Excuse me, how is the unit door of the community opened? I saw what they pressed, and it opened automatically. And I just pressed the security guard and shouted to open the door! I opened the door.

This is the access control system installed in the community, and the owner needs to apply for an IC card to open the door. For convenience, when you go out from the community, you can directly press the switch button at the door to open the door without swiping the card, but when you come in, you need the IC card of the property office to enter. If you forget to bring your access card, you can ask the security guard to open the door, but you will ask which building to go to and confirm whether it is the owner or a visiting friend.

Extended data:

system classification

Identify by entering and exiting.

According to the way of access control identification, access control systems can be divided into the following four categories:

Password identification

Password identification: Identify the access right by checking whether the entered password is correct.

Products are divided into two categories: one is common,

One kind is disordered keyboard (the numbers on the keyboard are not fixed and change automatically from time to time).

Common type:

Advantages: convenient operation, no need to carry cards.

Disadvantages: only three sets of passwords can be accommodated at the same time, which is easy to leak; No entry and exit records;

Can only control one direction.

Out-of-order keyboard type (the numbers on the keyboard are not fixed and will change automatically from time to time):

Advantages: convenient operation, no need to carry cards.

Disadvantages: passwords are easy to leak; No entry and exit records; Can only control one direction.

Card recognition

Card identification: access rights are identified by reading cards or reading cards with passwords, which are divided into two categories according to the types of cards.

magnetic card

Advantages: one card per person (+password), can be connected to a microcomputer, and has a door opening record.

Disadvantages: the card and equipment are worn and the service life is short; Cards are easy to copy; Both directions are difficult to control.

Due to the external magnetic field, the card information is easily lost.

Radio frequency card

Advantages: no contact between the card and the equipment, convenient and safe door opening; Long service life and theoretical data of at least ten years;

High security, can be connected to a microcomputer, and has a door opening record; Bidirectional control can be realized. Cards are difficult to copy.

Disadvantages: high cost

Biometrics

Biometrics: Identify the discrepancy by checking the biometric characteristics of the personnel.

There are fingerprint, palm, iris, face recognition and finger vein recognition.

Advantages: no need to bring a card, safe.

Disadvantages: high cost. The recognition rate is not high, and the requirements for the environment are high.

High requirements for users (such as fingerprints can't be scratched, eyes can't be red, swollen and bleeding, face can't be injured, or the number of beards),

It is very inconvenient to use.

QR code recognition

Features:

1, safe, simple and convenient.

2. Novel and fashionable QR code, obtained by mobile phone, can be forwarded.

Because the mobile phone belongs to the essential personal belongings of users, it is very convenient to use.

3. The forbidden system can support multiple ways of voucher verification.

4. Access control system platform provides accurate statistical data.

Baidu Encyclopedia-System Classification