Installation Instructions

Title: Installation Specifications and User Manual, Radar
Sensor, 24 GHz
Doc. No. E E814702
INSTALLATION SPECIFICATION Rev. 000, Page 10 of 16
5.0 SPECIFICATIONS
5.3 Installation Specifications For Individual Sensors (cont’d)
5.3.6 Protection from Mud and Dirt Buildup
There will be performance degradation if excessive buildup occurs on the
antenna areas and especially for wet mud. Therefore Autoliv strongly
recommends the sensor mounting include provisions to protect the antenna face
from dirt and mud accumulation. The mounting concept should completely
protect the face of the antenna to prevent mud and dirt from entering the free
space between the sensor radome and the fascia, yet a small weep hole at the
bottom of the bracket is required to allow condensation to dissipate.
5.3.7 Sensor Mounting Thermal Considerations
The sensor is specified to operate in a –40
°
to +85°C ambient, still air
environment. Natural convection and venting from the front and
backside surfaces of the sensor to the ambient air is assumed.
Therefore the mounting concept shall leave both the front radome and
backside area of the sensor exposed to the ambient air. Minimum area
to be left for the backside exposed is as shown below. Bracket
reinforced structure such as cross bars are allowed if approximately
80% of backside area remains exposed to ambient air for heat
dissipation. Maximum surface temperature in this region is +115°C at a
maximum ambient of +85°C.
Figure 7