1
The passage adopts dual-interlocked Door A and Door B. One door can only open when both doors are fully closed. They are single-opening stainless steel doors. Entry is via waterproof IC card readers.
2
Two pedestrian turnstiles are installed in the buffer passage between Door A and Door B. To enter the prison: Swipe IC card outside Door A for verification by on-duty security staff. Officers check card validity through the system and confirm the person via surveillance video. After entering the buffer zone through Door A, facial data will be captured by the facial recognition system (skipped if already registered). Then swipe card to pass the turnstile and finally go through Door B.
3
To exit the prison: Door B unlocks automatically after successful facial recognition. Swipe card to pass Door B into the buffer zone, then swipe card at Door A. Security staff will open Door A after confirmation. The system triggers an alarm if facial matching fails, more than one person enters the buffer area, or an invalid card is used during exit.
4
A set of correlated infrared sensors is installed between the exit-side turnstile and Door B. If personnel pass Door B without facial verification or tailgating occurs, the sensor activates an audible and visual alarm and locks all doors and turnstiles. The system can only be reset by on-duty security officers.
5
Door B unlocks upon successful facial recognition. In case of forced entry or emergencies, authorized personnel can press the emergency button beside the facial recognition terminal. This locks all doors and turnstiles immediately. Normal operation resumes after security handling.
6
Cameras are fitted at the entry and exit sides of Door A and Door B. Optional infrared human detection cameras can automatically count people in the monitored area.
7
Red & green status indicators are installed at the outer, inner and card-swiping areas of Door A and Door B. Green light grants access only with valid card, security approval and the opposite door fully closed. Red light shows for invalid/expired cards or an incompletely closed opposite door.
8
An infrared presence detector is mounted outside each door. The system alarms if someone lingers beyond the configurable time. Detectors connect to the access controller or I/O board to prevent inmates from damaging access control devices.
