Swiping the card is one of the ways to open the door of the Smart Door Lock. For the elderly and children who tend to forget the password and have shallow fingerprints that may be rejected, it is a better solution to carry the card with you to open the door.
Traditional antennas transmit electromagnetic signals by radiating electromagnetic waves into the air. The antenna works in the far-field area. In order to radiate electromagnetic signals into the air, the length of the antenna needs to be comparable to the working wavelength. The basic working principle of RFID technology is not complicated: after the tag enters the magnetic field, it receives the radio frequency signal sent by the reader, and sends out the product information stored in the chip by virtue of the energy obtained by the induced current (Passive Tag, passive tag or passive tag) , or the tag actively sends a signal of a certain frequency (Active Tag, active tag or active tag), the reader reads and decodes the information, and sends it to the central information system for relevant data processing. This way of swiping the card to open the door is very popular in hotel and community access control. The hotel's room service needs to often enter the unmanned room for cleaning, so the cleaning staff will have a master key card to facilitate access to the hotel room. The reason why card locks have become popular is because there are no small security risks. Cards are very easy to lose, not only difficult to get back, but also bring certain dangers to the family. After all, there are places downstairs where the key cards can be copied in many residential areas. If you are not careful, "one instant noodle" will open up the entire community. Swipe card lock and smart door lock are two kinds of door locks commonly used by Hotel Lock 1. Swipe Door Lock. It can be opened by using the access control card, which is in line with the usage habits of traditional people, and it is more suitable for hotels with centralized management. More than ten years of classic products, stable and reliable, easy to install and use. 2. Smart Door Lock. It can be opened with access control card, password, applet, and more advanced applications can be opened with face recognition PAD. Try out new products that are popular this year. B&B suitable for decentralized management, unmanned hotel without front desk.
The hotel key card is a kind of radio frequency identification technology RFID, which is used to control, detect and track objects. The system consists of an interrogator (or reader) and many transponders (or tags). At present, RFID technology is widely used, such as: libraries, access control systems, food safety traceability, etc.
