The composition of entrance guard system structure
2022-07-08 00:00:00
entrance guard system seems too complicated, we decided how to make it easy to understand?We can understand the entrance guard system for a simple mechanical lock, because they are all belong to control technology, has a certain similarity principle, have the same basic elements, mainly for: features carrier, read (recognition) device, locking mechanism of the three.Through the analysis of the basic elements of mechanical lock, we can understand the composition of entrance guard system.
a, the characteristics of the carrier
is characterized with uniqueness and stability of the difference, can use the difference between individual identity, recognition, can also be said power, characteristic vector is one of the access control elements.
the identity of the object of access control management and permissions can be given by feature vector.Such as RFID, magnetic card, bar code, etc.;Also can use the characteristics of the object itself has to represent, such as facial features, such as fingerprint biometric.
mechanical lock is complete access control system, the key is the characteristics of the carrier.In currently in use is more, the characteristics of a magnetic card, photoelectric card, IC card, the second generation, etc.
control system must first to authenticate their characteristics of carrier, determine their legitimacy.Here is a method by giving them a sign of status and authority, this is the characteristics of the carrier, it contains the identity and authority is the characteristic of information.For mechanical lock, the key is a kind of feature vector, its & other;Tooth shape & throughout;Is the characteristics.From & other;Holder & throughout;The feature called & otherBiological characteristics & throughout;Holder, characteristic vector nature is.
2, identification equipment
identification equipment this should be well understood, simple said is used to read the exchange of feature vector devices.Mainly read identification and authorization information, determine the holders as to the identity of the legitimacy.
the carrier of different technical attributes corresponding identification device properties are also different.Take the card, it is recognition device magnetoelectricity conversion equipment, IC card reading device is electronic data communication device.And recognition of mechanical lock device is lock, key characteristics (carrier) into when the lock core, is through the key tooth shape and it fits the lock to determine identify the identity of the holder and permissions.Electronic identification equipment will be the feature information into electronic data, comparing with the data in the memory to identify and determine the identity of the holder and permissions.
3, locking mechanism
identification device to determine the identity of the newcomers and permissions, locking mechanism is controlling access to the next.Take the mechanical lock, as the key and lock, can turn the handle and recover the lock tongue, open the door;If don’t match, you refused to open the door of the request.
of course, different entrance guard system has different forms of locking mechanism, different access control technology.Like the charge system of pull rod, ATM printing device, parking lot stopper are more common in our daily life or lock.