Radio frequency identification (RFID) is a wireless communication technology derived from radar technology in the 1950s. It uses radio signals to identify specific targets, read and write related data, and exchange data with the identified targets. Everyone feels strange to hear its name, but in fact it is closely related to our lives. Commonly used ID cards and campus cards use this technology. To understand radio frequency identification technology, we must first understand the radio frequency identification system.

The hardware of the radio frequency identification system is mainly composed of three parts: radio frequency tags, readers, and transceiver antennas.

1. Radio frequency tag: also known as electronic tag, it contains a chip that stores electronic data and a built-in antenna. The electronic data in the chip can be used as identifying information for identifying items.

2. Reader: It is a device used to read or write the information in the electronic tag. Its main function is to control the radio frequency module in it to transmit signals to the tag, receive the response information from the tag, decode the data, and Upload to the host through the interface for processing.

3.Transceiving antenna: it is a transmitting and receiving device for transmitting data between the reader and the tag

After understanding the components of the radio frequency identification system, its working principle is very simple: first, the reader emits specific electromagnetic waves through its antenna, and when the electronic tag enters the working range of the transmitting antenna, it will induce induction The current becomes active, and the internally stored information is sent out through the antenna; the reader's antenna receives the signal from the electronic tag, then demodulates and decodes the signal, and then uploads it to the background host system for processing.

So what are the advantages of RFID? It has the characteristics of long service life, good safety, etc., its scanning is fast, and it is convenient and quick to use. RFID is not limited by the size and shape of the chip in information reading, and can be applied to a variety of different products. It has strong anti-pollution ability and strong resistance to water and some chemicals. Compared with some barcodes that cannot be changed after printing, RFID tags can modify and delete their internal data multiple times to facilitate information update. RFID can also be read remotely, which can greatly improve the efficiency of enterprise information management.

Because of the advantages of radio frequency identification technology, its application scenarios are also quite broad. RFID technology information can be read quickly. It can be used to identify the information of electronic documents such as ID cards and student cards; it can greatly improve logistics efficiency in the field of logistics warehousing. It can track goods in logistics and automatically collect information and data; RFID It is also difficult to forge and can be used for anti-counterfeiting of some valuables and tickets; it can also be used in the security control system to monitor the archives in time and alarm for abnormalities to avoid file damage, theft, etc.