Functions:
- Interlocking control: It ensures that
only one door can be opened at a time. For example, in an airlock chamber, when
the outer door is opened, the inner door is automatically locked and can only
be opened after the outer door is closed.
- Status indication: It is equipped with
indicator lights to show the opening and closing status of each door in real
time. Usually, green indicates normal or unlocked status, and red indicates
locked or abnormal status.
- Safety protection: It has functions such
as anti-theft and anti-intrusion. It can also be equipped with an alarm device
to send out an alarm signal when an unauthorized opening attempt or other
abnormal situation occurs.
- Emergency unlocking: In case of an
emergency, it can be forced to unlock through an emergency button or other
emergency unlocking methods to ensure the safety evacuation of personnel.
Working principle:
- Signal sensing: Sensors such as door
magnetic switches and proximity sensors are used to detect the opening and
closing status of the door and send the signal to the controller.
- Logic control: The controller judges
according to the received signal and the pre-set logic rules. For example, if
one door is opened, it will send a lock signal to other doors to realize the
interlocking function.
- Power drive: The controller controls the
opening and closing of the door lock through a power drive module, such as
controlling the electromagnet of the magnetic lock or the motor of the electric
lock to achieve the locking and unlocking of the door.
Applications:
- Banks and prisons: Strictly control the
entry and exit of personnel to prevent unauthorized entry and ensure the safety
of the site.
- Clean workshops: Such as in
pharmaceutical and food processing plants, it prevents air convection and
cross-contamination between different clean areas and ensures the cleanliness
of the production environment.
- Hospitals: It is used in special areas
such as operating rooms and isolation wards to control the flow of people and
prevent the spread of germs.
- Offices and public buildings: It is used in
some important areas to enhance security management and control the access of
personnel.
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