Automatic Sensor Doors - Works
Automatic
Sensor Doors are one of the best modern inventions. All we have to do is
walk up to the door and it opens magically for us. An automatic sensor door is
a closing or opening structure that is used to limit access to an entrance hall
through the use of automated technology.
The
primary purpose of automatic doors is to allow for objects to pass through an
area. Though, they are also used to control the physical atmosphere, such as
blocking wind from entering the building, or acting as a noise barrier. Some
automatic sensor doors have locking mechanisms that automatically open the door
when a card is scanned or by scanning a fingerprint. Automatic doors can typically
be found in many shopping malls and office buildings.
Types of Sensor
1. Pressure Sensor: Automatic
doors that use a pressure sensor have a huge area that is placed in front and
behind the building. The huge area acts as a weighing scale. If the weight
exceeds the weight boundary that is set, then the door will open. Pressure
sensors can also be used as a secondary sensor. If the primary sensor were to
fail, then the pressure sensor will activate. If the pressure sensor detects
while closing there is some sort of resistance, the door will avoid closing on
that object.
2. Infra Red Sensor: Infrared
sensors use infrared technology to open automatic doors. The infrared sensors
are able to identify a change in temperature. When the sensors detect a
temperature that is warmer, representing a human, it will activate the opening
and closing mechanism of the door.
3. Motion Detector:
This detector does not use any technology in it. These sensors generate vibration
of ultrasonic waves or microwave energy to detect an object in the way. Other
ways is, the ultrasonic waves and microwaves will bounce off object.
An automatic
sensor doors cannot be controlled by the people passing through, because it
may injured or harmed if the sensor fails. So to prevent this sensor are
installed to detect if there is object in between the doors.
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