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System Overview
The Sinopec Fuel IC Card Project is a cross-platform, wide-ranging, and wide-ranging nationwide system construction project. In response to the ever-increasing service demand and the technological development trend of “informatization driving industrialization”, Sinopec Corp. has realized the transformation of Sinopec’s refined oil retail system by using advanced electronic information technology and using IC cards as the carrier. Through the construction of the project, the goal of “one card in hand, refueling everywhere” is realized in all gas stations under the jurisdiction of Sinopec. Replace the traditional settlement methods such as cash and oil ticket with IC card, a modern payment tool, install gas station management and control system at gas stations, realize the electronic payment of refined oil retail business and automatic collection of transaction data; improve gas station management and management The technological content and service level of the company will further improve work efficiency, reduce costs, and enhance the ability to resist market risks. Sinopec’s refueling IC card project will cover more than 25,000 petrochemical companies in 20 provinces (autonomous regions, municipalities, and cities under separate state planning) affiliated to Sinopec Corp., more than 260 prefecture-level companies, and more than 1,300 county-level companies. stand.
The Sinopec gas IC card system is designed with a 4-layer structure, namely the head office level (including the Sinopec Management Center and the Sinopec Data Exchange Center), the provincial level, the prefecture level, and various business terminals (including county-level management terminals). , Gas stations, card issuing outlets, etc.).
System topology description
Gas station: It is the place where Sinopec’s refined oil retail business takes place, and it directly provides refueling services to customers.
Card-issuing outlets: provide users with services such as account opening, card issuance, top-up, loading, loss reporting, and inquiries.
Prefecture-level front-end system: Provide data forwarding functions at card issuing outlets, gas stations, and provincial data centers.
Provincial Data Center: Establishing user accounts, sorting out and clearing gas card transactions, is the core of business management and data processing.
Sinopec General Center: Responsible for the sorting of gas card transactions and arbitration of disputes, and the management of retail business based on the gas IC card transaction system
Provincial Management Center: Manage the retail business of gas stations affiliated to provincial oil companies.
Prefecture-level management center: manage the retail business of gas stations affiliated to prefecture (city) oil companies.
County-level management terminal: manage the retail business of gas stations affiliated to county-level oil companies.
System Block Diagram
The 25,000 gas stations in the entire gas IC card project will be equipped with a control PC as a business terminal. The control PC is responsible for daily IC card refueling quantity and amount statistics, transaction receipt printing, fuel dispenser monitoring, daily sales transactions are sent to the provincial data center, and the account management information and the latest fuel prices of national IC card users will be downloaded. The following is a schematic diagram of control:
The control PC of the gas station plays a very important role. Once the control PC fails, the normal operation of the gas station will be affected. Sinopec’s more than 25,000 gas stations are scattered. Most of the gas stations are far away from the city center. Many gas stations are located in mountainous areas. Once the control PC fails, maintenance and replacement will be very troublesome. Therefore, Sinopec’s primary requirement for PC control is the reliability of the system. Secondly, the fuel dispenser is connected to the control PC through a serial port. The number of fuel dispensers in the gas station ranges from 2 to more than 30. Therefore, the control PC is required to have strong functional scalability. In order to ensure the stable operation of the management and control PC system, Sinopec chose Turbolinux Data Server as the operating system for the management and control PC. Therefore, it is required that the management and control PC be fully compatible with Turbolinux in hardware and can run smoothly.
At the beginning of the selection of controlled PC equipment, a total of more than 10 commercial PC and industrial PC manufacturers participated in the selection. After many comparisons, Sinopec finally designated the control PC as an industrial PC. Industrial PC has made many special designs to improve system reliability, and its reliability is much better than commercial PC. The following is a system structure diagram of a commercial PC:
We call this structure a large motherboard structure, which is very unsuitable for on-site use and maintenance requirements. Active devices such as the north-south bridge control chip are integrated on the main board. Active devices are more easily damaged than passive devices such as capacitors and resistors. Once the motherboard is damaged, it will be very troublesome to replace it: the on-site maintenance personnel first need to unplug all the data cables on the motherboard, then need to unplug all the peripheral cards inserted on the motherboard, such as network cards, graphics cards, etc., and finally need to fix the motherboard Remove the screws one by one to remove the motherboard. To change to a new motherboard, the above process must be repeated one by one. It takes 30 minutes to replace a damaged motherboard in this way. Such a long MTBF (Mean Time Between Failure to Maintain) is not allowed for actual use at gas stations. In addition, commercial PCs do not have a special design for the shockproof of the system. When there is vibration interference around, it is easy to cause damage to the hard disk and the failure of the card to jump out. Once the hard disk is damaged, all transaction data for a day will be lost.
