IR in range detectors

Post by **Bastiaan** » Sat Mar 28, 2009 11:02 am

From the RFID thread/groupbuy project I ran into the link below:

http://www.acroname.com/robotics/info/a ... sharp.html

I think it deserves a thread of its own because I have been looking for this a long time.

For example in my garden I had a motion sensor, everytime the sun pointed into it, I got a false alarm. The same when the wind was moving the trees too much.

these little devices seem a great addition to the set. In corridors and pathways you mount the sensor at waste height so no pet's can trigger, and you have a nice addition and pretty fail proof to the alarm system/domotica.
Nice to combine them with the visonic wireless switch or with the RFID receiver.

What are your thoughts about it? Anybody experience with it?

Post by **Esteban** » Sat Mar 28, 2009 3:27 pm

No idea why I typed this in Dutch, probably because I came from the buying thread which was in dutch

It's in english now:

No experience with these IR devices but they look interesting. I looked at light gates some time ago. I was thinking of placing one in front of the house. This would warn me when somebody entered the property weither via the driveway or through the hedge. But these only do light beam interruption. It looks like this IR thing also has a range in which it detects. Although the distance of detection is shorter.

Post by **Bwired** » Sat Mar 28, 2009 4:07 pm

You first have to see the quality of the devices (ir), thats very important.
Personally I think adding all kind of things to the product mostly does not benefit the product.
So try one out

Please lets keep this in English

Post by **Bastiaan** » Sat Mar 28, 2009 4:23 pm

The combination RFID + IR range sensor are a nice way to limit the area where you detect a tag. People entering a door for example might automatically open a doorlock but walking the other way might trigger again....
Still puzzling how to use the combination in a good way.

Post by **Alexander** » Sat Mar 28, 2009 5:44 pm

Yes i did see the IR sensors too, but don't know which products it can use. It would be nice if this sensor can be connected to a transmitter instead of a receiver. And only send the ID if the IR sensor get triggered.

Post by **Bastiaan** » Sat Mar 28, 2009 6:26 pm

I think that is the idea. Make a combination from receiving the RFID and IR signal and then switch. But why should that be on the transmitter?

Post by **Esteban** » Sat Mar 28, 2009 7:21 pm

I think mgizmo means if it's on the transmitter it's portable and be installed anywhere, if it's on the receiver you're tethered to the PC.

Post by **Fantic** » Sat Mar 28, 2009 8:13 pm

When you have it on the receiver you can see (IR) if the person is in range and the tag that this person carries around will send it's ID to the receiver.
This will allow you to setup the IR eye to test for proximity to the front door and the rfid tag to identify the personto allow the door to be opened. This does not cover the small issue of you being inside with the tag on you sitting on the loo (often close to the front door), when someone is outside and wants to ring the bell and finds the door opening by itself hmmmm...
Distance that most serial connections can cover is way over 100meters.

Regards, Maarten.
Never let a computer know you're in a hurry.

Post by **Bastiaan** » Sat Mar 28, 2009 8:30 pm

Thats another issue, why no ethernet connections? My HS server is 25 meters from the entrance...
Again back to the Belkin USB extender?

I guess the combination of IR and RFID gives you a bit more control over the distance the set will switch. It looks like most of the IR device will work on the RFID set, except for the biggest one.

Post by **Alexander** » Sun Mar 29, 2009 2:03 am

make it wireless: http://www.ananiahelectronics.com/PCR1A.htm + http://www.ananiahelectronics.com/FS100A.htm

Post by **Digit** » Sun Mar 29, 2009 2:12 am

@zebrafilm:
You are right, my sad conclusion was also that i had to buy another Serial to Ethernet device cause at the location where i want to put the receiver, i don't have neither RS232 nor USB; only a 8-port switch with some ports still available.