The basic principle of automatic induction door

Time：

2025/02/17

source:

The components of automatic induction doors are generally the same, and the working principle is: the main controller (it is the command center of the active induction door, just like the CPU in a computer, through the integrated block with internal instruction programs, it issues corresponding instructions to command the motor to work various components; adjust the door opening speed, opening fluctuation and other parameters during installation); induction detector (receives external signals through sensors such as radar or infrared. When a moving object enters its working range, it gives a pulse signal to the main controller to start the working process); power motor (that is, the drive motor. When the start signal is received, the motor starts to work and drives the door leaf to open and close. All power is provided by the motor).

The door opening signal of the active induction door mainly includes two commonly used signals: microwave radar and infrared sensor. Microwave radar responds to the displacement of objects, so it has a fast response speed and is suitable for places where people with normal walking speed pass by. Its characteristic is that once the people near the door do not want to go out and stand still, the radar will no longer respond, and the active door will close, which has a certain protective effect on the door machine; the infrared sensor responds to the existence of objects. Regardless of whether the person moves or not, as long as it is within the scanning range of the sensor, it will respond and send out a contact signal. The disadvantage is that the response speed of the infrared sensor is slow, which is suitable for places where slow-moving people enter and exit.

In addition, if the active induction door receives the contact signal for too long, the controller will think that the signal input system is blocked. And if the active induction door is kept open for too long, it will also cause damage to the electrical components. Because microwave radar and infrared sensors do not know whether the person approaching the automatic door really wants to enter the door, some occasions prefer to use key switches.

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