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abstract:
This paper expounds the application of intelligent technology in elevator control system, including intelligent control and smart grid, which can optimize the configuration of elevator system, improve the quality of fault diagnosis and improve the efficiency of line processing.
Key words:
Intelligent technology; System configuration; Fault diagnosis;
Introduction:
Elevator control system is an integral part of elevator transportation, which can effectively ensure the smooth, safe and effective operation of the elevator. The traditional control system in China mainly controls the elevator through relays. Although simple logic functions can be realized, there are many problems and shortcomings. Under the background of intelligent development of elevators, intelligent technology can be fully integrated into the control system, thus effectively improving the safety factor of elevators.
1, the basic structure and operation principle of the elevator
Elevator is a kind of conveying equipment that transports goods and people vertically. According to the running speed, it can be divided into three types: low-speed elevator, fast elevator and high-speed elevator. It is mainly composed of landing part, car part, pit part, shaft part and machine room part. Its operation system specifically includes traction system, guidance system, car system, door system, balance system, drag system, control system, protection system and so on. The basic function of the control system is to control and manipulate the elevator operation in real time, which is usually composed of floor selector, leveling device, control panel, display device, manipulation device and other equipment. In the process of elevator operation, passengers need to send command signals through buttons, and the control system calls the elevator for passengers. When the elevator is in the starting state, the car doors and hall doors of all floors will be in the closed state. If the close button in the elevator car is to realize the door closing task, the elevator control system needs to input signals to the deceleration control device and the acceleration control device respectively, so that the elevator can handle the door closing task according to the actual situation. After the elevator arrives at the designated floor, the elevator will judge whether the passengers leave the elevator according to the weight change in the elevator, then adjust the closing time of the elevator door, and then implement the quality issued by the elevator caller. The application technologies involved mainly include fingerprint identification, eyeball identification, security control, security protection, digital monitoring, alarm devices and other technologies.
2. Classification of intelligent technology in elevator control system
Smart grid. The power grid of elevator control system includes power distribution, electrical equipment configuration and system design. If there are problems in the power system, such as the lack of feedback mechanism, it will make it difficult for elevators to achieve the purpose of safe operation, and even seriously affect the safety of passengers. Various information and intelligent technologies have been applied in elevator engineering in China. Such as genetic algorithm, fuzzy algorithm and neural network method. Among them, the fuzzy algorithm is mainly based on fuzzy mathematics, and the fuzzy system of elevator control system platform is constructed with the help of membership and fuzzy set equations. The adaptive algorithm can adapt to a certain feature in the elevator by analyzing the space state or state space in the elevator control system, so that the feature can change during the operation of the elevator. Generally speaking, the combination of fuzzy algorithm and adaptive algorithm can form a fuzzy adaptive algorithm. Genetic algorithm can imitate the relationship between population variation and competition in ecological space, reduce its complexity through differential evolution, and make the process of data collection, mining and sorting more intelligent. Finally, neural network, which can simulate human neurons to build a multi-layer neural network system, makes the data analysis process more flexible and intelligent. In elevator troubleshooting, the control system can quickly analyze the fault types by inputting fault data, and improve the stability of the elevator.
Intelligent control. Intelligent control is the second kind of intelligent technology in elevator control system. It mainly includes "processing unit" and "system application". The first is the processing unit. Processing unit mainly refers to the hardware of intelligent algorithm, that is, "system on chip". In the application of intelligent algorithm, the program needs to occupy a lot of CPU memory and run for a long time. If the algorithm is hardware-based, it will improve the utilization rate of CPU, optimize the running speed and time of the system, reduce the power consumption of the system to a certain extent, and improve the effectiveness and effect of the system operation. At present, there are two kinds of intelligent units used in elevator control system in China: hardware unit and software unit. Software unit mainly refers to the packaging of fixed flow and algorithm software, which requires technicians to set access interfaces so that developers can make corresponding calls. At the level of software unit, software unit needs technicians to set corresponding electrical interfaces, such as bus interface and power interface. However, according to relevant research, the application of intelligent unit is relatively low, which needs to attract the attention of relevant domestic scholars and experts. Followed by the operating system. Operating system can lay the foundation for elevator processor or CPU to "parallel process" various tasks, and can make PC pointer and processor "freely switch" in various tasks. Generally speaking, the operating systems used in industrial fields mainly include Linux, Windows, Frertos, Ucos and so on. But both Linux and Windows are relatively large, so it is difficult to use them in elevator operating system. Ucos, Frertos and other systems can be embedded into single-chip computers and processors with simple procedures and small size to improve the intelligent level of elevator control system. At present, the elevator control system in China is mainly based on logic control, and some elevator systems can integrate simple computer operating systems, such as ucos system. After the elevator control system is equipped with this control system, it can help developers improve the convenience of human-computer interaction and the effectiveness of task processing. With the rapid development of science and technology in the future, more operating systems will be widely used in elevator control systems.
