The automatic door should theoretically be understood to be an extension of the concept of the door, which is the development and improvement of the function of the door according to human needs. The development of the automatic door industry has gradually matured. The automatic door refers to: a control unit that can recognize a person's approach to the door (or recognize some kind of entry authorization) as a door opening signal, open the door through the drive system, and automatically close the door after the person leaves A system that controls the opening and closing process. Automatic door began to be used on buildings after the twentieth century.
In the late 1920s, supermarkets in the United States opened and automatic doors began to be used. In 1930, the American Stan rate first introduced the world's first automatic gate (this historical record is recorded in the New York Times). By 1962, the electric type had begun to appear, and then with the construction of the city, the field of automatic door technology increased every year. At the beginning, it was difficult to control the speed of the motor with the power supply for the building. It had to perform oil and air pressure speed control. However, due to the low energy efficiency, the electrical control technology has matured with the development of electrical control technology. Electric automatic doors that directly control the motor are becoming mainstream.https://www.kth-automaticdoor.com/