In the practical application of RFID, it is often necessary to read a large number of labels at the same time, such as the number of goods in stock, the number of books in the library scene, and the reading of dozens or even hundreds of goods labels on the conveyor belt or tray. For most goods, the reading rate is called the reading rate according to the probability of successful reading.
In the hope that the reading distance is farther and the radio wave scanning range is wider, UHF RFID is generally used. Therefore, in the field of logistics and supply chain, UHF RFID technology should be selected globally. Therefore, the small series will be aimed at UHF. RFID further discusses the problem of reading rate.
What are the factors that affect the UHF RFID cards reading rate?
In addition to the above reading distance and scanning direction, the reading rate is also affected by many other factors. For example, the movement speed of goods at the import and export, the communication speed between labels and readers, the materials for pasting goods and outer packaging, the placement method of goods, the temperature and humidity of the environment, the height of the ceiling, and the influence between reader/writers.
I believe that after reading the above, you will realize that in the actual application of RFID in the scene, it is easy to be affected by the external environment. These different environmental elements complement each other and together constitute the key difficulties to be overcome in the implementation of RFID projects.
How to improve RFID multi tag reading rate
To improve the reading rate of multiple tags, we must start with the reading principle.
When reading multiple tags, the reader queries first, and the tags respond to the reader's query successively. If multiple tags are responded to at the same time during reading, the reader will query again, and the queried tag will be marked and allowed to "sleep" to prevent it from being read again. In this way, the high-speed data exchange between RFID readers and labels is called congestion control and anti-collision.
To improve the reading rate of multiple tags, we can expand the reading range, increase the reading time, and increase the frequency of information exchange between tags and readers. In addition, the high-speed communication between reader and UHF card can also improve the reading rate.
However, in reality, the situation is indeed too complicated. For example, sometimes the goods are equipped with metal products, which may cause some viewing angles to be unable to read the UHF RFID card. Therefore, the direction of the antenna and the location of the goods are very important factors, and reasonable design is needed to make the reader and writer read the UHF cards from all angles as far as possible.
Moreover, even if all kinds of work are done, there may be other unexpected situations, such as the electronic label itself is broken.
OPRFID Technology Online Website:
Click links for more information about RFID technolgy:
https://hearthis.at/oprfid123/6993870wtv9231937/eL8/
http://toparticlesubmissionsites.com/rfid-technology-system-improves-warehouse-management-ability/
https://www.discussionpoint.org/forum/showthread.php?tid=5067
https://www.mepits.com/forum/post/param/605
https://potswap.club/blogs/5865/Warehouse-Management-System-Based-On-Rfid-Reader
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