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E-mail: informbyuro@yandex.ru
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Anti-theft RFID technologies in trade
What is an RFID system?
The RFID technology under consideration is the interaction of a scanner, a tag, and an information collection server. The scanner "irradiates" the tag, the tag is activated from this and tells the scanner its number. The scanner transmits the collected information to the server, where the information is processed.
An RFID tag basically consists of a small flat antenna and an even smaller chip.
The size of the microcircuit inside the label does not exceed the size of a match head and sometimes even less. The size of the RFID tag itself depends on the type of housing, the frequency range in which the tag operates and the conditions in which it is operated. RFID tags are active with their own power supply and passive. Even passive tags are able not only to transmit their code to the scanner, but also to remember some brief information in the process of “communicating” with the scanner.
The RFID tag reader can be stationary or handheld. Hand-held RFID scanners are conditionally divided into scanners and terminals. Terminals allow you to perform some additional actions during the tag identification process. For example, when scanning clothes. The RFID terminal only receives the tag code, and after that, using the internal software, it determines what kind of clothing, size, manufacturer, etc. by the tag number. In addition, using the terminal, you can not only read product information, but also change the description of related information. Scanners and tags are divided by the frequency range in which they operate.
Possible problems in using RFID systems
The effectiveness of the action of the frame and label can be significantly reduced if the attacker uses bags with a "metal shield". If the anti-theft system began to malfunction and frequent false positives. The main cause should be sought in the interference sources.
1. The location of the frame itself or large metal objects next to it may have changed.
2. Perhaps somewhere in the neighborhood other anti-theft gates have appeared or their settings have changed at the neighboring "boutique".
3. Some new light sources with high-frequency power supplies may have appeared.
Company INFORMBURO
Atyrau Azattyk Avenue 96b office 502
E-mail: informbyuro@yandex.ru
tel. (7122)451533, 451532, 451537
Differences in RF and magnetoacoustic systems
Tips for choosing anti-theft tags
When using RFID control systems, the following factors should be considered.
RF anti-theft gates are a simpler legacy technology. Magneto-acoustic systems do not fundamentally differ from radio frequency systems, but have more high sensitivity and noise immunity. But at the same time, magneto-acoustic systems are much more expensive and difficult to set up equipment.
For each of these types of RFID systems, special tags are used that are NOT INTERCHANGEABLE!!
The work of anti-theft frames can be affected by nearby metal objects, electronic devices such as fluorescent lamps, microwave ovens, and other anti-theft gates.
Since a good result in terms of control reliability can be achieved only for narrow passages of 1-1.2 measures, wide exit zones have to be equipped with a chain of anti-theft frames. In stores where more than 2 frames in a line are used, only more expensive magnetoacoustic systems can be used.
The larger the size of the tag, the more sensitive the system becomes, the more reliable the protection will be. In addition, the shape and version of the labels are of great importance. Tags made in the form of disposable paper stickers are less sensitive and, as a result, less reliable than tags in a plastic case. But under any condition for radio-frequency frames with large marks, the passage width for reliable operation is no more than 1.5 meters. For magneto-acoustic systems up to 2 meters. The reliability of the anti-theft frame is affected by how fast it will pass through the frame mark, the faster the less reliable. The location of the label itself relative to the frame also affects. Therefore, when installing the system, reliable operation is achieved at any location of a specific label in the frame coverage area.
The difference between anti-theft tags from passive and active RFID tags
Anti-theft tags do not have a unique number; they have a simple task only to "work" inside frame. Passive tags only allow you to read information. Active tags read and write.
Features of using RFID systems leave their mark on the type of equipment used equipment. In warehouse accounting, it is important that the label is read at a large distance of 2-3 meters, so expensive systems are used. Or you should switch to a barcode scanner if possible. Optical recognition technology barcode works at a greater distance, but only if the barcode or QR code is fully visible. The RFID reader reads the code even out of sight. A standard passive or even more so active tag is read at a small distance of no more than 50 cm or even less.