Driver Blinking detection system HELP!!

[thesfxstudios]

Dear all tech people
i am trying to build a driver blinking detection system with the aid of infrared. i have come up with a idea of a block diagram for this and my circuit has no software involved. the infrared emitter emits low light infrared towards the eye and the detector detects the length of the blink before the driver goes into micro sleep. so if the person blink is longer than 2.1 seconds the alarm should go off. i am having difficulty with the actual circuit design and how to gain values as i am not an electronic or electrical engineering student but if any of you guys can help me with this i would be very very grateful. i have attached the block diagram. please correct me if im wrong and hope it helps!
thank you

Sam

 

[NickD]

Give you an idea which my help without software, but how to reflect the ir youll have think abaut that one.......555 ic pulsing ir evey 2 secs, ir photo transistor, resetting a 4017 counter, every time it receives 2 sec ir.......if 4017ic does not receive ir to reset in error margin of say 4sec, the 4017 will continue to count and go into alarm....

Paint your eyeballs silver and your eyelids black and it can't fail

 

[DPG]

You love that 4017 IC Tazz . Good IC though I agree. He's never going to get a reliable IR receiver to eyeball connection though. Daz

 

[NickD]

Paint your eyeballs silver and your eyelids black and it can't fail

Actually it can because if I blink every 2s in sync with when the IR is being pulsed, it'll go into alarm. Mr Shannon says "Fail".

 

[tazz]

As I said......thats the part which is down to him....lol