buy chipless rfid tags or something similar?

[JJoll]

Hi, I am devising a system to sort out 4 types of different material into 4 different bins in an automatic fashion. For this I was thinking of using some sort of cheap tag on each item that can be read to see whether it is type 1,2,3, or 4. what kind of tagging system can I use for this? any recommendations?
- A 2 or 3 bit tag would be enough. - cost is very important

I though of chipless RFID tags but I could not find place where I can buy them. They are cheaper than ordinary rfid tags, and have enough capacity for my work. They are radio wireless based therefore making automation easy. I would appreciate it Do you know where can I purchase couple of chipless rfid tags? or you have any other alternative.

thanks

 

[Colin Mitchell]

Chipless tags work on different frequencies from different manufacturers. These are the tags put into books etc. Get them from book shops etc.

 

[Gryd3]

Hi, I am devising a system to sort out 4 types of different material into 4 different bins in an automatic fashion. For this I was thinking
of using some sort of cheap tag on each item that can be read to see whether it is type 1,2,3, or 4.
what kind of tagging system can I use for this? any recommendations?
- A 2 or 3 bit tag would be enough.
- cost is very important

I though of chipless RFID tags but I could not find place where I can buy them. They are cheaper than ordinary
rfid tags, and have enough capacity for my work. They are radio wireless based therefore making automation easy.
I would appreciate it Do you know where can I purchase couple of chipless rfid tags? or you have any other alternative.

thanks

You can get RFID card, stickers, pins, etc...
There are some logistical concerns you need to work out though...

Buying tags will usually result in a set of tags with random ID numbers. So you will need to either 'write' to the tag to set the bits accordingly (1, 2, 3, or 4) or you will need to scan each id into the system and have the system look up the ID to determine 1, 2, 3, or 4.
Additionally... will multiple tags be read at once? Or will you only be reading one at a time?

(You may be able to order rfid tags that are pre-written with specific IDs... this would simplify things greatly)

 

[Martaine2005]

Hi jjoll, I thought I recognized your name!
Cudos to you for sticking with a project.
I know nothing about RFID tags except the alarm sounds when I FORGET to pay!!
Also a tag is necessary for every single item.

I am only responding out of curiosity. The induction loop (metal detector) didn't quite cut it.
Paper, cardboard, plastic etc.
Can you give us an update on what other ideas you had before the tags?
Also, you have narrowed it down to four different materials. What materials did you choose and why?

Martin

 

[Gryd3]

Hi jjoll, I thought I recognized your name!
Cudos to you for sticking with a project.
I know nothing about RFID tags except the alarm sounds when I FORGET to pay!!
Also a tag is necessary for every single item.

I am only responding out of curiosity. The induction loop (metal detector) didn't quite cut it.
Paper, cardboard, plastic etc.
Can you give us an update on what other ideas you had before the tags?
Also, you have narrowed it down to four different materials. What materials did you choose and why?

Martin

Ahh.. from the material identifying thread..
If all your after is sorting and item tracking, you can also use colored stickers and an optical sensor.. or barcode stickers and a scanner.
If you want to get fancy, you could use a webcam and OpenCV.
OpenCV is an image recognition suite that you can use to identify specific characteristics from an image. (Such as shape, color, perhaps a smiley face sticker... You get the idea)

 

[Martaine2005]

Ahh.. from the material identifying thread.

Yes, I thought it was a really good thread to 'watch' but died off.
Martin