Highway Safety Group EA401 Manuel de l'utilisateur - Page 3

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II. Alarm theory

A driver may not be aware that they are in danger due to fatigue. A

driver might feel they must continue driving. Our driver fatigue alarm

system reminds the driver that he/she is in a dangerous state. The

EA401 uses a PERCLOS algorithm to analyze the driver's fatigue level.

The state of the driver's eyes is constantly analyzed. The human retina

reflects infra-red light in a manner that can be used to determine the

eye's condition. This varies just prior to falling asleep. The EA401

knows you are falling asleep before you close your eyes.

If the EA401 determines the driver is in a dangerous state a sharp

voice will alert the driver.

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