Product Manual

8
INSTALLATION
RADAR INSTALLATION & ALIGNMENT
For best detection performance the radar
must be setup correctly. Failure to do so can
result in inaccurate or false detections.
System Integration
The AGD317-105 has been designed to be
used in conjunction with the AGD340 and
a host system. It is the responsibility of the
supplier of the host system to ensure that
data fusion \ correlation of the speed and
range data from the AGD317-105 and speed
data from the AGD340 is done in such a
manner as to be ‘fit for purpose’.
Radar Mounting Angle
Radars are supplied factory programmed
to be used for a specific mounting angle,
usually to 22 degrees. This angle is the
angle the radar points across the road from
the direction of the road (see diagram). The
command *ANGLE may be used to query or
set the angle. This angle is used by the radar
to adjust the speed the radar measures to
the actual target speed and therefore it is
important the radar is setup with the correct
angle. If the radar is setup with an angle that
is less than the mounting angle then the
radar will measure speeds that are larger
than the vehicles true speed, while if the
angle is greater than the mounting angle the
radar will measure speeds that are less than
the vehicles true speed.
The radar transmits a radio beam across
the road that has a horizontal beam width of
~
7 degrees. The vertical beam width of the
radar beam is relatively large at 28degrees
so although the radar should be made level
this is not crucial for correct operation. For
a fixed camera installation often the radar is
mounted relatively high (
~
3m) and in this case it is desirable to point the radar more down towards the ground.
In this application careful consideration of the radar beam and its shape is required to ensure that all the lanes
of the road are covered.
Mounting Height
The radar should be mounted at a height of between 1 and 3 metres. Mounting at a height >3 metres is not
precluded dependant on the minimum offset adopted.
Typical 65m
70m
5m 3.5m 3.5m 3.5m
26m
3.5m 3.5m
22º
7º
3.5m
317 Beam Analysis
Mounting Height: 4m
Mounting Angle: 7.5˚
below horizontal
Targets: vehicle reflection
assumed from a height of 1m