Component description for multifunction camera - GF54.21-P-3300FL
MODEL 212 as of model year 2014 with CODE 23P (Driving Assistance package Plus)
MODEL 212 as of model year 2014 with CODE 513 (Road sign recognition system)
MODEL 212 as of model year 2014 with CODE 628 (Adaptive Highbeam Assist Plus)
MODEL 212 up to model year 2014 with CODE 238 (Active lane keeping Assist)
MODEL 212 up to model year 2014 with CODE 513 (Speed Limit Assist)
MODEL 212 up to model year 2014 with CODE 608 (Adaptive Highbeam Assist)
MODEL 212 with CODE 476 (Lane keeping assist)
Multifunction camera (A40/11) (up to 28.02.2013 with CODE 238 (Active Lane Keeping Assist) or CODE 476 (Lane Keeping Assist) or CODE 513 (Speed Limit Assist) or CODE 608 (Adaptive Highbeam Assist))
Multifunction camera (A40/11) (as of 01.03.2013 with CODE 476 (Lane Keeping Assist) or CODE 513 (Speed Limit Assist) or CODE 513 (Traffic sign recognition) or CODE 628 (AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+)) and without CODE 23P (Driving Assistance package))
Stereo multifunction camera (A40/13) (as of 01.03.2013 with CODE 628 (AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+)) or CODE 513 (Speed Limit Assist) or CODE 513 (Traffic sign recognition) 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 multifunction camera records information regarding the area in front of the vehicle such as, 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. At an average distance of 20 to 30 meters the stereo multifunction camera can determine the exact distance to the object down to 20 to 30 centimeters. This high resolution is also available under arduous conditions. When, for example, several objects are located close to each other, when objects are partially overlapped or when 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. 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
- Output of signals
After replacement of a multifunction camera or the windshield the multifunction camera has to be recalibrated.
Reading in of signals
The input factors are read in via the following connection:
- 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 (CAN E) (up to 28.02.2013) or chassis CAN 2 (CAN E2) (as of 01.03.2013) (Multifunction camera)
The multifunction camera reads in, e.g. the following signals:
- Circuit 15 status
- Engine running or drive train operational
- Wheel speed
- Vehicle speed
- Vehicle lateral and longitudinal acceleration
- Vehicle level (with CODE 628 (AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+)))
- 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)
Chassis FlexRay (Flex E) (Stereo multifunction camera)
The stereo multifunction camera reads in the following signals, for instance:
- Circuit 15 status
- Engine running or drive train operational
- Wheel speed
- Vehicle speed
- Vehicle lateral and longitudinal acceleration
- Vehicle level (with CODE 628 (AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+)))
- Accelerator pedal position
- Information on Intelligent Light System activities
- 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))
- High Beams Assist (with CODE 608 (Adaptive Highbeam Assist) or as of 01.03.2013 with CODE 628 (AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+)))
The stereo multifunction camera controls the following functions:
- Speed Limit Assist (with CODE 513 (Speed Limit Assist))
- High Beams Assist (with CODE 608 (Adaptive Highbeam Assist) or CODE 628 (AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+)))
- Active driver assistance systems:
- Active Lane Keeping Assist (with CODE 238 (Active Lane Keeping Assist)) BAS PLUS (with CODE 268 (Brake Assist PLUS) and CODE
- 269 (Brake Assist PLUS, cross-traffic (BAS+Q)))
- PRE-SAFE® brake (with CODE 300 (Collision reduction (CMS)))
- DISTRONIC PLUS Steer Assist (with CODE 266 (Steer 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.
Output of signals
The multifunction camera sends status information and requirements over the following connection:
- 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
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 sends the following signals and requests, for instance:
- 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).
Variants
Multifunction camera as of 01.03.2013:
- Multifunction camera with horizontal detection angle of ∠ = 34° (with CODE 628 (AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+)) without CODE 513 (Speed Limit Assist))
- Multifunction camera with horizontal detection angle of ∠ = 64° (with CODE 513 (Speed Limit Assist) or CODE 628 (AUTOMATIC HIGH BEAM CONTROL PLUS (IHC+)))
| Wiring diagram for multifunction camera | PE54.21-P-2129-97DAA |