Remote monitoring status

1. Remote monitoring system function

At present, there are two types of remote monitoring systems. One is that there is no on-site monitoring system at the production site, but the data is collected and sent directly to a remote computer for processing. This remote monitoring is not much different from general on-site monitoring, just data transmission The distance is farther than the on-site monitoring system, and the other parts are the same as the on-site monitoring system; the other is the coexistence of on-site monitoring and remote monitoring. Generally, fieldbus technology is used to connect the sensors, monitoring equipment, etc. distributed in each device, thus entering the integrated unit stage from the discrete unit stage, and then the services of each management site are connected by the local area network, thus forming the internal enterprise Network (Intranet). Due to the establishment of a basic network information infrastructure, equipment monitoring and maintenance technology has entered the integrated system stage, and resources and information sharing are basically realized within a unit.

The functions realized by remote control are as follows:

Collection and processing functions: mainly to detect, sample and necessary pre-process various analog or digital quantities in the production process, and output in certain forms, such as printing reports, display screens, and televisions, to provide production personnel with detailed information Data to help them analyze in order to understand the production situation;

Supervision function: the detected real-time data, as well as the instructions and input data issued by the production personnel during the production process, are analyzed, summarized, sorted, calculated and other secondary processing, and stored as real-time data and historical data respectively;

Management function: use existing valid data, images, reports, etc. to analyze working conditions, diagnose faults, and predict dangerous situations, and alarm faults and emergencies in the form of sound and light;

Control function: Information processing is carried out on the basis of detection, and control output is formed according to the control strategy decided in advance, which directly acts on the production process.

The remote monitoring system based on B/S and C/S is a monitoring system that uses the network as a communication platform, based on HTTP technology, has the advantages of simplicity and efficiency, and has become one of the most commonly used information interaction platforms for information networks[2].Using network communication technology Socket technology, data acquisition technology and object-oriented software technology to realize the system management, user management, equipment monitoring data display and alarm modules of the entire system. Its advantage is that it makes full use of the existing local area network resources and wide area network. Resources, with the highest cost-performance ratio, centered on real-time acquisition and real-time control of information, to realize the comprehensive sharing of information, resources and tasks and the overall management of integration. For example: the monitoring system provides the server with the operating status of the equipment, and the server sends it to the clients of each node. The staff can understand the working status and operating status of the entire system on the client side (usually remote). Simply put, for enterprises, it is to make full use of modern technology to solve the problems of real-time data collection, transmission and processing, and real-time control. It is these advantages that enable it to develop rapidly.

With the continuous development of network technology, remote monitoring will be more used in the management of the production process of enterprises. Professional and technical personnel can manage and maintain the production process through the Internet, optimize the production process, increase the availability of equipment, and ultimately reduce production costs. ,Improve efficiency.

2. The advantages of the remote monitoring system

With the help of remote monitoring, the internal information network (Intranet) of the enterprise can be effectively connected with the control network, realizing the control of production and operation conditions at any time, and closely combining the production and operation conditions with the company’s management strategy, thereby realizing the integration of the enterprise Automation can establish network-wide monitoring data and online knowledge resource database. Through remote monitoring, real-time collection and rapid concentration of on-site operating data can be achieved, and on-site monitoring data can be obtained, which provides a material basis for remote fault diagnosis technology; through remote monitoring, technicians can monitor and control the production system without visiting the site or harsh environments. And the operating status and various parameters of the field equipment, so that the professionally trained personnel. virtual.In many monitoring locations, it is convenient to use the rich local software and hardware resources to perform advanced process control on remote objects to maintain the normal operation of the equipment, thereby reducing the number of staff on duty, and finally achieving remote unmanned or few people on duty. The purpose of downsizing and increasing efficiency[3].

At present, more and more enterprise groups are showing a cross-regional development trend, using network technology to realize remote monitoring, reducing production costs, increasing labor productivity, increasing the technological content of enterprise products, and enhancing the comprehensive competitiveness of enterprises. Has a very important meaning.

3. Technical problems existing in the remote monitoring system

With the rapid development of network technology and the expansion of monitoring scope, the monitoring system has transitioned from single-machine monitoring in the past to current network monitoring, but there are still some problems. First of all, the problem of insufficient network communication technology. Network communication technology is the most critical technology in remote monitoring technology. However, current network communication generally simply uses Socket technology, even FTP or Email, etc. These technologies are very important in terms of the amount of data transmitted, the flexibility of programming, and the security. The big shortcomings, especially for the data collection of multiple endpoints in the field, will greatly increase the complexity of programming and cannot meet the needs of remote monitoring technology for network communication; secondly, the coexistence of multiple structures in network communication. Most of the current remote monitoring system structures are relatively complex and distributed over long distances. There are also different local area networks, different platforms, and even the operating platforms and programming languages ​​in the same local area network may have different problems, which requires different integration networks. Platform, to achieve mutual communication, and these problems are difficult to solve using traditional methods.