User Manual

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© AGD Systems Ltd 2010. All rights reserved., the information contained in this document is the property of AGD Systems Ltd., and is supplied
without liability for errors or omissions. AGD315 User Manual Page 9 of 12
7 RADAR USAGE
7.1 Introduction
For best detection performance the radar must be setup correctly. Failure to do so can result in
inaccurate or false detections.
7.2 System Integration
The AGD315-205/207 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 AGD315-205/207 and speed data from the AGD340 is done in
such a manner as to be ‘fit for purpose’.
7.3 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
Error! Reference source not found.. The angle is also reported in all output messages and the
command *AD may be used to determine it. 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.
22
o
Figure 2 Radar Mounting Angle
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.