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Petroleum and petrochemical companies play an important role in the national economy and the local economy where they are located. It has become one of the important tasks of petrochemical companies to ensure the normal operation of related equipment in various links such as oil extraction, oil and gas transportation, production refining, and petrochemicals. Sinopec has realized the platform-based transformation of the industrial monitoring system of its refining and chemical enterprises, and has built one of the largest and most regionally networked monitoring systems in China. It has successfully implemented video monitoring systems for various sectors of refining, sales, pipelines, and oil fields. Integration.
Application background
Petroleum and petrochemical video surveillance applications are divided into two parts, one is the industrial TV system, which is mainly used in the production process; the Other is the integrated security system, which is mainly used for park security monitoring. In the past, not only the industrial TV system and the security monitoring system were independent of each other, but even the production monitoring systems used in various factories were not connected to each other. It can be said that "closed" and "exclusive" are the characteristics of these systems. With the continuous improvement of enterprises' comprehensive management of production, life and other aspects, especially the emergence of production scheduling and emergency system construction needs, it has become more and more integrated and networked to integrate the original industrial TV and security monitoring system. Coming more and more urgent.
Sinopec’s 27 oil refining companies, 27 chemical companies, as well as a number of oilfields and sales companies have more than 400 industrial TV systems, which are mainly divided into matrix (including some matrix systems with network hard disk video recorders) and hard disk video recorders. (Including some network hard disk video recorders), video tape recorders, video servers, simple analog systems (including traditional systems such as screen splitters) and other different types. Although each subsidiary company has set up a complete local area network, the current industrial TV of the enterprise is mainly based on the traditional analog system, and has the following characteristics:
· Enterprises have many monitoring information points, complex systems, many types of equipment, and inconsistent structures;
· Industrial TV has been used in petrochemical companies for a long time, and the systems of each company basically coexist with traditional systems and advanced digital systems;
· The equipment suppliers used by some enterprises have been restructured or their products transformed, and are currently unable to provide relevant and complete services;
· Some companies have added digital network video surveillance systems, but due to the wide variety, lack of industry standards, poor interconnection, and uneven product quality;
· The export bandwidth of each enterprise and headquarters network platform is only 2Mbps, and there are a large number of information systems and application systems running on this platform, which cannot meet a large amount of video information transmission.
System architecture transformation solution
The reconstruction of the system architecture mainly focuses on the access reconstruction. The current status of the industrial TV system of comprehensive refining and chemical enterprises includes mainstream DVR systems, older PC-DVR systems, and some analog matrix systems. Comprehensive analysis provides two access transformation schemes: one is pure hardware access transformation, and the other is pure software access transformation. The two technical methods have their own characteristics, combined with the characteristics of the industrial television subsystem of the refining dispatch and command system of each enterprise, and finally selected a comprehensive plan, combined with the current situation of 27 enterprises to choose a targeted access method to ensure data security, feasible expansion, and advanced systems.
Hardware access transformation is a transformation method with the lowest technical difficulty. It is based on the reservation of all the original systems, and completely encodes and transmits all front-end video resources in a 1:1 non-convergence manner. Since this method does not make any changes and docking to the original system, and the encoding, transmission, and management are completely completed by the same system, the technical risk is low, the image effect is guaranteed, and the implementation cycle is short.
Software access transformation is a highly technically difficult transformation method. It is based on the retention of all the original systems and adopts the SDK development method to connect the digital equipment in the original system with a new management platform, such as DVR digital hard disks. Video recorder equipment. This access method makes full use of the resources already built by the refinery and chemical companies, and can be quickly deployed for networked monitoring of mainstream embedded DVR systems.
Compare the pros and cons of the two access solutions, and finally determine the access transformation solution.
