The main purpose of access control system is to prevent loss and crime, so it must have high reliability.
An access control system may not give an alarm most of the time, so there is no need to give an alarm. The probability of alarm is generally very small, but if the alarm system fails within this very small probability, it often means disaster arrival. Therefore, reliability design (redundancy design) and reliability management must be implemented at all stages of the design, construction and use of access control security system to ensure the high reliability of products and systems.
Extended data:
Access control system can be divided into password identification, card identification and biometric identification.
1, password identification, which identifies the access right by checking whether the entered password is correct. This kind of products are divided into two categories: one is the ordinary type, and the other is the disordered keyboard type (the numbers on the keyboard are not fixed and change automatically from time to time).
2. Card identification, that is, using card reading or card reading plus password to identify access rights, can be divided into magnetic card and radio frequency card according to the type of card.
3. Biometrics, i.e. identifying the discrepancy by checking the biometric characteristics of the personnel. There are fingerprint type, finger vein type, iris type and facial recognition type.
Baidu Encyclopedia-Access Control
Baidu encyclopedia-access control system