How does an automatic swing door sensor work?
Automatic swing doors have become increasingly common in modern buildings. These doors are equipped with sensors that can detect the presence of people and open and close the doors automatically. One of the most critical components of an automatic swing door is the door sensor. In this article, we will explore how an automatic swing door sensor works.
An automatic swing door sensor typically consists of two parts: a motion sensor and a control unit. The motion sensor is responsible for detecting the presence of people or objects in the vicinity of the door, while the control unit processes the signals from the motion sensor and controls the opening and closing of the door.
The motion sensor can be of different types, including infrared sensors, microwave sensors, and ultrasonic sensors. Infrared sensors work by detecting the heat signature of a person or object in front of the door. Microwave sensors emit low-power microwaves that bounce off objects in their range, and the control unit detects changes in the frequency of the microwaves to determine the presence of people or objects. Ultrasonic sensors work similarly to microwave sensors, but they use sound waves instead of microwaves.
Once the motion sensor detects the presence of a person or object, it sends a signal to the control unit. The control unit then activates the door motor, which opens or closes the door depending on the signal received from the motion sensor.
The control unit also includes several safety features to prevent the door from accidentally hitting someone or something. For example, the control unit may include an obstruction sensor that detects objects in the path of the door and stops the door from closing. The control unit may also have a delay feature that keeps the door open for a certain period to allow people to pass through safely.
In addition to motion sensors and control units, automatic swing door sensors may also include additional features, such as remote control and access control systems. Remote control systems allow the door to be opened and closed from a distance, while access control systems limit access to the door based on a person's credentials.
In conclusion, automatic swing door sensors work by using motion sensors to detect the presence of people or objects and control units to process the signals from the motion sensors and activate the door motor. These sensors are essential components of automatic swing doors, as they make it possible for the doors to open and close automatically, making them more convenient and accessible to everyone.
