How Does An Automatic Door Work?

There are many types of automatic doors (roll up, sliding, swinging). All have a signal input that, once activated, sends a signal to a control unit that will actuate the motor. The motor then turns how ever fast the control unit has been adjusted to make it turn. The motor will slow down when it either hits a limit switch (a mechanical switch that tells the control that it has been activated) or when the control tells the motor to slow or stop because it has a revolution counter (a counter on the motor that communicates how many turns the motor has made so the control can know where the door is) and it communicates with the control. This is commonly known as a micro processed system and it is what prevents a motor from making a door slam open or closed. There can be many ways to activate an automatic door (key switch, handicap push button, sensor, a reception desk type switch, or even a timer) There are also several different types of sensors, safety sensors, activation sensors, and inside of those two categories there are many more. Hope this helps :)

Automatic doors are powered open and closed either by electricity, spring, or both. There are several methods by which an automatic door is activated:

A sensor detects traffic is approaching. Sensors for automatic doors are generally:

A pressure sensor - e.g., a floor mat which reacts to the pressure of someone standing on it.

An infrared curtain or beam which shines invisible light onto sensors; if someone or something blocks the beam the door is triggered open.

A motion sensor which uses low-power microwave radar for the same effect.

A remote sensor (e.g. Based on infrared or radio waves) can be triggered by a portable remote control, or is installed inside a vehicle. These are popular for garage doors.

A switch is operated manually, perhaps after security checks. This can be a push button switch or a swipe card.

The act of pushing or pulling the door triggers the open and close cycle. These are also known as power-assisted doors.

Many types of automatic doors have a signal input that control system in door is necessary. By electricity automatic doorsare powerd open and closed .

Hi
there! This sounds like a funny questions, but I suppose that I can still try
to answer it! It works with a sensor. The latter detects motion as you get
close and that’s when it opens. It will close as soon as the sensor stops
detecting movements and so on. It’s pretty simple really!