Preventing falling asleep while driving
Stylish-Engineer
Posts: 13
is there any sensore for eye detection ? , i want to count the number eye closing ant openning , so is it avaible or not ?
Comments
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Don't worry. Be happy
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- Stephen
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Don't worry. Be happy
I once rolled a car over on the M25 motorway - I fell asleep when I was doing about 80 MPH. My brother once fell asleep on his motorbike. Perhaps it runs in the family.
I actually investigated this area quite thoroughly when I was working on advanced cockpit research at BAe, for detecting G-LOC in fast jet pilots. I came to the conclusion that SQUID technology measuring brain activity would be ideal, if the unit could be made small enough.
Leon
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Amateur radio callsign: G1HSM
Suzuki SV1000S motorcycle
Post Edited (Leon) : 8/24/2009 12:00:29 PM GMT
If so, I'd think you could take (off the parallax shelf) a 2-axis accelerometer ?
Unlikely. Acceleromters do very poorly at measuring tilt in accelerating bodies.
If you used two accelerometers, one mounted on the persons shoulder for example, and another mounted on the persons head, you could mathematically cancel out any acceleration/deceleration effects of the car and just sense the persons head motion relative to their shoulder.
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
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· -- Carl, nn5i@arrl.net
Duffer
But a captive pendulum (or other accelerometer, for that's what a captive pendulum is) would cheerfuly inform you that you had just crashed.· That might be useful if you hadn't noticed.
Maybe the real message is "don't drive if you're that sleepy".· I nodded off in a Volkswagen once, years ago, and wandered onto a gravelly shoulder, which fortunately got very noisy.· After regaining control I pulled over for a nap.
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· -- Carl, nn5i@arrl.net
If the head slowly droops then the accelerometer would pick that up, if the head drops quickly, the accelerometer would also pick that up.
Very early one morning when I was 15 I drove my grandparents to a wildlife refuge in Missouri from Lincoln, NE. On the way back, still morning, they had both fallen asleep. Somewhere in Southeast Nebraska I too fell asleep at the wheel of their red Volare wagon and drifted off the two lane highway onto the gravel shoulder. The noise woke me up just as we were approaching a small narrow bridge. I was able to swerve back onto the road and over the bridge without them awaking. After that I was wide awake all the way home. I remember them commenting to my parents on what a great driver I was because they were both comfortable enough with my driving to fall asleep. I kept quiet about nearly killing us all.
Hundreds of thousands of miles and a quarter century later and I have never dozed off since.
Rich H
What you want to sense is attitude, not· acceleration.· But actually I think the original idea of sensing closed eyelids would be much superior.· Abut 750 ms would be enough to keep the thing from going off when you merely blink.· But would 750 ms be fast enough to keep you alive?
Naah.· The thing to do is not drive when you might nod off.
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· -- Carl, nn5i@arrl.net
You could probably account for most of that with programming. Having it go off when messing with your phone or other such distraction might not be such a bad idea.
I agree. It is certainly possible to drift off without nodding your head.
That does make the most sense.
The other thing is, if you have a device to rely upon to keep you awake then you are more likely to use such device when you really shouldn't - putting yourself and others (including myself and my family) at greater risk.
Rich H
that seams to keep people awake!!!
Sorry could not resist
Post Edited (Larry~) : 8/26/2009 3:42:23 PM GMT
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Chris Savage
Parallax Engineering
The simpler one http://www.comforthouse.com/dozal.html is strictly based on head tilt (from the ones I've seen, the logic is at least somewhat based on acceleration of head tilt to prevent false alerts but could also have problems with the idea of what happens if your head goes sideways instead of forward ?)
Then there are some other, much more elaborate systems - simple Google for driver sleep alarm or for driver sleep alert seems to bring up some including
http://www.theautochannel.com/news/2005/11/30/151705.html
http://www.seeingmachines.com/product/DSS/?_kk=driver sleep&_kt=8c093295-0351-4ce1-bde4-a0252e3914cf&gclid=CPTN_KOnwpwCFSUMDQodPXK9nA
But I can see even the more advanced as not alerting until you are only a hair's breath from imminent danger. Of course, my state just had to put a law on the books forbidding young drivers from texting while driving. (But us old folks are still legal to text).
@Leon: re you're brother falling asleep on a bike - did he loose his balance enough to dump the bike? yikes!
- H
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1. As others have mentioned, how would it know that you are dozing off, or cheching the radio station or speedo? Would flase positives be acceptable?
2. I have ALMOST fallen asleep at the wheel and my stepmother actually did. (Maybe it does run in the family!, Oh step, hummmm shouldn't be heraditary then).
When she fell asleep the passenger in her van said she was looking STRAIGHT ahead with her eyes open! This is called road hyptnosis. She was staring straight ahead and not responding. When the passinger (my grandmother) woke her, she had already drifted onto the shoulder and was about to hit a roadsign. She cut the wheel hard back onto the highway and rolled the van 3 or 4 times.
I think it's possible to fall asleep without dropping your head.
Mate, that will keep you awake
cheers,
Chris
West Oz.
Lucky if i get out of 2nd gear.