Generally speaking, these three situations will cause RFID tag failure. The first case is the tag damage: because the RFID electronic tag has a chip, if the chip is pressed by external force or destroyed by high static electricity, it may cause failure. . If the RFID signal is damaged by the antenna, it will also cause failure. Therefore, RFID electronic tags must not be damaged or torn by compression, so most demanding RFID electronic tags will be packed in plastic cards to avoid damage by external forces.
The second case is that the tag is not damaged, but it cannot be scanned, because the RFID electronic tag cannot penetrate the metal, so the metal can shield the tag, and the tag is also difficult to penetrate the water, because the water can absorb waves, so the sensing distance is also There will be restrictions.
Therefore, when covered, RFID can penetrate non-metallic or non-transparent materials such as paper, wood, and plastic, so as to enable penetrating communication, and the bar code scanner must be in close range and there is no object blocking, In order to read the barcode.
There is also a failure because the reading distance is too far. In the relevant identification process, the actual effective reading distance of the tag is greatly shortened or simply does not respond, and the reading fails completely. Practice has proved that such interference problems occur frequently, and we need to take certain measures to prevent them.