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Infrared burglary fence

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purdue umaru

New Member
Hi,
I am writing a post graduate project on the topic, 'Infrared Burglary Fence
with Intrusion Location'. I need assistance/contributions on how to go about it. The transmitter should be active infrared. The system must be able to detect the location where the intruder came in.

I also need circuit diagrams.

Thank you.
Purdue U.
 

kinjalgp

Active Member
In what form do you need loaction? ie. in x,y co-ordinates or just the direction? Instead of IR beam use LASER for better directivity and less complexity.
 

kinjalgp

Active Member
What is the permieter of your compound and what type of IR source are you going to use? is it IR LED?
 

john1

Active Member
Hi purdue umaru,

If you put Infra Red beams each covering sections,
then an interruption could alert you to a section,
the more sections wanted, the more beams.

Depends how precise you need to locate ...

Best of luck with it, John :)
 

purdue umaru

New Member
The area I want the system to cover is 400 sq Meters for a start and intend using IR LED as the IR source.


Regards,
Purdue.
 

kinjalgp

Active Member
I don't think it is possible to detect 4 directions with one sensor. What is the problem in using 4 sensors? You mentioned your distance is 400 meters. So which LED are you going to use which can focus its radiation upto 400m. Even if you use bunch of LEDs I don't think it will be sensed by any photodiode without high gain amplifier. IR LASER will be a better alternative. You can easily use it upto 1km.
Lets see if any expert comes up with a idea. :idea:
 
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