博文

目前显示的是 二月, 2022的博文

Working Principle of Automatic Door Sensor

Automatic door sensors are sensors that belong to a kind  of control sensors. It realizes the automation of door switch through microwave and infrared induction. Mainly used for automatic doors, revolving doors, etc. Microwave sensor : Also known as microwave radar, it reacts to the movement of objects, so the reaction speed is fast. It is suitable for places where people with normal walking speed pass. Its characteristic is that once people near the door don't want to go out, it still is. It will not respond, the automatic door will close, and there may be squeezing.   Infrared sensor : Respond to the presence of objects, no matter whether the person is moving, as long as it is within the scanning range of the sensor, it will respond. The response speed of infrared sensors is slower than that of microwave sensors. Parameter     1. Installation height is less than 2.5 meters     2. Longitudinal detection range: full beam 12°-20°, sub-beam 3.5°-1.5° (5 segments)     3. Ambient temp