Explain the characteristics and principles of the proximity card

February 16 06:09:00, 2020

[ Huaqiang Security Network News ] Speaking of the proximity card, everyone may have known it, because the listing of the proximity card gives the user no need to carry the key, and it eliminates the trouble of copying the key, and no longer has to worry about the property. bear the loss. There are many types of inductive signal transmitters, including card type, key ring type, pen type, glass tube type, microphone pen, etc., the volume has a size difference, and the volume is often proportional to the sensing distance. Generally speaking, when the user is in the control of the access control and the parking lot, in order to facilitate carrying, it is usually made into a card type, so it is commonly called a proximity card.
The principle of action:
The Promixity Card is generally referred to as a contact card. The magnetic card must be "swapped" during use to achieve regulatory purposes. Usually, a sensor card has an IC chip, an induction coil, and an original capacitor. The proximity card is the transmitting response end, and the inductive card reader is the receiving end, similar to the generator, and continuously transmits the frequency. When the card is within the range of the card reader's transmission frequency, the coil inside the card will accept this frequency and generate energy. This energy is stored in the capacitor. When the energy reaches the state of excitation, it will be burned on the IC chip in the card. The password is sent to the card reader. After the card reader has been identified, the door can be opened. The frequency of the card readers of the various brands in the workshop is different, so the cards will not be interoperable and the use situation will occur.
The main purpose of setting up the access control management system is to ensure the safety of equipment in the above-mentioned areas and areas, to facilitate the reasonable flow of personnel, and to implement various modes of access control for personnel entering these important areas in order to restrict personnel from entering and leaving at will. When an employee wants to enter a controlled area, he must first swipe the card in the card reader next to the door to open the door. Each door reader is controlled by the monitoring terminal through the on-site control interface unit and the system centralized controller. Each card can only open the specified range of doors within the specified time according to the system settings. At the same time, it prevents foreigners from entering the house casually. If someone breaks the door forcibly or does not close the door after work, the access control device will send out an alarm signal, and the door number of the alarm will be displayed immediately on the monitoring terminal. The purpose of the access control system design is to achieve access control and access information records.
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