The system uses a sophisticated algorithm, against which the driver’s rate of eye blinking is measured. When the cameras detect a pattern of long duration eye-lid closures, indicating the potential onset of drowsiness, a series of three warnings is initiated.
In the first instance, a chime sounds and a text warning message “Tired?” is displayed in the main instrument panel. If the driver’s eye-lid movement does not immediately revert to a normal ‘wide awake’ pattern, a speech message “You are tired” is then delivered through the car’s audio system. If there is still no response, a stronger warning tone and the message, “You are dangerously tired – stop as soon as it is safe to do so!” will come over the audio. This can only be canceled when the driver presses a reset button in the fascia. The system is then immediately reactivated.
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