Compared with commercial PCs, industrial PCs have made great improvements in structure. The following is a schematic diagram of the structure of industrial PCs:
The motherboard of the industrial PC is made into the form of a plug-in card, which is inserted on the passive backplane. There are only passive components such as ISA, PCI bus connectors and capacitors and resistors on the passive backplane, so the probability of damage to the passive backplane is very low, and there is usually no worries about replacement. If the motherboard is damaged, just pull out the motherboard. Therefore, the MTBF time of the system is greatly shortened. In addition, the main board and peripheral cards of the system have special fixing strips to prevent the board from jumping out. The hard disk drive has a hard disk shock absorber and a shock-absorbing rubber pad, which can reduce the damage to the hard disk caused by vibration. In order to make the industrial PC work reliably in a high dust environment, the air inlet in front of the industrial PC is equipped with a replaceable dust-proof net. As shown below:
Picture description: The dust-proof net design can effectively prevent dust from entering the chassis.
System Configuration
Motherboard: FSC-1613VN
Chassis: IPC-810A
CPU: PIII 1G
Memory: 128M
Hard Disk: 40G
In the application of Sinopec, it is necessary to fully consider the requirements of the gas station field application on the reliability of the management and control PC. How to enhance the system reliability of the industrial PC from many aspects is the key, as follows?
1. Motherboard
Industrial motherboards are the core of PC control, comprehensive consideration of speed and reliability requirements, and high cost performance, must adopt a complete industrial design;
2. RAID card
The daily use of gas station control PCs will involve a large amount of data storage issues, these data include oil prices, refueling quantity, refueling customer data, etc. Once the data is damaged, it will cause serious consequences. However, hard drives are vulnerable parts and are easily damaged due to vibrations, shocks and other reasons. To ensure the security of system data. A Promise SMA RAID card is installed in the system that controls the PC. The Raid card combines two hard drives of the same specification into Raid 1 (disk mirroring). In this way, in the case of a hard disk damage, the control PC can still operate normally.
3. Industrial power supply
Unstable mains power supply is an important cause of computer damage. In suburbs, rural areas and other places, the power supply network has over-voltage, under-voltage, or surge voltage. This can cause the computer to fail to start or the power supply to be broken down. In addition, the power supply for the control PC configuration is a wide-range industrial power supply, which can also work normally in an environment with an external voltage range of 85V~265V.
4. Electromagnetic compatibility
Electromagnetic compatibility is also an important link. Electromagnetic compatibility testing includes CE, FCC, etc. The control PC has reached the FCC Class A standard in the National Electromagnetic Testing Center. It is reported that last year, EVOC Intelligent also tested the electromagnetic compatibility of industrial computer. The company will deliver the industrial computer products to the National Electronic Computer Quality Supervision and Inspection Center for monitoring. Finally, it passed the Sinopec IC card refueling control machine-Electromagnetic Fast A-level index for transient pulse group immunity test. That is, the industrial computer works normally under the conditions of the peak voltage of plus or minus 2000V and the repetition frequency of 5KHZ (the national production license inspection requires a voltage of plus or minus 1000V). Certified the technical indicators for the company’s industrial computer as a shortlist for Sinopec.
5. System scalability
The control PC has 4 PCI slots and 7 ISA slots, which can fully meet the expansion requirements of future system functions. In order to ensure the reliability of the whole machine, in terms of product testing, the whole machine needs to undergo a 24-hour dynamic burn-in test before leaving the factory. This ensures that every industrial PC that leaves the factory can operate reliably in harsh environments.
[系统评价]
Since May 2002, Sinopec gas IC card projects have been implemented in Beijing, Shanghai, Fujian, Jiangsu, Shandong, Guangdong and other provinces. Most of the control PCs in these provinces use industrial PCs. After one year of actual operation, the control PC was stable and reliable on-site, which was well received by Sinopec.
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