No one will argue about the simplicity and convenience of using contactless cards, are actively replacing mechanical locks, break the established control at checkpoints enterprises, offices, public spaces with controlled access (library, entertaining and educational institutions, subway). Maps are part of the intelligent system access control in Orel, improve safety and efficiency of any business and services.
gradually, but surely fading outdated fencing, wickets, or they are equipped with a modern lock and passage control systems. In place of metal keys, or rather their hefty bundles, which previously was present in the pocket or purse of each person with an active lifestyle, came contactless electronic card. These cards we use for, to pay and pass through an electronic turnstile in the subway, open the door of the house porch, go to classes in the educational building of the university. It is notable, that little plastic card, which is located in a wallet or pouch phone (that actually greatly harms his work, but that is where many store them), can replace up 15 keys in conjunction. That's the number of sectors in a plastic microchip badge.
Technically, пластиковый пропуск состоит из трех частей:
- a rectangular piece of plastic, It is a kind of housing for all devices;
- microchip - in terms of computer technology - 1 Kbytes of non-volatile memory;
- antenna - which works as an electronic signal receiver and transmitter.
All access control system in Orel, и также сам процесс работы бесконтактной карты и электронного пропускного устройства вяглядит следующим образом.
The controller reads the turnstile device in the ON state constantly emits electromagnetic waves at a frequency 13,56 MHz, closeup capable of inducing an electric current in card antenna. The incoming voltage is sufficient, to charge the chip, to initiate the necessary sector, exchange encryption controller, modulate and correct their own data memory.
After that, How to activate the antenna, microchip detects, What was his sector needs to be charged, that he passed on the information stored on it and the keys to decrypt the crossing controller mechanism. tourniquet, receiving this information, decrypts it and compares it with the presence of such a card in its own database, in turn, sending a signal to the card, которая должна дешифровать его и идентифицировать считывающее устройства турникета. This mutual authentication of devices is crucial, because if it was not carried out, then go over the fence or put money could be any card with any reader controller. Хотя одна карта может быть запрограммирована под несколько считывающих устройств.
