Component Description For Multifunction Camera - GF54.21-P-3300FQ
MODEL 218
as of year 2015
with CODE 22P (Lane tracking package)
with CODE 23P (Driving Assistance package)
with CODE 513 (Speed Limit Assist)
with CODE 628 (Adaptive High beam Assist Plus)
up to year 2015
with CODE 238 (Active lane keeping Assist)
with CODE 476 (Lane keeping assist)
with CODE 513 (Speed Limit Assist)
with CODE 608 (Adaptive High beam Assist)
Multifunction camera (A40/11) (up to 31.08.2014 with code 238 (Active Lane Keeping Assist) or code 476 (Lane Keeping Assist) or code 513 (Speed Limit Assist) or code 608 (Adaptive High beam Assist)), shown on model 218.3
Multifunction camera (A40/11) (as of 01.09.2014 with code 476 (Lane Keeping Assist), code 513 (Traffic Sign Assist) or code 608 (Adaptive High beam Assist), or code 628 (Adaptive High beam Assist Plus) and without code 23P (Driving Assistance Package))
Stereo multifunction camera (A40/13) (as of 01.09.2014 with code 608 (Adaptive High beam Assist) or code 628 (Adaptive High beam Assist Plus), or code 513 (Traffic Sign Assist) and code 23P (Driving Assistance Package))
Location
The multifunction camera is located at the top on the windshield behind a cover.
Task
Multifunction camera:
The mono multifunction camera records information on the surroundings in the area to the front of the vehicle, e.g. ambient brightness, objects or traffic signs. These are evaluated by the integrated control unit, and used for implementing various functions.
Stereo multifunction camera:
The stereo multifunction camera consists of two high-resolution mono cameras, that are mounted at a distance apart of approx. 20 centimeters in a housing. While one mono camera only estimates the distances to objects, the stereo multifunction camera can measure the distance to an object and its height above the road. 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. On an average distance of s = 20 to 30 m the stereo multifunction camera can determine the distance to the object accurately to within s = 20 to 30 cm. This high resolution is also available under more difficult conditions such as when multiple objects are situated very close to each other, when objects are partially concealed or when there is a low contrast between the object and the background. The electronic analysis system of the stereo multifunction camera is also able to differentiate between shadow and road markings and real objects. As well as the spatial position of a detected object, the stereo multifunction camera also supplies additional critical information: A direction of motion along the horizontal, vertical and longitudinal axis can be determined for each pixel of a detected object. This then clearly shows 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.
This results in the following tasks:
- Reading in of signals
- Evaluation of input factors
- Controlling functions
- Actuation of components
- Transmission of signals and requests
Reading in of signals
The input factors are read in over the following connections:
- Chassis CAN (CAN E) (up to 28.02.2013) or chassis CAN 2 (CAN E2) (as of 01.03.2013) (Multifunction camera)
- Chassis FlexRay (Flex E) (Stereo multifunction camera)
Chassis CAN (up to 28.02.2013) or chassis CAN 2 (as of 01.03.2013) (Multifunction camera)
The multifunction camera also reads in the following signals:
- Terminal 15 status
- Engine running or drive train operational
- Wheel speed
- Vehicle speed
- Vehicle lateral and longitudinal acceleration
- Vehicle level (with code 608 (Adaptive High beam Assist) or code 628 (Adaptive High beam Assist Plus))
- Information indicative of driver activity, such as turn signaling, accelerating, braking, steering
- Information indicating possible distraction of the driver, such as operation of the audio system, different comfort functions (interior illumination, steering column adjustment) and different menu levels in the instrument cluster (A1)
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
Chassis FlexRay (Stereo multifunction camera)
The stereo multifunction camera reads in the following signals, amongst others:
- Terminal 15 status
- Engine running or drive train operational
- Wheel speed
- Vehicle speed
- Vehicle lateral and longitudinal acceleration
- Vehicle level (with code 608 (Adaptive High beam Assist) or code 628 (Adaptive High beam Assist Plus))
- Accelerator pedal position
- Information on Intelligent Light System activity
- Information on brake control system activities
- Information indicative of driver activity, such as turn signaling, accelerating, braking, steering
- Information indicating possible distraction of the driver, such as operation of the audio system, different comfort functions (interior illumination, steering column adjustment) and different menu levels in the instrument cluster
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
Evaluation of input factors
The input factors are evaluated by the microprocessor and the corresponding components are actuated.
Controlling functions
The multifunction camera controls the following functions:
- Lane Keeping Assist (with CODE 476 (Lane Keeping Assist))
- Speed Limit Assist (with code 513 (Speed Limit Assist)) (up to 31.08.2014)
- Traffic Sign Assist (with code 513 (Traffic Sign Assist)) (as of 01.09.2014)
- High beam Assist (with code 608 (Adaptive High beam Assist))
The stereo multifunction camera controls the following functions:
- Speed Limit Assist (with code 513 (Speed Limit Assist)) (up to 31.08.2014)
- Traffic Sign Assist (with code 513 (Traffic Sign Assist)) (as of 01.09.2014)
- High beam Assist (with code 608 (Adaptive High beam Assist))
- Active Lane Keeping Assist (with CODE 238 (Active Lane Keeping Assist))
Actuation of components
To avoid any fogging in the multifunction camera's field of view the front window is heated in this area by the auxiliary heater heating element (R50). The auxiliary heater heating element is directly actuated by the multifunction camera.
Transmission of signals and requests
The multifunction camera sends status information and requirements over the following connections:
- Chassis CAN (up to 28.02.2013) or chassis CAN 2 (as of 01.03.2013) (Multifunction camera)
- Chassis FlexRay (Stereo multifunction camera)
Chassis CAN (up to 28.02.2013) or chassis CAN 2 (as of 01.03.2013) (Multifunction camera)
The multifunction camera transmits the following signals and requests, among other things:
- Steering wheel vibration motor (M99)
- Ambient brightness
- Conduct optical headlamp range adjustment
- Actuate adaptive high beams
- Display traffic signs
- Lane data
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
Chassis FlexRay (Stereo multifunction camera)
The stereo multifunction camera also sends the following signals and requests:
- Steering wheel vibration motor
- Ambient brightness
- Conduct optical headlamp range adjustment
- Actuate adaptive high beams
- Display traffic signs
- Lane data
- Fast and precise object recognition (object size, type of object, object direction of motion, distance)
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
Structure
The multifunction camera consists of the following main components:
- Camera head (multifunction camera)
- Left and right camera head (stereo multifunction camera)
- Electronic analysis system (control unit)
- Auxiliary heater heating element
The multifunction camera must be recalibrated after replacing the multifunction camera or windshield.
Variants
Multifunction camera as of 01.09.2014:
- Multifunction camera with horizontal detection angle of ∠ = 34° (with code 608 (Adaptive High beam Assist) or code 628 (Adaptive High beam Assist Plus) without code 513 (Traffic Sign Assist))
- Multifunction camera with horizontal detection angle of ∠ = 46° (with code 513 (Traffic Sign Assist) or code 608 (Adaptive High beam Assist), or code 628 (Adaptive High beam Assist Plus))
| Wiring diagram for multifunction camera | PE54.21-P-2129-97XAA PE54.21-P-2129-97XAB |