Front Multifunction Camera, Basic Function - GF54.71-P-9890A
Model all (CAR)
Location
The mono multifunction camera is located at the top center of the windshield behind a trim.
Location
The stereo multifunction camera is located at the top center of the windshield behind a trim.
Task
Mono multifunction camera (vehicle equipment without Driving Assistance Package)
The mono multifunction camera records the area in front of the vehicle (e.g. brightness, objects or traffic signs). These are evaluated by the integrated electronic analysis system and then used for implementing various functions.
The mono multifunction camera controls the following functions:
- Track guidance (vehicles with Active Lane Keeping Assist)
- Traffic area monitoring (Vehicles for countries with Euro NCAP)
- Traffic sign recognition (vehicles with Speed Limit Assist or with Traffic Sign Assist)
- Automatic high beam (vehicles with Adaptive Highbeam Assist)
A differentiation is made between the following mono multifunction camera variants:
- Entry (vehicles with Adaptive Highbeam Assist)
- High (vehicles with Active Lane Keeping Assist, with Traffic Sign Assist)
- EVO (vehicles for countries with Euro NCAP)
The Entry or High mono multifunction camera is connected to the network architecture of the vehicle via CAN. The EVO mono multifunction camera is connected to the network architecture of the vehicle via FlexRay.
Stereo multifunction camera (vehicle equipment with Driving Assistance Package)
The stereo multifunction camera consists of two high resolution camera heads that are mounted at a distance of approx. 20 cm apart in a housing. The stereo multifunction camera can record the distance to an object and its height above the roadway. This is made possible by the differences in perspective between the left and the right optical path.
The electronic evaluation circuit in the stereo multifunction camera uses the same effect that enables people to have stereoscopic vision, this refers to the parallax or displacement between two images. At an average distance of 20 to 30 m, the stereo multifunction camera can determine the exact distance to the object down to 20 to 30 cm. This high resolution is also available under arduous conditions.
- If, for example, several objects are situated very close to each other.
- When objects are partially concealed.
- If the contrast between object and the background is low.
The electronic analysis system of the stereo multifunction camera is also able to differentiate between shadow and road markings and real objects. Along with the spatial position of a detected object, the stereo multifunction camera also provides decisive additional information: For each pixel of a detected object, a direction of motion can be determined on the horizontal, vertical and longitudinal axes (longitudinal axis of an object). This then clearly recognizes whether an object is moving and if so, where to. In combination with object classification (e.g. pedestrian) based on common features, it is possible to achieve a high degree of decision-making reliability. For example, the exact impact location for a collision can be calculated which in turn enables the time remaining until the point of impact to be used to maximum effect for safety precautions. The stereo multifunction camera supports this process over the entire vehicle speed range.
The stereo multifunction camera is connected to the network architecture of the vehicle via FlexRay.
The stereo multifunction camera controls the following functions:
- Traffic sign recognition (vehicles with Traffic Sign Assist)
- Automatic high beam (vehicles with Adaptive Highbeam Assist)
- Active driver assistance systems:
- Active track guidance
- Traffic area monitoring
To implement the functions, each multifunction camera processes, e.g. the following information:
- Operating condition for engine/drivetrain
- Terminal status of terminal 15
- Wheel speed
- Vehicle speed
- Acceleration/yaw rate
- Information indicating driver activity, such as, e.g. turn signaling, accelerating, braking, steering
- Information indicating possible distraction of the driver, such as, e.g.:
- Operation of audio system
- Operation of on-board computer/multimedia system
- Operation of various comfort functions (interior lighting, steering column adjustment)
- Information on brake control system activities (stereo multifunction camera)
The multifunction camera evaluates these input factors and sends, e.g. the following information and requests:
- Ambient brightness
- Lane data
- Object data (object size, object type, object direction of motion, distance) (stereo multifunction camera)
- Requests:
- Actuate electric power steering actuator motor (vehicles with Lane Keeping Assist)
- Automatic high beam (vehicles with Adaptive Highbeam Assist)
- Display traffic signs (vehicles with Traffic Sign Assist)
Structure
The multifunction camera consists of the following main components:
- Camera head (mono multifunction camera)
- Left and right camera head (stereo multifunction camera)
- Electronic analysis system (control unit)
- Auxiliary heater heating element
| Component descriptions | |||
| Component description for multifunction camera | Model 223 | GF54.21-P-3300A | |
| Model 243 | GF54.21-P-3300B | ||
| Model 206 | GF54.21-P-3300C | ||
| Model 297 | GF54.21-P-3300D | ||
| Model 295 | GF54.21-P-3300E | ||
| Multifunction camera heating element, component description | Model 223 | GF54.71-P-0014A | |
| Model 206 | GF54.71-P-0014C | ||
| Model 297 | GF54.71-P-0014D | ||
| Model 295 | GF54.71-P-0014E |