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Sleep sensor

by taylaron
Tags: sensor, sleep
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Apr10-12, 06:11 PM
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Hi PF, I need some help. I'm studying to be an electrical engineer and i'm trying to make a cheap, non-invasive device that can detect when a person is starting to fall asleep. The device should be able to work on any person and perform a task before they can fall asleep.

*Can anyone tell me what happens physiologically when a person starts to loose consciousness?

As a bonus, it would be extra helpful if you know a way to easily and cheaply detect it.

What I know:
rapid eye movment- unusable beacuse the person is too far into sleep
slowing heart rate- differs from person to person and is dependent on prior physical activity. unreliable?
brain waves change- too invasive to detect and costly.
Any more?

Much thanks,
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Apr16-12, 10:45 AM
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Bueller? ..... Bueller?..... Bueller? .....

Does anyone have a thought on detecting the first and second stage of NREM sleep?

Much thanks,

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