RFID radio frequency identification is a non-contact automatic identification technology, which automatically recognizes the target object and obtains relevant data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. RFID technology can identify high-speed moving objects and can identify multiple tags at the same time, and the operation is quick and convenient. Short-distance radio frequency label tag products are not afraid of harsh environments such as oil stains and dust pollution, and can replace bar codes in such environments, for example, to track objects on the assembly line of a factory. Long-distance radio frequency label tag products are mostly used in traffic, and the identification distance can reach tens of meters, such as automatic toll collection or
vehicle identification.