Multi Read Rate is key important to RFID UHF Labels. In the actual RFID application, we often require to read a large number of UHF labels at the same time. Such as goods quantity inventory in the warehouse. Books number inventory in the library scene, and also include dozens or even hundreds on conveyor belts or pallets. Not to mention cargo labels Reading. In reading most goods cases, we call the successfully read probability “the reading rate”.
In the hope that the reading distance is longer and the radio wave scanning range is wider. We generally use UHF RFID. Therefore, in logistics and supply chain field, technicians chose UHF RFID technology worldwide. Hence, the author will further elaborate on UHF RFID reading rate issue.
What are the factors that affect the UHF RFID read rate?
In addition to the reading distance and scanning direction, still many other factors affect the reading rate. For example, firstly, the goods movement speed at the entrance and exit. Secondly, the communication speed between the label and the reader. Thirdly, past goods and outer packaging material. Fourthly, the goods place way. Fifthly, the environment temperature and humidity. Sixthly, the ceiling height. Seventhly, the reader and read influence between the devices and so on.
I believe that after reading the above description, you must realize that in the actual application of RFID. External environment is actually very easy to affect the reading rate. And these different environmental factors intertwines with each other. Which together constitute the key needs overcome difficulty in RFID projects implementation.
How to improve the RFID multi-tags read rate?
If you want to increase the reading rate of multiple tags, you have to start from the reading principle.
In multi-tag reading, the reader first queries, and the tags respond to the reader’s query successively. If multiple tags respond at the same time during the reading process, the reader will query again. And the reader will mark the queried tag to make it “sleep”. That is, to prevent reader to read it again. In this way, the reader and the tag carried out high-speed data exchange processing. We always call this process as congestion control and anti-collision.
If you want to increase the reading rate of multiple tags. You can expand the reading range and extend the reading time. And you can also increase the number of information exchanges between the tag and the reader. In addition, the high-speed communication method between the reader and the tag can also increase the reading rate.
However, in reality, the situation is too complicated. For example, sometimes the cats may load metal goods, which may cause the tags unreadable at some angles. Therefore, the antenna direction and the goods placement are very important factors. In that case, technicians need to make reasonable design. So that to make the reader read the tag from all angles as much as possible.
Last but not least, a batch of high-quality labels are key factors in reducing the missed reading rate. When choosing labels and card machines, you must choose certified products and experienced hardware suppliers.