NFC cards is the abbreviation of Near Field Communication, which is short-range wireless communication technology cards. Originally developed by Philips and Sony, NFC is a contactless identification and interconnect technology for close-range wireless communication between mobile devices, consumer electronics, PCs and smart control tools. NFC provides a simple, touch-enabled solution that allows consumers to easily and intuitively exchange information and access content and services.
At home and abroad, the Swedish hotel has actually applied the corresponding NFC door locks introduced by Assa Abloy, mainly using different identification codes of NFC mobile phones as the Mac ID and the encryption mechanism of the corresponding program to open the door lock. In terms of RFID electronic locks for NFC technology, the domestic market is still in a technical gap. At last year's Cedia EXPO, Yale Lock & Hardware exhibited NFC-enabled home door lock systems and hoped to enter the NFC international market smoothly. Through this system, you will be able to easily open the electric door lock designed by Yale by simply bringing your smart phone closer to the door lock. Of course, you must have the right to unlock the lock.
RFID cards
Non-contact radio frequency identification （RFID） is also a wireless communication technology that also transmits data through wireless electromagnetic waves. However, unlike general communication technology, its purpose is not to make a phone call or send a text message. RFID is mainly used to identify and track the tags bound to objects, thus realizing the management of objects.
RFID technology is widely used in warehousing logistics to track goods，RFID systems use tags to identify objects. In addition to the tag, the RFID system also has a two-way wireless transceiver called the Interrogator/Reader that sends a signal to the tag and reads the tag's feedback.
RFID system consists of readers and tags
RFID is divided into passive RFID and active RFID. Passive RFID generally refers to passive RFID without a battery, which relies entirely on receiving electromagnetic waves to drive the circuit to work, and the identifiable distance of the tag does not change. Active RFID systems generally refer to active RFID tags whose identifiable distance decreases as power is reduced.
ETC system with RFID technology makes travel more convenient
Active RFID generally has a long recognition distance. For example, ETC systems for highway toll stations and automatic parking lots generally use active RFID operating at 2.4 GHz. However, there is a battery in the ETC tag. If the battery is dead, you need to replace the battery to work.
