The basic composition of the automatic door machine is […]
The basic composition of the automatic door machine is roughly the same. With the above composition, plus the door opening signal, it can be configured into a simple automatic door system.
The automatic door system configuration refers to the peripheral auxiliary control devices connected to the automatic door controller, such as door opening signal source, access control system, safety device, centralized control, etc., equipped according to the requirements of use. Must be based on the characteristics of the building. Auxiliary control devices are reasonably equipped with personnel composition and building automation system requirements.
1. Door opening signal
The door opening signal of an automatic door is a contact signal, and microwave radar and infrared sensors are two commonly used signal sources:
Microwave radar responds to the displacement of objects, so it has a fast response speed. It is suitable for places where people with normal walking speed pass. Its characteristic is that once people near the door do not want to go out and stand still, the radar will no longer respond and automatically The door will be closed, which has a certain protective effect on the door machine; the infrared sensor reacts to the existence of the object, no matter whether the person moves or not, as long as it is within the scanning range of the sensor, it will respond and send out a contact signal. The disadvantage is that the infrared sensor has a slow response speed, which is suitable for places where people with slow movements enter and exit. In addition, if the automatic door receives the contact signal for too long, the controller will consider the signal input system to be obstructed. Moreover, if the automatic sliding door is kept open for too long, it will cause damage to the electrical components. Because microwave radars and infrared sensors do not know whether people approaching automatic doors really want to enter, they are more willing to use key switches in some situations. The key switch can be a contact type button, and more convenient is the so-called toggle switch. The elbow switch is very durable, especially it can be operated with an elbow. Avoid hand contact. There is also a foot switch, which has the same function, but has higher requirements for waterproofing, and the power of the foot pedal is very large, which is easy to make the foot switch invalid. There is also a handle with a contact switch. When the handle is pushed (or pulled in the opposite direction) into place, it provides a contact signal to the door machine. The current building automation sometimes puts forward special requirements, such as using a certain branch of the telephone to control the door. To meet this requirement, as long as the signal is a passive contact signal. In some cases, people will request antenna remote control. Use a wireless receiver to make a contact connection with the automatic door, and a wireless transmitter can meet the requirements. However, there are too many radio wave sources now, which can easily lead to accidental opening of the door is a troublesome problem. The timer can automatically control the state of the door. The principle is to connect the clock to a specific switch circuit, and the automatic door can be automatically opened or locked for a preset time.
2. Access control system and automatic doors in non-public areas
If the highest requirements for the performance and quality of automatic doors are in large public areas with extremely high frequency of use, then the highest functional requirements for automatic doors are non-public areas where people enter and exit. The access control system is the identification of entry authorization. After identifying or detecting the entry authorization, provide the door opening signal to the automatic door control system. Before providing the door open signal, the automatic door must be locked. The access control system includes the simplest key switch, password lock, magnetic card lock. (Attendance Statistics System). All the way to the complex weight recognition system, fingerprint recognition system, etc. But no matter how complicated the system is, it will ultimately provide the automatic door with a contact signal to open the door. The shielding of the signal circuit is very important to avoid accidental opening of the door due to interference from irrelevant signals.
3. The requirement for automatic doors is the coordination between unlocking and opening.
Electronic locks applied to automatic sliding doors include electromagnetic locks for locking belts, electric locks for locking door hangers, and three types of lock motors. The latter is used for heavy-duty automatic sliding doors. The electronic locks for automatic swing doors include electromagnetic door stoppers, electronic bolt locks and electronic door openers. The force direction of the electronic door opening does not affect the opening action of the door, and it is not easy to misoperation. There is also a mechanical lock with a contact switch, which combines the lock with the switch. If the lock is not in the unlocked state, the contacts cannot be contacted, and misoperation is impossible.
4. Centralized control
The concept of centralized control includes two meanings: centralized monitoring of automatic door operation status and centralized operation of multiple automatic doors. Centralized monitoring of automatic door opening and closing status can be realized by position signal output circuit, and contact switch can be used when the door reaches a certain position (Such as open position), touch the switch to give a contact signal. An inductive signal generating device can also be used to send out a signal when the sensor detects that the door is in a certain position. Set the corresponding indicator light in the central control room to display the status of the automatic door, and centralized operation usually refers to opening or locking multiple doors at the same time, depending on whether there are corresponding wiring terminals on the automatic door controller