Access control, also known as access control system, is a digital management system that organically combines information technology, electronic technology and mechanical locks to identify people's access rights at an appropriate level and control them accordingly. The access control system designed in this scheme is a powerful intelligent network access control system based on non-contact inductive SM 1 card identification technology, which consists of management system, controller, inductive card reader and electronic lock. Persons with legal inductive SM 1 cards can automatically control the authorized electronic lock through SM 1 card reading equipment. The access control system replaces the traditional mechanical key, which reduces the trouble of key management and effectively avoids the loss of keys. At the same time, it can record and query the information of people entering and leaving, which has incomparable advantages over ordinary mechanical locks.

1. Use safely

Because part of the mechanical lock is outside, it is easy to open it with a key or other tools. The IC card access control system controls the opening and closing of the electronic lock by transmitting encrypted digital information.

Management safety

The key of a mechanical lock is easily lost or flowed out. For the sake of safety, the lock must be replaced. The IC card access control system only needs to report the loss of the card or cancel the permission.

3. Easy to use

One card can replace all the keys in the system. As long as one card is authorized, it can pass through all authorized areas. You don't need to bring a bunch of keys, it's very troublesome to open the door.

4. Convenient management.

Save the trouble of configuring and distributing keys. By setting permissions, it is easy to plan personnel access rights. Check the personnel access in each area at any time through the management software.

5. The system is flexible.

Additional functions that ordinary mechanical locks can't do, such as specifying the allowed passage time, can't pass even if there is a key in the non-allowed time, which further improves the safety. The connection with other systems improves the flexibility of the system.

6. Management science

The system truly records the time and place of personnel entering and leaving, and can query the personnel in the control area at any time.

Therefore, the application of induction card access control system has developed rapidly. 2. 1 control principle of access control system

Access control system unit access control is composed of the following:

The access control system is mainly composed of three layers: management system, controller and card reading host. The management system is responsible for personnel management, authorization, data collection, statistics and analysis. When the cardholder shakes the card in the sensing area of the card reader once, the card reader can sense that there is a card and send the information (card number) in the card to the host computer, which will verify the card and then decide whether to open the door.

The access control system can work online or offline. When working online, credit card data can be uploaded to the system in real time for monitoring and inquiry. When working offline, save the card data locally, and upload the data to the computer for processing after connecting to the network.

2.2 network structure

The access control system is composed of multiple units as required. According to the building structure and user needs, in order to achieve the purpose of convenient management, each unit door uses two card reading hosts, and it is necessary to swipe the card in and out. The controller in the independent building is connected into a network through RS485 or converted into a 485 network through TCP/IP, and then connected to the network server. Other remote controllers or remote controllers can use TCP/IP controllers to access Ethernet and then connect to the management system computer, as shown in the figure below.