Advanced Driving Assistance Systems (ADAS)
Drowsiness and microsleep alerts will only occur
after a couple of minutes of driving and above a
certain vehicle speed.
Alerting the driver
Driver Drowsiness
Detection (DDD)
The driver is alerted by a message,
illuminates and an audible signal is given.
After three first level alerts, the system triggers
a new alert with a message, accompanied by a
Reinitialisation
Depending on version the system uses different
cameras to monitor the driver's level of vigilance:
Depending on version, the driver drowsiness
and distraction detection is reinitialised in the
following situations:
more pronounced audible signal and
.
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a front view camera outside the vehicle at the
top of the windscreen
Driver Drowsiness
Detection with Driver
Monitoring Camera
The system monitors the driver's level of
vigilance at speeds above 20 km/h.
The system monitors and analyses visual signs
of drowsiness or distraction of the driver by
monitoring facial, head and eye movements.
The system does not record any video nor is it
capable of identifying the driver.
-
-
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the ignition has been switched off for a few
minutes
a driver monitoring camera inside the vehicle
on the driver side next to the windscreen
facing the driver
the speed remains below 65 km/h for a few
minutes
the driver's seat belt has been unfastened
and the driver's door has been opened
Warning
To avoid risk of eye damage: Do not sit
closer than 25 cm to the steering wheel.
-
-
the driver has changed
the system is reselected
Driver Drowsiness
Detection with Front View
Camera
The system monitors the driver's level of
vigilance at speeds above 65 km/h.
The system may perform a learning procedure
for up to 30 minutes after the start of the
monitoring. During this period, the driver's
individual driving behaviour is analysed and no
alert is given. The camera detects variations in
trajectory compared to the lane markings.
If the trajectory of the vehicle suggests a certain
level of drowsiness or inattention by the driver,
an alert is triggered.
In certain driving conditions such as poor road
surface or strong winds etc., the system may
give alerts independent of the driver's level of
vigilance.
System limitations
In the following situations, the system with front
camera may not operate properly or even not
operate at all:
The visual signs of drowsiness or distraction
may be the following:
-
driver diverts his gaze longer or more
frequently away from traffic
-
poor visibility caused by inadequate lighting
of the roadway, falling snow, heavy rain,
dense fog etc. dazzle caused by headlamps
of oncoming vehicles, low sun, reflections
on damp roads, leaving a tunnel, alternating
shade and light etc.
-
-
eyelids closing or blinking
microsleep patterns
If the system detects certain facial movements,
e.g. a complete closure of the eyes for a certain
time, or analyses a certain level of drowsiness or
distraction, an alert is triggered.
-
no lane markings detected or multiple lane
markings due to roadworks
Alerting the driver
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-
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close vehicles ahead
The driver is alerted by a message and
winding roads or narrow roads
advanced lane keeping assist is active
an audible signal is given. Additionally
illuminates.
If a severe distraction or drowsiness is detected,
e.g. microsleep, sleep events, the driver is
alerted immediately by a message accompanied
front view camera covered by snow, ice,
slush, mud, dirt, or affected by windscreen
damage or foreign items, e.g. stickers
by
and a more pronounced audible signal.
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