In the practical application of RFID, it is often required to read a large number of smart RFID tags at the same time, such as the inventory of the number of goods in the warehouse, the inventory of 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 of the goods read, the probability of success is called read rate.
UHF smart RFID tags are generally used in the hope of reading farther distances and a wider scanning range of radio waves. Therefore, in the field of logistics and supply chain, UHF RFID technology is adopted worldwide
What are the factors that affect the smart RFID tags read rate?
The read rate is influenced by many other factors besides the read distance and scan direction mentioned above. For example, the movement speed of goods at the entrance and exit, the communication speed between labels and readers, the material used to paste goods and outer packaging, the placement of goods, the temperature and humidity of the environment, the height of the ceiling, and the influence between readers and readers, etc
How to improve smart RFID tags read rate?
If you want to improve the smart RFID tags read rate, you have to start from the reading principle.
In multi-tag reads, the reader queries first, and the tag responds to the reader’s queries in turn. If more than one tag responds during the reading process, the reader searches again, marking the tag to “sleep” and preventing it from being read again. In this way, high-speed data exchange between readers and tags takes place, a process known as congestion control and collision prevention.
To improve the read rate of smart RFID tags, you can expand the read range and prolong the read time, and increase the number of information exchanges between tags and readers. In addition, high-speed communication between the reader and the tag can also improve the read rate.
In the real world, however, the situation is far too complicated. For example, sometimes goods contain metal goods, which may make the labels unreadable at some angles. Therefore, the direction of the antenna and the position of the goods are very important factors. Reasonable design is required to make the reader read the label from all angles as far as possible.
And even when everything is done, other surprises can occur, such as the fact that the tag itself may be broken.
