ALLEYBill Technology Innovation Forum Network Optimization of Yinshan Steel Air Compressor Station Li Pengcheng (Laigang Automation Department, Shandong Laiwu 271126) With the leap-forward development of Laiwu Steel, the required steel output is also rapidly increased, thus the reliability of production equipment operation. , accuracy, put forward higher requirements, improve the network reliability by increasing the reliability of the network to improve the production rhythm is the top priority of the development of the enterprise. In the face of fierce competition in the steel market, Laiwu Steel puts forward higher requirements for the network system. With the acceleration of the production rhythm and the continuous improvement of the automation level, the accuracy and stability of the network equipment are required to be higher, and the failure rate is lower. The air compressor station not only provides uninterrupted compressed air to the steel mill, but also provides compressed air for medium and wide H-beams. Therefore, the air compressor station is crucial for the smooth production of the entire production line. The stability of the air compressor network system is the key issue for the entire steelmaking process. The core of the problem is to improve and improve the air compressor network system, thus laying a solid foundation for the smooth, high-yield and low-cost production of the entire steelmaking.
The entire air compressor station consists of 10 air compressors, each of which is controlled by a single S7-200. 10 sets of S7-200 are divided into two stations to communicate with two sets of S7-400 through Profibus for remote monitoring and control. The network diagram is as follows: There are two main defects in this control method: the signal, and the large current generated when the press is started easily interferes with the DP line communication.
2) Environmental factors: The temperature of the press machine is high after running for a period of time, and the long-term high temperature environment of the DP line has a certain impact on communication.
In order to ensure the network reliability of the air compressor station to ensure the stable and smooth operation of the production, the company provides stable and reliable compressed air for the production of Laiwu Steel. Based on the in-depth study and analysis of the existing problems, the following corresponding countermeasures are formulated: 1) DP The communication method was changed to a more reliable Ethernet communication method. The five air compressors are divided into two separate stations. The two stations are controlled by two sets of S7-400. One of the stations can continue to work after another station fails. The optimized network is as follows: To this end, the 0LM communication device is added to change the DP communication to Ethernet communication, which replaces the old DP communication device, which greatly increases the reliability and stability of the system.
2) According to the current situation that the field equipment is easily affected by high temperature, the special high temperature resistant twisted pair cable, and the protection measures such as asbestos insulation board are added to the cable and control equipment, so that the temperature is controlled within the range that the equipment can withstand.
After the optimization plan is determined, the implementation of the plan begins.
The difficulty in the implementation of this project lies in the communication and networking of the PLC system.
The communication of the PLC system refers to the communication between two PLC systems, between the PLC system and the HMI industrial computer, and between the PLC system and other devices. The PLC control system can be combined with the industrial computer, other PLC systems or other only devices through the communication processing equipment to form a network to realize the mutual exchange of information, thus forming a distributed control system of "centralized management, decentralized control".
The PLC control system we used in this project is the SIMATICNS7400 system of Siemens. It has built-in powerful and well-built built-in function blocks, which can support MPI communication, PR0FIBUS communication and industrial Ethernet communication, and has comprehensive error diagnosis function; A variety of function templates are used to implement various required functions. The CPU has fast instruction processing capability. The internal integrated high-speed interrupt processing capability can greatly shorten the cycle time of the control program and shorten the response time of process events. Network communication equipment is an important and key component of this system, which gives the system a strong industrial communication capability, which can be easily and quickly realized between PLC systems, between PLC and industrial computer, and between PLC system and other intelligent devices. Networked communication.
The communication function of the SIMATICNS7400 system from Siemens is a new thing for us. We have never been exposed to this content, and we have passed the quality of the technology innovation forum through the blitz (down to page 182).
4.2 Do a good job of processing information In the hospital, there is a large amount of information to be processed. This information is mainly for the careful storage and processing of patients. In order to better establish an information processing system, the information is mainly collected by the hospital's e-government personnel. And processing, e-government personnel use the computer to check the patient's basic information, and check the patient's case.
