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Center of the
licence plate
These angles cause a deformation of the image of the vehicle
plate and an increase in the apparent speed of the vehicles in
the images. These consequences could be damaging to the
overall efficiency of the system and should be kept to a
minimum.
Plate viewed with a significant lateral angle.
Plate viewed with a significant vertical angle.
Plate viewed with significant lateral and vertical angles.
Sony strongly recommends not exceed 25° for vertical angle.
Distance between
camera and plates
5 m
10 m
15 m
The lateral angle must be as low as possible by putting the
cameras as close as possible to the road that the vehicles are
travelling on, without risking damage to the cameras or their
support posts by the vehicles controlled. In practice, the
lateral angle must always be inferior to approximately 20° :
Distance between
camera and plates
5 m
10 m
15 m
Combining both lateral angle and vertical angle can't be done
freely. The sum of lateral angle + vertical angle can't exceed
40° . Refer to the following table to get the appropriate angles:
θ
Lateral angle
Vertical angle
α
Maximum height
recommended
2 m
4 m
6 m
Maximum lateral distance
recommended
1,5 m
3 m
5 m
Lateral angle (θ)
0°
5°
15
15
0°
km/h
km/h
15
10
10°
km/h
km/h
0
0
15
km/h
km/h
0
0
20°
km/h
km/h
0
0
25°
km/h
km/h
15 km/h: use of bumps & infrared reflective source is
mandatory. Maximum speed vehicle is 15km/h. 99%
Reliability is not guaranteed.
10 km/h:
use of bumps & infrared reflective source is
mandatory. Maximum speed vehicle is 10km/h. 99%
Reliability is not guaranteed.
0 km/h:
use of a barrier infrared reflective is mandatory.
NO:
The camera reliability will be under 90% with theses
settings; don't install the camera under theses angles.
Excessive lateral angle:
Appropriate lateral angle:
10°
15°
20°
25°
0
0
0
km/h
km/h
km/h
km/h
0
0
0
km/h
km/h
km/h
km/h
0
0
0
km/h
km/h
km/h
km/h
0
0
0
km/h
km/h
km/h
0
0
NO
km/h
km/h
Page 17 / 42
0
0
0
NO
NO
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