Many people think that automatic doors and electric doors are the same thing, but they are actually different things. Theoretically, automatic doors should be an extension of the concept of doors, and the function of doors is developed and improved according to human needs. Automatic doors refer to: a control unit that can recognize the action of a person approaching the door (or a certain entry authorization) as a door opening signal, open the door through a drive system, and automatically close the door after the person leaves, and control the opening and closing process.
Automatic doors began to be used in buildings after the 20th century. In the late 1920s, with the opening of supermarkets in the United States, automatic doors began to be used. By 1962, electrical doors had begun to appear, and since then, with the construction of cities, the field of automatic door technology has been increasing every year. At first, it was difficult to control the speed of the motor using the power supply for the building, so oil pressure and air pressure speed control had to be used. However, due to the low energy utilization efficiency, with the development of electrical control technology