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The advantages and disadvantages of RFID

2019-09-27 17:20:32

According to a study by Technavio Research, the global retail RFID application market is expected to reach $3.91 billion by 2019, and the global RFID market for such applications will grow at a compound annual growth rate of 40% during the forecast period. Conceptually, RFID is similar to bar code technology. The barcode technology attaches the barcode information to the items, and scans the barcode on the items through the scanner to obtain the information of the items. The RFID technology attaches the RFID tag to the item, and reads the information in the tag into the RFID reader through the radio frequency signal, thereby obtaining the unique information of the item. Compared to traditional barcodes, the advantages of FRID technology are as follows:


1, Fast scanning


The RFID reader can simultaneously recognize and read multiple RFID tags, in contrast, only one bar code can be scanned at a time.


2, Penetrating and barrier-free reading


In the case of being covered, RFID can penetrate non-metallic or non-transparent materials such as paper, wood and plastic, and can communicate transparently. The reason why "unmanned retail stores" can achieve unoccupied cash is mainly to take advantage of this feature of RFID technology.


3, Larger memory capacity


The capacity of the one-dimensional barcode is about 30 characters, the maximum capacity of the two-dimensional barcode can be stored from 2 to 3000 characters, and the maximum capacity of the RFID is several mega-characters. With the development of the memory carrier, the data capacity is also expanding.


4, Compact, diverse shapes


RFID is not limited in size and shape during reading. It does not need to match the fixed size and print quality of the paper for reading accuracy, unlike the problem that the barcode is prone to deformation and breakage and cannot be recognized.


However, in fact, although the current low frequency and high-frequency bands have been widely used in China, such as campus cards, ID cards, and mobile phone NFC modules, in the consumer field, bar codes can basically satisfy the description ability of individual items and are promoted. At that time, there is a mature supporting system, and RFID tags cannot replace barcodes. Therefore, it is not an easy task to completely replace barcodes with RFID tags, and at least face the following challenges in terms of popularity:


1. Cost


Although the cost of RFID tags, readers, and software has been declining, the cost of RFID deployment is still unaffordable for many companies that want to track product inventory.


2. Technical standards are difficult to unify


For the technical standards of RFID, it is difficult to be unified at the international level, which makes product development and application positioning more chaotic.


3, the reading accuracy needs to be improved


Data integrity and correctness are important factors in determining the performance of RFID systems. Multi-target recognition is not only the biggest advantage of RFID, but also a technical difficulty that needs to be solved urgently.\


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