Design

Design

Laser safety





Warning! Risk of eye injuries if any of these instructions are not followed.

Note! The laser sensor in the Closing velocity module (CVM) is active in ignition position II.

- Do not disassemble the laser sensor (including removal of the lenses). A disassembled laser sensor fulfills class 3B according to standard IEC 60825-1. Laser class 3B is harmful to eyes and there is therefore a risk of injury.
- To prevent exposure of harmful radiation, do not perform any adjustments or maintenance other than that stated here.
- The laser sensor must be installed on the windscreen before making contacts.
- The laser sensor's contacts must be disconnected before the laser sensor is removed from the windscreen.
- There is a risk of causing eye damage by looking into the opening of the laser sensor (that gives off invisible laser radiation) with magnifying optic devices such as magnifying glass, microscope, objective or similar optical instruments at a distance shorter than 100 mm.
Laser - radiation data:
Maximum average output: 45 mW
Pulse width: 33 ns
Divergence (horizontal x vertical): 28° x 12°

Control module




The Closing velocity module (CVM) is LIDAR-based (Light Detection and Ranging) and uses lasers to detect whether the vehicle is on a collision course with a vehicle ahead.
There is a sensor in the Closing velocity module (CVM) that transmits infrared laser light. The sensor transmits the laser light from three lobes (left, right and center).
If there is a vehicle ahead, the light is reflected and registered by the three photo diodes,
The control module measures the time it takes for the light to go from the sensor, reflect from the vehicle ahead, and back to the photo diodes. The time is used together with the vehicle speed to calculate the distance to the vehicle ahead and also the speed difference between the vehicle and the vehicle ahead.
The sensor is active within approx. 6 meters ahead of the vehicle.
The sensor senses vehicles that are stationary or that are travelling in the same direction as the host vehicle. The sensor also senses oncoming traffic, but the support function City Safety does not react to oncoming traffic.

The Closing velocity module (CVM) has inputs and outputs for:
- power supply
- ground
- CAN-network (Controller Area Network)
- internally in the CAN-net (only XC60)
- sensor-CAN (only S60 (11-) and V60)

External influences on the Closing velocity module (CVM)
In some weather conditions, for example heavy rain, snowfall or fog, the performance of the sensor can become affected. This can mean that the sensor has difficulties in detecting vehicles ahead.
The performance of the sensor does not differentiate between day or night.
In order for the sensor to work optimally, the area on the windscreen in front of the sensor must be free of dirt, rain, ice and snow.
The sensor is positioned within the area of the windscreen wipers.