Haikou Lianshengda Technology Development Co

Haikou Lianshengda Technology Development Co., Ltd. specializes in: surveillance systems, anti-theft alarm systems, building intercoms, integrated wiring, public broadcasting systems, intelligent communities, parking system construction and after-sales services. It is a high-tech company that undertakes Hainan surveillance installations. , Hainan monitor installation and weak current integrated wiring projects such as closed-circuit monitoring systems, anti-theft alarm systems, public broadcasting systems, etc. in counties across the province, etc., to provide customers with the installation and maintenance of monitoring systems. The company has professional construction and sales personnel and Perfect after-sales service system. Access control systems can be divided into the following three categories according to the entry and exit identification methods:
Password identification: Identify entry and exit permissions by checking whether the entered password is correct.
This type of product is divided into two categories: one is the ordinary type, and the other is the scrambled keyboard type (the numbers on the keyboard are not fixed and change automatically from time to time).
Ordinary type: Advantages: Easy to operate, no need to carry cards, low cost. Disadvantages: It can only accommodate three sets of passwords at the same time, which is easy to leak, and the security is very poor. There is no entry and exit records and only one-way control.
Sequential keyboard type (the numbers on the keyboard are not fixed and change automatically from time to time): Advantages: Easy to operate, no need to carry cards, slightly higher security factor Disadvantages: Passwords are easily leaked, security is still not high No entry and exit records only It can be controlled in one direction and the cost is high.
. Card identification: identify access permissions by reading the card or reading the card and adding a password.
According to the card type, it is divided into:
Magnetic card: Advantages: lower cost, one card per person (+ password ), generally safe, can be connected to a microcomputer, and has door opening records. Disadvantages: Cards and equipment are worn, and their lifespan is short. Cards are easy to copy and difficult to control in two directions. Card information is easily lost due to external magnetic fields, rendering the card invalid.
Radio frequency card: Advantages: card, no contact with the device, easy to open the door, safe and long life, theoretical data of at least ten years, high security, can be connected to a computer, and there is a record of opening the door to achieve two-way control. Cards are difficult to copy Disadvantages: Higher cost.
, Portrait recognition: Identify entry and exit by checking people's biometric characteristics. There are fingerprint type, iris type, and facial recognition type. Advantages: From an identification point of view, security is excellent and there is no need to carry a card.
Disadvantages: High cost. The recognition rate is not high, it has high environmental requirements, high requirements for users (such as fingerprints cannot be scratched, eyes cannot be red, swollen and bleeding, faces cannot have injuries, or beards), and it is inconvenient to use (such as iris type and facial recognition) type, the installation height and position are fixed, but the user's height is different)
It is worth noting that most people think that biometric access control systems are very safe. In fact, this is a misunderstanding. The security of access control systems is not just about identification. The security of the method also includes the security of the control system, the security of the software system, the security of the communication system, and the security of the power system. The entire system is a whole. If any aspect is not up to standard, the entire system will be unsafe. For example, in some fingerprint access control systems, the controller and fingerprint reader are integrated, and they must be installed outdoors. In this way, the wires that control the lock switch are exposed outdoors and can easily be opened. Access control systems can be divided into the following two categories according to design principles:
． The controller comes with a card reader (identifier): The disadvantage of this design is that the controller must be installed outside the door, so part of the control wires must be exposed outside the door. An insider can easily open the door without a card or password.
． The controller and card reader (identifier) are separated: this type of system controller is installed indoors, only the card reader input line is exposed outdoors, all other control lines are indoors, and the card reader transmits digital signals , therefore, no one can enter without a valid card or password.
Access control is an indispensable part of today's society. Having access control means you are guaranteed. Interested parties are welcome to call us for consultation and negotiation!
Contact number: Miss Wang
Company name: Haikou Lianshengda Technology Development Co., Ltd.
Company address: Unit Room, Huilong Plaza, Longkun South Road, Qiongshan District, Haikou City