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The application of iris recognition technology in prison security management

Author: huifan   Time: 2022-12-21

Prison is a place where prisoners are kept, and preventing prisoners from escaping is a particularly important task for prison management. In recent years, the national prison walls, prison buildings have been standardized transformation.
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One, the access control system overview
Access control system, also known as access management control system, is a new modern security management system. In recent years, with the development of induction card technology, biometric identification technology, access control system has developed by leaps and bounds, into a mature period, the emergence of induction card access control system, fingerprint access control system, iris access control system, facial recognition access control system, disorderly keyboard access control system and other technologies of the system, they are in security, convenience, ease of management and other aspects have their own specialties, access control system applications are also More and more extensive applications.
Two, the access control management of the prison personnel access channel
Prison gate is one of the key parts of the prison to prevent prisoners from escaping. Especially in 2009, there were two cases of prisoners escaping through the prison gates, causing prison management leaders and security companies to think deeply about the prison access control system.
(A) the special requirements of the prison access control system
Prison as a high-security special area, the door control and management is critical. In line with the concept of "lenient entry and exit", all access control are used to enter the door must be swiped without verification of the password, the door must be swiped (or by fingerprint, face recognition, iris, etc.) followed by verification before the door can be opened; at the same time, as all prisons have production business activities, outside the unit staff from time to time to enter and exit the prison, the access control system itself to management, record of the entry and exit of personnel from outside units; in the access control system after a power failure, all door locks must be manually closed and opened by police officers; anti-trailing function, that is, when the police go out in the normal way, such as trailing prisoners, access control can somehow prevent prisoners from escaping from the access control.
(B) the implementation of the prison gate access control system program
1, the design of the access control structure
Single door A/B door access control system
Usually regulatory agencies (prisons, detention centers, etc.) are using a single AB door management model. The system realizes the double-door linkage interlock function, radio frequency identification technology, fingerprint recognition, face recognition combined with the way to control personnel access functions, and the production of a buffer area on the outside of the B door. The access control system to achieve the way: into the supervisory area, brush the card to open the A door, access control area, when the door A closed by access control personnel to open the B door, access to the internal area. Out of the supervisory area, swipe the card by the B door into the access control area after verification by the access control center, that is, by the explosion-proof glass after the duty officer or by the control center to view the monitoring video of the personnel whether to meet the permission to go out, such as the permission to open the A door, this is the entire process into the door.
The advantages of the single access control system is: simple structure, convenient construction; disadvantage is that when a large number of people enter and exit at the same time is not very convenient, may produce time delays, while there is also the possibility of misrelease. For example, when an illegal person illegally obtains access cards from the B door into the access control area, at this time, if someone happens to enter from the A door, open the A door, the illegal person has a high probability of escape through the A door.
Dual-channel access control system
In order to make up for the defects of the single A / B door access control system, combined with the needs of the actual application of the prison, the design of dual-channel access control system. Entrance channel is mainly composed of door A1 and door B1; exit channel consists of door B2, C1, A2, C2. In / out of the channel is separated by a high-strength metal railing, not only to achieve the effect of being able to see through, but also to prevent people from crossing. In the daily work, there are not only prison staff entering and leaving the prison, but also outsiders who work for the prison temporarily. For security and convenience reasons, the two types of people use different entry and exit patterns. Prison personnel's identity information, photo information, iris information pre-recorded in the computer host access control system, into and out of the door to compare personal information. Outside the door before the temporary registration of identity information, and led by prison personnel to enter and exit.
The following details the workflow of the dual-channel access control system.
There are four cameras in the access control system, which functions as a 24-hour video recording throughout the day. When an accident occurs, you can view the video to confirm the process when the accident occurs. In the entry channel, door A1 and door B1 are interlocked, and only one of the doors can be opened at the same time. At door A1 is equipped with a radio frequency card reader and a capture camera. Prison staff can enter the entry channel by swiping their own cards. Outside personnel must first follow the prison workflow, register their identity information and receive the RF card. Swipe the card before entering A1, the photo camera to take pictures, photos and card information together into the access control system. At the same time, the information of the police officer who leads the foreigners is also registered in the information of the foreigners. To ensure security, the opening of door B1 is manually controlled by the control room. To enter the prison, people must also swipe their cards at Gate B1 to confirm their entry in the access control system.
The card reader at the buffer door registers all the prison's access cards, i.e. the access cards of the prison administration staff and also the access cards of the people who enter the prison temporarily. The cardholder swipes the card to open the door and automatically locks it after passing through. It is not networked with the two-channel access control system, mainly to play a simple buffer role. But its closure can be controlled by the control room. When an unexpected accident occurs must close the access control or in the entire period of time the access control is closed, close the buffer door, at this time any card can not open the door.
