The door opening signal of the automatic door is a contact signal. Microwave radar sensor and infrared sensor are two common signal sources.
Microwave radar sensor responds to the displacement of objects, so it has a quick response and is suitable for places where people walking at normal speed. Its characteristic is that once people near the door do not want to go out and stand still, the radar will no longer respond, and the automatic door will close, which will protect the door machine to some extent.
The infrared sensor responds to the presence of an object. 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 infrared sensor has a slower response speed, which is suitable for places where people with slow movements enter and exit. In addition, if the automatic door accepts the contact signal for too long, the controller will consider the signal input system to be obstructed. And if the automatic sliding door is kept open for too long, it will also cause damage to electrical components.
