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room person counter help

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resonableman

New Member
im doing a project to count the number of persons entering orleaving such that the counter must display people inside the room.also the sensor must detect whether the person is entering or leaving and it should not interpret hand movement as person entering the room.

PLZ HELP ME ABOUT WHICH SENSON AND CONFIGURATION I MUST USE
 

zipdogso

New Member
You may use a photoelectric cell to do this...Or if the room has a door, then a person entering or leaving may be recognised by the direction of moving the door...
This assumes the door opens both ways...Then the problem is that if the door opens both ways some people will push to open and others will pull to open so I don't think this will quite work the count won't be accurate.
The solution would be two doors only opening in one direction but apart from the kitchen staff doors in a restaurant how many other situations have such a setup.
 

Boncuk

New Member
Use two IR-barriers at a reasonable distance (1ft) to determine direction. Connect an up-down counter and you're done.

Waving hands shouldn't be a problem as long as nobody tries to win a race entering or leaving the room. :)

Boncuk
 
Use two IR-barriers at a reasonable distance (1ft) to determine direction. Connect an up-down counter and you're done.

Waving hands shouldn't be a problem as long as nobody tries to win a race entering or leaving the room. :)

Boncuk
how can a person pass through a 1 ft door Need real help plz
 

giftiger_wunsch

New Member
Only way to make the count accurate.
I wouldn't say the only way. If you use 3 pairs of these sensors evenly distributed across the height of the doorway, that completely eliminates the chance of a hand movement tricking the system. Unless the OP is expecting people to try to deliberately deceive the system (for example by two people entering at once), turnstiles should not be necessary.
 

giftiger_wunsch

New Member
I believe he's aware of that; he's suggesting that you could install turnstiles.

Brownout, the other problem is that turnstiles do not usually work in both directions, and difficulties especially occur when there's only room for a single turnstile for both directions.
 

resonableman

New Member
i think i will use 2 set of 3 sensors spaced some ditance apart to detect incoming or outgoing person movement..

whih sensor do u suggest i should use??
thx everyone
 

BrownOut

Banned
Why sould two people entering the room at once be a deliberate attempt to fool the system? People move in ways that are most condusive to their own needs. The possibility of multiple people entering/leaving the room is always there. There is no system that can reliably account for that. Secure buildings require each person entering or leaving to use a magnetic badge before passing through. But even that isn't 100% reliable, as one person can 'taligate' on another. Only by controlling how people pass through can you be sure you have an accurate accounting.
 
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