Analysis of the application status of industrial computers (referred to as industrial computers) in the expressway industry: With the continuous increase in the number of domestic expressways and the continuous development of computer information technology, the application of intelligent transportation systems in the high-speed industry is becoming more and more in-depth, in which the use of industrial computers for high-speed The automatic control of the full name of the highway is the current application trend, and this application is also being carried out in major highway systems. This paper introduces the development status and structural characteristics of industrial computers in detail, combined with the mechanical and electrical engineering of highways. The application situation and development trend are aimed at allowing more owners and integrators to further understand industrial control products, so as to choose more applicable and better products, so that the use, maintenance and management of the system can play a greater role and create more high efficiency.
Industrial Computer Definition
Industrial computer is an industrial control computer, which is a general term for tools that use a bus structure to detect and control the production process, its electromechanical equipment, and process equipment. It has important computer attributes and features such as computer CPU, hard disk, memory, peripherals and interfaces, and a real-time operating system, control network and protocols, computing power, and friendly human-machine interface.
Industrial Control System Classification
In 1983, the industrial computer was included in the computer series type spectrum and development plan. The main categories of industrial control systems in the world today are: IPC (PC bus industrial computer referred to as industrial computer), PLC (programmable control system), DCS (distributed control system) , FCS (field bus system) and CNC (numerical control system) five kinds.
Because IPC (Industrial PC) can make full use of the progress of computer technology, it is easy to update, and the software it runs is exactly the same as that of ordinary PC, which is convenient for software development and debugging, so it is the fastest developing and applied model at present. The industrial control system used in the early highway toll system has applications, but it is no longer used.
IPC structure
IPC: An industrial computer based on a PC bus. According to IDC statistics in 2000, PCs have accounted for more than 95% of general-purpose computers. Because of their low price, high quality, large output, and abundant software and hardware resources, they have been familiar and recognized by the majority of technical personnel. The basics of computer heat. Its main components are industrial chassis, passive backplane and various boards that can be inserted into it, such as CPU card, I/O card, etc. And adopt the design of all-steel casing, machine card layer filter, double positive pressure fan and EMC (electro magnetic compatibility) technology to solve the electromagnetic interference, vibration, dust, high/low temperature and other problems in industrial sites including highway sites.
IPC features
1) Reliability: Industrial PC has the characteristics of dust, smoke, high/low temperature, humidity, vibration, corrosion and rapid diagnosis and maintainability. Its MTTR (Mean Time to Repair) is generally 5min, MTTF is more than 100,000 hours, while ordinary The MTTF of PC is only 10,000 to 15,000 hours.
2) Real-time, the industrial PC conducts real-time online detection and control of the industrial production process, responds quickly to changes in working conditions, collects and adjusts output in time, (the watchdog function is not available in ordinary PCs) Reset to ensure the normal operation of the system.
3) Expansion, industrial PC has strong input and output function due to the baseboard + CPU card structure, and can expand up to 20 boards, which can be connected with various peripherals and boards in the industrial field, such as with the controller, video Monitoring systems, vehicle detectors, etc. are connected to complete various tasks.
4) Compatibility, can use ISA and PCI and PICMG resources at the same time, and support various operating systems, multi-language assembly, multi-tasking operating systems.
Industrial Computer Applications
1) Toll system The toll system of the expressway has generally gone through three periods: manual toll, computer toll, and ETC (ELECTONIC TOLL COLLECTION non-stop toll). In the second period of the charging system, the industrial computer was used. The main model used was a general-purpose standard host with a width of 19" and a height of 4U. The volume is 177 MM high X482 MM wide X452 MM deep, can expand 4 PCI, 8 ISA, 2 PCISA cards and various peripherals at the same time, such as pass reader/writer, charge special keyboard, charge receipt printer, electric / Manual railing machine, vehicle detector, vehicle type display, toll display, monitoring system and counter, alarm equipment, signal lights, MODEM, etc. Due to the small and bulky industrial computer of the toll booth itself and the idleness of some resources, the industrial According to market demand, PC manufacturers have introduced smaller industrial PC cases (170MM high*166MM wide*395MM deep), such as YONGS's IPC-6806 and YONGS' IPC6806, which not only greatly reduce the volume, but also further improve the The utilization rate of resources is improved. If the application requirements of industrial computers tend to be more miniaturized during the charging period of computers, in the ETC period, the trend will be integrated and industrialized, and equipment such as industrial computers and lane control will be integrated. However, because there is currently no unified standard for ETC in China, system integrators are all integrated and incompatible with each other. However, if relevant departments can formulate relevant industry specifications and interface standards as soon as possible, then the national highways will be integrated into one network. One-card non-parking charges will finally realize "one-card travel all over the world".
2) Monitoring system: As one of the three major electromechanical projects of expressway, the monitoring system is an investment with large investment and no obvious short-term economic effect. The current highway monitoring is mainly divided into toll monitoring and traffic monitoring. There are three modes: analog video CCTV, digital DVR, and network DVR. Since the CCTV monitoring period only uses CCTV and video recorders for monitoring and video recording, it is completely manual operation. With the development and application of digital and video technologies, in the digital DVR era, integrators have adopted industrial PCs and video capture cards that have strong scalability (such as multiple hard drives, multiple ISA/PCI resources, etc.) and can run stably for a long time. Video compression cards and other components form a DVR system. When the vehicle inspection instrument and the lane controller detect that an image needs to be captured, the system can automatically capture and record images. The types of industrial PCs used during this period also ranged from large (IPC-810) to small (IPC-6806), but the monitoring during this period was limited to the monitoring of toll booths (kiosks) and other monitoring or information systems on the entire expressway did not. With the development of network technology and the application and requirements of ITS, industrial PC manufacturers provide high-performance LAN such as YONGS IPC-68IIVDNF (B), IPC1621VN, YONGS PCA by integrating on the CPU card (motherboard). -6166ECPU card, etc., have provided high-performance industrial-grade 10/100M adaptive network interface, so that system integrators can share and make full use of all resource systems through networking, so that the collected traffic After the information data is analyzed and processed, it is sent to each information terminal through the information release system to guide and control the traffic flow in real time and further improve the traffic capacity of the road.
Based on the application of the above industrial computer in the two major electromechanical projects of highways, it is not difficult to see that the trend of its application is the gradual miniaturization of industrial PCs, and with the narrowing of the industry gap and the unification of standards, some final products will be integrated. .
industrial computer problems
1. The department in charge of highways is not clear. There are actually four departments involved in expressway management in a certain province. The diversification of investment subjects makes the management work more complicated.
2. There is no unified industry standard and specification.
3. Monitoring has not received greater attention and utilization, resulting in the status quo of only monitoring but not monitoring, and the linkage with charging has not been fully realized.