3. The application of intelligent technology in elevator control system.
After fully discussing the types of intelligent technology in elevator control system, we can initially understand the application direction and ways of intelligent technology. Smart grid, for example, is based on the intelligence of power system, which effectively reduces the probability of elevator failure by integrating fault diagnosis system, power optimization system and fault adaptability. Intelligent control mainly starts with control unit and control system to improve the intelligent level of elevator control system. However, in the specific application of intelligent technology, we need to proceed from the following angles.
Energy saving and environmental protection technology.
(1) elevator in small machine room. Because the vertical shaft area and cross section of the small computer room are the same, it is usually half of that of the traditional computer room. Through permanent magnet synchronous traction machine and drive control technology, the building area of the machine room can be reduced.
(2) With the support of intelligent technologies such as neural network, fuzzy logic and expert system, elevator control system can reduce elevator running time and energy consumption by controlling output power.
(3) With the support of variable voltage drive control and synchronous traction machine, the elevator car fan and electric light can automatically stop and go out, which can effectively reduce the electric energy consumed by elevator operation. For example, when the control box and elevator landing are difficult to provide related services for passengers, the internal lights will automatically go out.
(4) With the support of neural network technology, the elevator can automatically adjust its running power according to the running time, load weight and the number of passengers, that is, in the peak period of heavy load or elevator ride, the elevator will automatically increase its output power to meet the needs of passengers as much as possible, while when the load is small, the elevator will reduce its running speed and output power.
Digital elevator technology. In the process of the rapid development of modern science and technology, the elevator control system can develop the traditional digital circuit into an analog circuit, and optimize the elevator operation process by replacing the hardware drive with software drive to meet the basic needs of passengers.
(1) In the application of digital elevator technology, it is necessary to realize the function of multimedia data transmission, which can convert analog signals into digital signals and improve the quality of network data and telecom data transmission in elevator operation.
(2) R&D personnel need to use digital elevator technology to integrate various elevator technologies, so that the elevator control system can enrich the inherent functional system of the elevator under the premise of networking. Such as user face recognition function, security control function, digital monitoring function, remote alarm function, etc.
(3) R&D personnel should also use digital elevator technology to realize various intelligent service functions. Such as voice navigation, passenger guidance and intelligent publicity. Among them, intelligent publicity mainly refers to the publicity of targeted commercial promotion information through face recognition.
Fuzzy control technology. Fuzzy control technology can play an irreplaceable role in smart grid, improve the safety factor of elevator operation and the effectiveness of fault detection. In the process of elevator operation, fuzzy control technology can also play an outstanding advantage and role. Generally speaking, elevators are characterized by uncertainty and complexity during operation, and various unexpected situations and problems usually occur. In order to effectively improve the overall stability of elevator, researchers need to improve the basic performance of elevator operation through "autonomous learning" of fuzzy control technology. Elevator can avoid all kinds of interference factors and improve the quality of vertical operation. In the specific application process, R&D personnel also need to make the elevator control system have the functions of information collection, data analysis and intelligent processing. That is, by collecting all kinds of data generated during elevator operation, the problem type and operation adjustment direction are clearly defined. In addition, the elevator control system also needs to integrate various intelligent adjustment and automatic adjustment technologies, such as buffering, speed limit and emergency braking.
4. Conclusion
The full application of intelligent technology in elevator control system can effectively improve the intelligent level of elevator operation and enhance the safety and comfort of elevator operation. However, in the application of intelligent technology, it is necessary to start with the types of intelligent technology in elevator control system, and then explore the application direction and methods of intelligent technology from the level of elevator use and operation, in order to effectively play the application value of intelligent technology in elevator control system.
refer to
[1] Dong Li, Wang Wei, Shao Cheng. Intelligent elevator group control system and intelligent control technology [J]. Control and decision, 20065438+0 (05): 513-517.
[2] Han Yu. Hardware design and implementation of multi-line traction machine drive and controller [D]. Jiangsu, Nanjing University of Science and Technology, 20 19.
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