1. Based on the software platform digital docking front-end DVR equipment;
2. For DVR devices that are not yet compatible or companies that use a large number of digital monitoring systems, develop the SDK interface through the platform or update the DVR system software to achieve digital docking;
3. For refining and chemical enterprises without digital equipment, hardware docking is used as a supplement.
According to the accumulation of the author’s company in the IP field, in the face of a multi-brand, multi-structure, and complex deployment system, the realization of a high degree of unity of specific functions such as viewing, checking, controlling, alarming, and intercom, achieving a good compatibility effect, and specific system transformation The scheme is shown in the architecture of (Figure 1). Each refining and chemical enterprise involves different industrial TV systems. Through detailed investigation and classification, four types of transformation and access methods are counted, covering the transformation methods of the industrial TV subsystem of the refinery dispatching command system. .
Method 1: For refining and chemical companies whose front end is mainstream embedded DVR (some special PC-DVRs and a large number of third-party digital monitoring systems), the system will deploy DVR access servers to realize signaling and media processing for all DVR equipment of the company And forward.
Method 2: If the front end is a PC-DVR and cannot provide SDK and DVR manufacturer’s SDK technical support, then the PC-DVR is replaced, a hard disk video recorder is used, and the enterprise’s interface server is used to access the platform.
Method 3: For refining and chemical companies whose front-end is a non-mainstream embedded DVR, because they cannot provide SDK and DVR manufacturer’s SDK technical support, the non-mainstream DVR is replaced by a hard disk video recorder and accessed through the enterprise’s interface server 0 platform.
Method 4: For industrial TV systems with a pure analog matrix front end, the analog system (including the VS system and pure analog matrix system that cannot be developed) can only be re-encoded through the video encoder. If the number of analog front ends is small, It adopts 1:1 full encoding method; if the number of analog matrix front ends is large, use the control interface of 4 encoders and connect the control line of the matrix, and use the switching function of the platform to control the output channel of the matrix and the cloud of the front camera Station, reducing the number and investment of encoders.
Program features
1. Headquarters and branch offices hierarchical and domain-based networking
Each branch or refining and chemical enterprise park of Sinopec has built a large-scale monitoring system. Therefore, the design of the monitoring network must adopt a hierarchical and domain-specific strategy, that is, each branch or refining and chemical enterprise acts as a secondary platform (basic domain) to realize the cost The internal monitoring system of the company or refining and chemical enterprise is connected, and the management of all equipment and resources is realized at the same time. Calling online video resources.
2. Adjust measures to local conditions and protect investment
The construction principle of the project is to "protect the enterprise's original system investment to the greatest extent" and "do not change the status quo of enterprise industrial TV as much as possible", so the design strategy of "software integration as the main and hardware integration as the supplement" is adopted. Because its data network bandwidth is low and cannot meet the needs of centralized storage of all images to the Petrochemical Headquarters, a storage encoder is deployed to realize local storage of surveillance images; some enterprises need to check the original due to shorter construction time and newer equipment. There is a monitoring system to protect the old, and the in-depth design is carried out according to the specific brand and model of the enterprise equipment, and different access schemes are provided. For mainstream DVR equipment, through the deployment of proxy servers in branch companies (refining and chemical enterprises) to achieve soft docking; for non-mainstream embedded DVR brands and PC-DVR brands, through the deployment of video distributors and encoders with storage, by Unified management of VM video management server.
3. Unified and open integrated solution
It provides four basic components including the codec in the monitoring system, network storage equipment, network system and management platform, which can be used by Sinopec users to provide more comprehensive system services in the future.
Through the fusion of the four major component characteristics, the system architecture is optimized, the overall system efficiency, reliability and cost-effectiveness are improved, and the customization needs of users can be effectively met.
4. High-definition and low-latency video browsing
For the original mainstream system, development access and software integration can be realized. At this time, the clarity of the image reality mainly depends on the image quality of the front-end equipment. For the original non-mainstream system, high-definition front-end equipment can be provided to achieve a clearer visual experience.
High-definition real-time image quality: Fully comply with international standards such as MPEG2//H.264, FULL D1 encoding bandwidth* up to 4-8M (/H.264) ~ 8-16M (MPEG2), the industry's highest bit stream support provides More image details and HD image quality.
