length is about 60 m for a car and can be limited to 20m.
