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automatic door

- May 09, 2018 -

Basic Information about automatic door

Automatic door can be divided into: revolving door, curved door, sliding door, emergency evacuation sliding door and swing doors, folding doors, rapid doors, and other categories automatic doors began to use in the building, is in the 20th century years later.Late 20 s, the opening up of the super market in the United States, automatic doors began to be used.In 1930, the United States Stanley rate has grown two millimeters to launch the world's first automatic door (the historical records in the New York times).Later, the world's first automatic doors brand sodom in 1945 oil pressure type, air type automatic doors widely to the market, the new main entrance of the building began to use.Has begun to appear in 1962, electric type, with the construction of city, after the field of automatic door technology is increasing every year.At the beginning, with supply buildings with power supply for motor speed control is difficult, so we have to oil pressure, air compressor speed control, transformation but due to the energy efficiency is very low, but along with the technical development of electrical control, electric control technology has been mature now, direct control of motor electric type automatic door gradually become the mainstream.Such as: all kinds of used to recognize the special automatic door control, such as: sensing automatic doors (infrared sensor, microwave induction, touch-sensitive, pedal sensor), charge automatic door, etc.


Using the pedals, photoelectric effect such as beam powered by electricity, pneumatic or hydraulic system of automatic opening and closing door leaf.
The 1st century AD, the Greek Luo Jianzao automatically open to the gate device (figure 1) is the earliest use of pneumatic and hydraulic powered automatic doors.As shown, the altar ignition is making the air expansion, 1 water into 2, water is used to rotate the shaft 3, the weight of the door open.Altar fire extinguishing, the door will automatically shut down.There are three main kinds of methods of modern automatic doors (figure 2).
(1) the foot pedal: equipped with a pressure switch under the pedal.
(2) optical beam: near the door set beam transmitting device and photoelectric sensing device.
(3) button: by hand in a similar switch button makes the doors open.Automatic door to slide, hinge, or folding methods such as opening and closing doors.In order to guard against theft, it must be equipped with special equipment at the same time, such as family with automatic door will need to furnish bearer identification equipment or TV monitor, etc., strictly limited to family outside of the staff.Automatic doors in shopping malls, hotels, restaurants, airports, railway stations, Banks, etc has been widely used.

By a variety of signal control automatic opening and closing, and running devices, sensors and the floorboard of the door body parts.(induction telescopic door see outside the gate.


working principle

The principle of automatic door automatic doors the basic component of the basic working principle of automatic door automatic door machine, roughly the same, composed of the above, plus the door signal, can be configured to a simple set of automatic door system.Automatic door system configuration refers to the, according to the requirement and equipped with auxiliary control unit connected to the automatic door controller peripheral, such as open source, entrance guard system, safety devices, central control, etc.Must be used according to the structure of the characteristics.Through personnel composition, building automation system requirements, such as reasonable equipped with auxiliary control device.1, open the door signal
The automatic door open signal is contact signal, microwave radar and infrared sensor is commonly used two kinds of signal source:
Microwave radar is to respond to the object the displacement and reaction speed, suitable for walking speed normal personnel through places, its characteristic is once near the door of the staff don't want to go out and motionless, radar will no longer response, automatic doors will be closed, the door machine has certain protective effect.
Infrared sensor to reaction of objects exist, regardless of personnel mobile or not, as long as in the sensor scanning range, it will response from contact signal.Defect is infrared sensor response speed slower, applicable to have slow personnel in and out of place.

Now building automation sometimes put forward special requirements, such as using the phone a line control to open the door.To meet this requirement, as long as to ensure that the signals are passive contact signal.In some cases, people will ask for aerial remote control.With a wireless receiver with contacts connected with automatic doors, match again a wireless transmitter, can meet the requirements.Now, however, the radio waves is too much, easy to cause accident to open the door is a troublesome problem.

Timer can automatically control the state of the door, its principle is to put the clock with a particular switch circuit is linked together, can set a time beforehand will automatic door in a state of automatic open or lock the door when you leave.


3.Automatic door Unlocked
Automatic door unlock the coordination between the action and open action, applied to the automatic sliding door of electronic lock electromagnetic locks and lock the door have a lock on the belt body hang electric lock, lock motor of the three.The latter is used for heavy automatic sliding door, automatic flat open electronic lock has electromagnetic suction door, bolt locks and electronic door opener, direction of force does not affect the electronic door open action, wrong operation is not easy to happen.There is also a contact switch mechanical lock, lock and the switch, the lock is not in a state of the lock, contact will not be able to contact, could not have happened wrong operation.


4.Centralized control
The concept of centralized control, including centralized monitoring automatic running state and concentrated multiple automatic door operation two meanings, centralized monitoring automatic door to open the door closed state, can be done by position signal output circuit can be used in a contact switch, when the door to reach a certain position (such as open position), touch switch and contact signal is given.Also can use inductive signal generator, when the sensors detect the door in a certain position signal.Is set inside the corresponding indicator light, can display the condition of automatic doors, and centralized operation usually refers to will be more open or lock the door at the same time, it depends on the automatic door controller on the presence of the corresponding terminal.