Access Control System is in the field of intelligent buildings, meaning Access Control System, abbreviated as ACS. Refers to the prohibited authority of the "door", It's a guard against the 'gate'. The 'gate' here Broadly speaking, it includes various channels that can be accessed, including doors for people to pass through and doors for vehicles to pass through. Therefore, access control includes vehicle access control. In the application of parking lot management, vehicle access control is an important means of vehicle management, not for the purpose of collecting parking fees, but mainly for managing vehicle access permissions Application requirements: Reliable access control systems are primarily designed to prevent losses and crime, therefore they must have extremely high reliability. An access control system may not require an alarm during most of its operation, and therefore does not require an alarm. The probability of an alarm occurring is generally very small, but if the alarm system malfunctions within this very small probability, it often indicates the arrival of a disaster. Therefore, the access control security system must implement reliability design (redundant design) and reliability management in all stages of design, construction, and use to ensure high reliability of products and systems Certification: In addition, in the design, equipment selection, debugging, installation and other aspects of the system, relevant national or industry standards are strictly followed, as well as the requirements of the public security department for safety technology prevention. The product must undergo multiple certifications and has a large number of typical users, and has been running normally for many years The security access control and security system is used to protect the safety of personnel and property, therefore the system itself must be secure. The high safety referred to here, on the one hand, refers to the natural or quasi natural properties of the product or system, which should ensure the safety of the equipment and system operation and the safety of the operator. For example, the equipment and system itself should be able to prevent high temperature, low temperature, warmth, smoke, mold, rain, radiation, electromagnetic interference (electromagnetic compatibility), impact, collision, and drop. The operational safety of the equipment and system also includes fire prevention Lightning protection, explosion-proof, electric shock prevention, etc; On the other hand, the access control and security system should also have the function of preventing human damage, such as having a protective shell that prevents damage, as well as having anti demolition alarms, anti short circuits, and open circuits With the continuous improvement of people's requirements for various aspects of access control systems, the application range of access control systems is becoming increasingly widespread. People's application of access control systems is no longer limited to a single entrance and exit control, but also requires that they can be applied not only to access control, attendance management, security alarm, parking lot control, elevator control, building automation, etc. of intelligent buildings or communities, but also to various control functions such as linkage control with other systems