Doors B2, C1, A2, C2 make up the doorway. Cardholders swipe their cards at door B2 to enter the door and wait for the identity check at door C1. The identity confirmation room is a space that allows only a single person to pause. Door A2 and door C1 are released first and then opened in a logical relationship. That is, when someone is in the identity confirmation room, both doors are closed. If the identity confirmation is legal then door A2 is opened and the person passes through door A2, and after door A2 is automatically locked, door C1 opens and waits for the person to enter the identity confirmation room. Once a person pulls open door C1 to enter, door C1 automatically locks. There is an iris recognition camera and a capture camera in front of the explosion-proof glass window of the identity confirmation room. When the prison staff for identity confirmation, first brush the card, the computer host of the access control system automatically call out its identity information and iris information, and then the prison staff eyes look directly at the iris camera, after a successful photo, the iris image automatically compared with the iris information in the computer, a successful comparison prompted the correct identity, otherwise prompted the wrong identity. When the identity is correct, the access control personnel open door A2 manually and allow the personnel to pass through door A2; otherwise, the emergency plan is executed according to the prison. When the identity of foreign personnel to confirm, first swipe the card, the computer host of the access control system automatically call out its entry at the door A1 photo picture and lead its entry prison staff information, and then foreign personnel look at the capture camera to take pictures of them, after a successful photo access control personnel will compare the two photos, while asking the prison staff has led him, if the information is correct, then allowed to pass, otherwise in accordance with the Emergency program processing. After the passage of foreign personnel, the information passed will be retained in the computer for a period of time for information inquiries. The last door C2 of the exit channel is also opened by the access control personnel. It is used as a safety door for door A2. Once if an illegal person does not pass the identity confirmation and force through door A2, there is also door C2 as a block, delaying its passage time. At the same time, A2 and C2 also have interlocking function to ensure that only one of the doors can be open at the same time.
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2, the power supply configuration of the access control system
Prisons are generally dual power supply system, usually no power outages. However, in order to ensure 24-hour power supply, as well as the occurrence of accidents, access control systems must use UPS uninterruptible power supply and emergency power generation system. Newly installed UPS power supply system needs to ensure that 24 hours after a power outage can guarantee the power supply of the access control system, so as to ensure that several years can be used without replacing the battery.
3, access control system lock configuration
At present, the electric control of the lock is mainly by the electric lock, electric plug lock and electromagnetic lock. Temperature changes can affect the deformation of metal doors, thus affecting the positioning of the Yin and Yang locks. Since the electromagnetic lock has a certain amount of activity margin, so a small amount of door deformation will not affect its normal use. At the same time, the electromagnetic lock has fewer accessories and therefore fewer failures. The installation of the lock should take into account the anti-pry, but also to consider the force of the door to prevent long-term use of the deformation. Therefore, the electromagnetic lock to conceal the way, and installation position in the ground about 1.4 meters. This position is the general position of people pushing the door, and thus just the lock to eat the force, will not cause the door deformation.
Prison night 22: 00 to 6: 00 in the morning, is generally prohibited from entering and leaving. At this time the management of the access control can rest. In order to prevent accidental power failure and other times, the door A1, B1, B2, C2 is equipped with anti-theft locks, to manually lock the lock with a key, while the four doors to the prison yard door side can not be left with a lock hole.
Fourth, the vehicle access control management
Prison gate is divided into two channels, namely, personnel access channel and vehicle access channel, the following describes the structure and management of vehicle access channel. Tire breaker is facing the yard for defense, that is, to prevent prisoners from hijacking vehicles to force the gate to escape. Normally, the tire breaker should be in the open state, when the normal vehicle needs to pass through the electric gate A, close the tire breaker and open the electric gate A at the same time; when the vehicle passes through the gate A is closed and the tire breaker is opened at the same time. The two electric gates should have interlocking function, that is, the two gates cannot be opened at the same time. At the same time, the gate should have a locking device, that is, when the door is not powered on, the gate can not slide freely, to the extent that human beings can not push the gate. When the vehicle passes through the gate, it must pass the inspection of the dedicated personnel, so that no prohibited items can be brought into the prison, and more importantly, no inmates can escape from the prison by hiding in the vehicle. Therefore, there are usually underground cameras to assist in the inspection. Before the inspection in order to make the vehicle chassis just through the camera, to direct the vehicle to travel or require it to follow the road signs to drive, stop.
V. Conclusion
The structure of the prison gate, functional settings, management of the three parties together affect its security. This paper mainly introduces the concept of access control, technology, and examples of the prison gate personnel access and vehicle access to the structure and general workflow. In the country's prison system, the construction of the personnel channel is affected by the specific prison leadership ideas, but also by the security integration unit product program recommendations. Thus, the structure of the personnel channel and the use of access control products are not the same.