RFID Technology Presentation

March 11, 2012 § Leave a comment

RFID Presentation I did for module CT231

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Future of RFID Technology

March 10, 2012 § Leave a comment

Scientists have recently developed a way of embedding a thin aluminium RFID tag onto a piece of paper. It uses less metal than designs at the moment. It could easily reduce the cost of RFID tags by 80%. RFID technology will replace the manual jobs for tracking products in the supply chain. It will automate a lot of the processes as products pass through warehouse and when they reach the shop floor.

The purchase of items in a shop could be automated also. You could have an RFID device in your pocket and simply walk out of the shop with your items and the RFID device would sort the payment out. Smart appliances could be seen in the future. Your fridge could alert you when something is about to go off, or it could create shopping lists automatically when you are running low on something.

References:

Alex Kayle. (2012). Scientists build cheap paper RFID, Retrieved February17 2012,
from http://www.itweb.co.za/index.php?option=com_content&view=article&id=51612:scientists-build-cheap-paper-rfid.

Problems with RFID Technology

March 9, 2012 § Leave a comment

There is a few problems with RFID Technology that have cropped up over the years.

RFID systems can be disrupted easily using energy that is at a particular frequency. This could cause problems when RFID systems are being used in hospitals or in the military.

Tag collision – This can occur when many tags are in the area at once, the reader might not be able to read all of them. An anti-collision protocol was developed which lets the tags talk to the reader, one at a time.

References:

Technovelgy. (n.d.). Problems with RFID, Retrieved February19 2012, from
http://www.technovelgy.com/ct/Technology-Article.asp?ArtNum=20.

What are the different types of RFID tags?

March 9, 2012 § Leave a comment

In this blog post I will investigate RFID tags.

There are three types of RFID tags:active, passive, and battery assisted passive tags. All three types have a central chip and an antenna.

Active tags have their own on board power source. This makes them quite a bit more expensive and bigger than passive tags. The power source helps the tags to be read from much greater distances, from 20 metres to 100 metres.

Active tags can work at much higher frequencies usually 455 MHz, 2.45 GHz, or 5.8 GHz. The tag can always broadcast a signal because of the on-board power source or they can become active when they come in contact with a scanner. Active tags can have a memory as large as 128 kilobytes. Active tags can have other uses, such as data logging and temperature sensing.

RFID Active Tag

CC BY-NC-ND 2.0 thisyearsboy Active Tag

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What is RFID technology?

March 9, 2012 § Leave a comment

RFID Technology has been around for many years now but what exactly is it?

RFID stands for Radio Frequency Identification. It is a form of electronic tagging. A tag is attached to an object then radio waves are used to transfer information to a reader. They are a lot like bar codes except a reader does not have to be in its line of sight to read the tag.

RFID tag

CC BY-NC-ND 2.0 4-6

References

Mark Roberti. (2003). Case Study: Wal-Mart’s race for RFID, Retrieved September 21 2011,
from http://www.bssinsight.com.au/PDF/Casestudy_RFID_Walmart.pdf.

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