High-definition playback image quality: Independent storage code streams based on TCP and iSCSI ensure reliability and high playback image quality.
High real-time performance: The Switch has real-time performance of less than 300 milliseconds to meet the demanding needs of professional customers.
5. The system is safe and reliable
The Sinopec Emergency Command and Monitoring Networking System is a platform that provides video services for Sinopec users. Its biggest security risk lies in the management software platform. The software platform mainly includes various business management subsystems, which involve very important customer information and platform management information. The platform management subsystem also involves equipment configuration information, routing information, and network management information. Therefore, measures must be taken to ensure its safety.
This software platform can implement basic anti-attack, anti-illegal intrusion, anti-virus and other requirements. It can also ensure that only legitimate users can access and use the services provided by the network video surveillance system, and that users can only click on the licensed front-end equipment. The video surveillance images of the surveillance points that have the authority to use; to ensure the security of the video files saved by the user in the system, and will not be viewed by other users or even the system administrator privately.
The main task of the software platform is to complete the signaling processing of the services of real-time point-of-view and historical image playback. Therefore, the system resources are small, the load is small, the failure rate is greatly reduced, and the reliability is greatly improved. Even if the server is down, the video image can still be restored within 3-5 minutes.
6. National implementation and after-sales guarantee
In addition to technical difficulties, Sinopec has branches all over the country: Xinjiang in the west, Hainan in the south, Zhenhai in the east, and northern China covering most of North China. How to ensure that multiple implementation teams conduct on-site surveys, installation and commissioning at the same time is the biggest issue for suppliers. Challenges. In the past, such projects often encountered problems such as the original factory’s difficulty in ensuring sufficient resource input, resulting in serious project implementation cycles that were overdue or low efficiency of the entire network.
In this project, the national simultaneous input of resource guarantees satisfied the simultaneous progress of multiple implementation teams. The implementation and joint debugging were successfully completed within the project planning cycle to ensure that the industrial TV subsystem of Sinopec's production and operation system was put into use as scheduled.
Implementation Effect
The industrial television subsystem of Sinopec’s oil refining production dispatching and command system adopts digital video monitoring technology, and makes full use of the existing industrial television system resources and network resources of Sinopec and its subsidiaries to realize the control of 27 oil refining enterprises, 27 chemical enterprises and many The industrial monitoring systems of oilfields and sales companies are platform-based. Through a hybrid method of software development and hardware integration, relying on Sinopec’s dedicated network platform, the petrochemical headquarters-level industrial television platform and the new platform of the original industrial television system of each enterprise are realized. Integration and integration have successfully built the largest and most extensive networked monitoring system in China.
The production command and dispatch hall located on the 21st floor of the Sinopec Group headquarters often welcomes visits and inspections by party and state leaders, local representatives from various provinces and cities, and representatives of enterprises directly under the central government. At the Sinopec Production Command and Dispatch Center, you can read the information and data of Sinopec’s crude oil extraction, transportation, production, sales and other links at any time, and you can also call the industrial TV images of the secondary units' oil refining units in the subordinate regions. In addition to the oil refining sector, the industrial TV resources of other sectors such as chemical, sales, and oil fields have been gradually expanded to realize the unified networking and integration of industrial TV in petrochemical production. The dispatch center has become an interactive application platform integrating data collection and analysis, GIS geographic maps, GPS global positioning, industrial video networking and other services.
In addition, Sinopec headquarters can remotely command the scene of major accidents through this system, and remotely read and back up historical images of major events. One afternoon in 2010, a production accident occurred in a refining and chemical company. The operator immediately called the police upon discovery, and the branch immediately activated the Class A emergency plan. The group headquarters remotely access the nearest camera through the industrial television subsystem of the dispatch system to view on-site images for remote command, and participate in accident handling throughout the process. After 30 minutes, the accident was brought under control, no casualties were caused, and other production facilities were not affected, and production was normal.