Core Tip: In modern intelligent building construction, the electronic access control system not only enhances the intelligence of buildings, but also enhances the image of the building. It is also an important part of the intelligent building security system.
In modern intelligent building construction, the electronic access control system not only enhances the intelligence of buildings, but also enhances the image of the building. It is also an important part of the intelligent building security system. Since the access control system has played a controlling role in the entrance and exit of building buildings, he has also become an important barrier for building security.
I. Overview of intelligent buildings
In modern intelligent building construction, the electronic access control system not only enhances the intelligence of buildings, but also enhances the image of the building. It is also an important part of the intelligent building security system. Since the access control system has played a controlling role in the entrance and exit of building buildings, he has also become an important barrier for building security.
Second, the functional requirements of intelligent buildings for access control systems
In modern intelligent building construction, due to the different functions of the building, the protection level requirements for the security system are different. Therefore, the functional requirements of the access control system are also different due to different levels of protection. At the same time, due to the different building structures of various intelligent buildings, the composition and structure of the access control system and equipment selection requirements are also different.
2.1 Access Control System Functional Requirements Analysis
1. Control of the gate area
The primary task of the access control system is to complete the control of the gate area and realize the authorized personnel to enter the prescribed door area at the specified time. At the same time, in order to ensure the safety of the door area, it is also required that the door be opened for more than a certain period of time, and there must be an alarm prompt to avoid the safety hazard caused by human beings forgetting to close the door.
In the way of opening the door, it is also required to open the door with a card, open the card with a password, and open the door with a pure password. In addition, in a specific intelligent building, it is required to realize the interlock function of the two adjacent doors, that is, when one door is opened, the other door cannot be opened. In prisons, detention centers and other places, the "anti-coercive password alarm" function is also required to ensure that personal safety and clever alarms can be ensured when the police on duty are held hostage.
2, online patrol
Security inspections are indispensable in smart buildings. The traditional offline patrol record can not be transmitted into the system in real time, and the degree of intelligence is not high. The card reader of the access control system can be directly used as a patrol point to realize online real-time upload of the patrol record. The card reader in the access control system is used as the patrol point, and the ID card is used as the carrier of the patrol to realize real-time uploading of the patrol record. On the one hand, the online patrol system enhances the intelligence of the patrol management system. On the other hand, it also enhances the security protection level of the system for key protection places.
3, and monitoring linkage
The monitoring system is the basic system for security protection in intelligent buildings. As a security barrier access control system, the linkage between the monitoring and monitoring images can better complement the functions of the two subsystems and block security loopholes.
The linkage between access control and monitoring includes access control card linkage capture, access control card linkage video recording, access control card linkage pop-up video image and so on.
4, and fire linkage
The fire protection system is an indispensable part of the intelligent building. When a fire or other situation occurs, the fire protection system will initiate corresponding measures. In the event of a fire, the access control system must respond in time to open the corresponding door area to ensure the evacuation of personnel. Therefore, the linkage between access control and fire protection systems is essential in intelligent building construction.
2.2 System structure composition requirements
1. Bus requirements for different environments
Different building structures have different requirements for the bus connection of the access control system. A small and medium-sized access control system can be connected to the RS485 bus in an environment where the distance between the doors and the door is not large. However, the building structure is complicated, and the distance between the door and the door exceeds the transmission capacity of the RS485 bus, and the data transmission of the system is often selected by using the existing TCP/IP network in the building.
2. Choice of readers for different environments
For the built environment with high protection level, the access control system is required to open the door with “Card Password†or “Pure Passwordâ€. When selecting the card reader, you must choose to have a keyboard reader.
In some outdoor installations that do not require a password function, a card reader without a keyboard is required.
In addition, depending on the card used, an ID card reader with a card reading frequency of 125 KHz and an IC card reader with a card reading frequency of 13.56 MHz are generally used.
3. Requirements for the working mode of the access control system
The access control system in the general intelligent building will require real-time uploading of the entry and exit records, so that the control center can timely grasp the entry and exit of each door area. In the case of system communication interruption, the access control system is required to have the ability to work offline, save the entry and exit records in the offline state, and upload the control center when the communication is restored.
4. Requirements for easy maintenance
As an important barrier to intelligent building security systems, access control systems must have good maintainability. First of all, we must ensure that there is a problem at one point and it will not affect the normal operation of other devices in the system. Secondly, it is required that the system has a certain fault self-diagnosis function.
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Tags: access control system intelligent building security application
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