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What are the most popular sensors used in lift doors?

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moharaza

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can anyone help me with door sensors?

what are the most popular sensors used in lift doors?
can anyone give parts detail.

all i want to do, is to implement intillegent home system using pic18f452.

apart from this, i would like to know whether i can interface SFR05 with my pic or not.

please please help. i m a beginner.
 

Re: door sensor help

hi,
the simplest door sensor is a couple of magnet and a sensor switch that is closed when the magnet is near to switch and open when it is far...attache the magent to your door and the switch on wall near to door, when the door open the switch is opened...its reliable, no connection between door and any circuit and also cheap.

good luck
 

Re: door sensor help

use magnatic sensors for doors these are used in many professional systems.:idea:
 

door sensor help

you can you an IR transmitter/receiver pair........

when the door opens the circuit breaks and the alarm sounds
 

door sensor help

why not use some light sensors like LED+LDR
or IR LED+photo diode or some 38K IR+TSOP. They are cheaply available and easy to implement compared with other sensors

Bibin John
www.booksbybibin.tk
 

door sensor help

I think the original poster was asking about lift/elevator door. As I know the elevator door has some sensor mechanism to eliminate accident by closing the door when there is an object in between the door.
Perhaps following website could be used as reference:
**broken link removed**
**broken link removed**

The sensor mechanism also found on the subway train door.
 

Re: door sensor help

hi,
i m still in dark with door sensor.
i am working with IR.
Problem is—

-I am not getting the response i want,
-Receiver does not respond to emitter, it works fine with any tv/cd remote.
But not with emitter. I tried and burnt several emitters. :cry:

i used photoelectric IR emitter.

any suggestions??
 

Re: door sensor help

If you use IR TV receiver (like TSOP) then you must modulate the signal transmitted with 38KHz. Read the documentation from following link and the pdf file from receiver circuit.
**broken link removed**

Good luck!

Cristi
 

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