RFID is mainly used in the Internet of things in perceptual recognition layer, is short for radio frequency identification (Radio Frequency Identification), is to use can be used in wireless communication (radio frequency) electromagnetic waves to automatically identify individual non-contact automatic identification technology, such as is common in daily life of the public traffic card system, entrance guard system.
In terms of system composition, the most basic RFID systems include RFID electronic tags, RFID readers, antennas, and computer systems that record and process information. In terms of working principle, the RFID reader antenna to send electronic signals, after receiving the signal, the RFID electronic tag will launch internal storage identification information, may pass the RFID reader antenna and identification of electronic label to send back the information, the results identified by the RFID reader will eventually sent to the host.
RFID electronic tags, also known as smart labels, are labels that use RFID technology and have a certain memory chip. In general, the complete RFID electronic tag consists of a chip, an antenna, a paper medium (or a plastic medium) substrate. There are two data areas in the chip, respectively the ID zone and the user data area. The ID area is used to store the world's unique ID code UID (stored in ROM when making the chip, which cannot be modified); User data areas are available for users to store data, to read, write, modify, or add operations. At the same time, RFID electronic tag antennas are devices that realize the propagation of rf signal space and establish a wireless communication connection.
Worth mentioning is that although the widely used non-contact IC card (such as the common people, urban transportation IC card, etc.) of the second generation id card with general RFID electronic tag sometimes use the same frequency (13.56 MHz), but as a result of both between the reader and the wireless communication protocol is different, so both unable to gm, but we should not confuse between the two. Not only that, non-contact IC CARDS differ from RFID electronic tags in terms of communication distance, shape, management object, unit price, etc.
Above is about the Internet of RFID technology, if you want to know more about the Internet of things the RFID information, pay more attention to ZDCARD will provide you with more information, more detailed and updated information