4.3 Management of Drugs in Hospitals One of the most important aspects of drug management in hospital management is the management of drugs, the collection of drugs, the price of drugs, and the effective control. The drug management mainly uses microcomputers. management.
4.4 Handling the function of the information system The hospital must have a certain technical content for the information processing. It is necessary to grasp the overall information design concept and design structure of the hospital. It is necessary to establish an overall framework for information processing. The hospital should provide support and help.
5 Factors affecting hospital information construction The factors affecting hospital information construction mainly include the following: The overall construction idea of ​​the hospital is closely related to the influence of the hospital director. The hospital director should implement the responsibility to each employee of the hospital. In order to realize the informatization construction of the hospital, we must start from the most basic places. In today's society, the continuous innovation and optimization of science and technology, the hospital's application equipment should be the most advanced, to keep up with the trend of social development. Thereby strengthening the management of the hospital itself.
5.2 Using e-government to manage hospitals E-government is a necessary means for government departments to facilitate the processing of information conveniently, quickly and simply. As a hospital, it is necessary to link e-government with the overall thinking of the hospital and find out the backward technologies. To improve the hospital's medical facilities, to provide patients with a comfortable and warm treatment environment.
5.3 Using advanced medical equipment China's technology is constantly being optimized and updated. With the development of the medical industry, some technologies are continuously injected into medical equipment. E-government has begun to play its role in the management of hospitals. It can help hospitals become more scientific. More reasonable management of hospital information, through network technology, to ensure the quality and safety of hospital drugs.
6 The important role of e-government in hospital management The important role of e-government in hospital management is to summarize the following aspects: 1) It is conducive to strengthening the management of various departments of the hospital.
2) It can improve the transparency of hospital management and form an interactive platform.
3) Conducive to the rapid dissemination of information and improve the overall level of hospital public services.
4) The implementation of e-government work is conducive to supervising the work of various departments of the hospital.
5) It is conducive to simplifying the operational procedures and links of the administrative department and improving the efficiency of the work.
7 Summary With the continuous transformation of China's government functions and the continuous improvement of medical facilities, China's medical industry has begun to develop rapidly, and e-government has played an important role in the management of hospitals. Through this article, we can have a certain understanding of the meaning of hospital e-government, but also have some characteristics, we all know that the work in the hospital is complex, the operating system of e-government in hospital management, related to the hospital The overall management effect, there are many departments in the hospital, each department has its duties and division of labor, in the process of work, the information processing of the hospital will inevitably encounter some problems, the hospital health care staff's service attitude is not good, not careful Taking care of patients, when using e-government to work, their professional skills are relatively weak, which requires the hospital to set up an e-government special training course, so that all employees of the hospital know the substantive role that e-government should play in hospital management. . Therefore, in daily work, hospital medical staff should use e-government to collect modern information, promote e-government through hospitals, to achieve the efficiency of hospital administration, and strengthen information construction is the most critical factor to improve hospital management.
At the same time, the hospital has experienced many problems in the process of using e-government. The main reason is that the hospital's ideological concept is relatively old, but it is only from the conceptual level, but it does not see the essence of the problem through the phenomenon.
DNDT series industrial online inspection radiography system usually applies with leading C-arm structure, it always transmits workpiece into lead room by table roller, and also can connects with workpiece production line to be flow inspection, with cooperation between X-ray and industrial TV, users can view real time inspection images directly, which can easier judge appearance and type of failure, then finish saving and processing for the picture to improve its definition.
As most important part of radiography system-image intensifier/flat panel detector, we applies with products which manufactures by famous France Thales/Pelkinelmer, varian company, it not only has advantages of high resolution and low noise, but also with characteristic of big dynamic range which can offer reliable image information for users.
Electrical controlling unit is an intelligent controlling system which with core of PLC, it matches with servo driver and rotation coder which can finish relative inspection procedure and collects images by manual/ semi-auto modes after diameter alignment of different workpiece models.
Online Inspection System
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