RFID: Can it help your business?

Summary:In 10 years almost everything will be tagged, say the experts. So what are these little chips that are soon to be so pervasive, and how will they take over your business?



In 10 years almost everything will be tagged, say the experts. So what are these little chips that are soon to be so pervasive, and how will they take over your business?


Contents
Introduction
Starving for standards
Secrets and trials
Chipping the chains
RFID a real asset
Future potential
Executive summary

RFID technology has been around for some 60 years but few people have been aware of it until recently because it is so unobtrusive, Tony Edwards, industry consultant on RFID at Symbol, says. It's mostly been used over short ranges, and the technology has been put to various uses including vehicle tolling, contactless security passes, car immobilisers (with the tag built into the key) and the identification of hospital patients, and cattle.

Radio frequency identification involves a "tag" consisting of a small integrated circuit and an antenna. The tag broadcasts its identity when it passes within range of a reader, allowing its presence to be recorded.

There are two basic types of tag. Active tags require a power source (usually a battery) and are therefore relatively bulky and expensive. The eTag used on tollways is a well-known example. The main benefit is that they have a greater range.

Passive tags do not require a battery. Just as old-fashioned crystal radios worked from the energy of the broadcast signal, the tag is powered by the energy radiated by a reader. The "microchip" used to identify pets is a passive RFID tag.

For commercial or industrial uses, the tags are often mounted on a label, and the chip can be programmed with a unique identity number at the same time as the label is printed. For backwards compatibility, the label can also carry a barcode as well as human-readable information.

Reading a tag is not foolproof. "There are a lot of physical constraints you have to consider," says Trevor Barrows, solutions director at SSA Global Pacific, including the presence of water or metal which reduces range, and the possibility that two tags may be in contact (although Sydney-based Magellan Technology has developed "stack tags" that can still be read even when many tags are in very close proximity).

Topics: Processors, Security

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