RFID For Dummies by Sweeney Patrick J

Author:Sweeney, Patrick J.
Language: eng
Format: epub
Publisher: John Wiley & Sons, Inc.

Choosing a Hand-held, Mobile, or Fixed-location Reader

You can choose from three types of readers for your RFID network: hand-held, mobile, or fixed-location. Many criteria enter into this decision, including operating processes, system cost, read range, read rate, volume to be covered, and allowable physical locations of antennas. The operating process, required read data, and cost of installation will strongly influence the type of reader installation that you choose.

Hand-held: Hand-held readers are acceptable if only one or two tags per read location need to be read at a time or if the volume is prohibitively large for fixed location readers. Using hand-held readers is similar to using a bar code reader, but unlike bar code readers, hand-held RFID readers don’t require the tag to be clearly visible. Unfortunately, no hand-held readers with a high power output and long battery life are currently available. The advantage of a hand-held is that you can clearly scan one case or pallet at a time without interference from pallets close by.

Mobile: A mobile reader located on a trolley or powered cart can be moved throughout a facility to read all the facility’s contents economically. Hand-helds can augment this process for hard-to-read objects. The benefit of a mobile solution, such as the ACCU-SORT mobile tagging station, is that the printer, reader, and a bar code scanner can all be in an easily movable solution that communicates over 802.11 back to the main database. This one also has a middleware component incorporated and can help companies get compliant quickly with an investment of less than $100,000 in most instances, after proper physics testing and verification.

Fixed location: Fixed-location readers may be located at all entry and exit points in a facility, on conveyors, at sort stations, or anywhere there is a choke point (a point where items must pass by). The benefit of a fixed RFID reader is its ability to automatically count and capture data without needing human involvement. I have set up fixed location readers that have achieved better than 98 percent success rate of reading items as they pass by on a conveyor. This type of automation and accuracy is what makes RFID the cat’s meow.

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