1. System Overview
With the rapid development of the national railway construction, the degree of automation of the railway freight system has developed from the initial stage to the advanced stage, and the overall level has reached the world's advanced level. The automated construction of freight marshalling stations is a core part of the entire railway transportation system. Freight is the pillar of railway transportation efficiency. Unlike passenger transportation systems, it requires a lot of manpower expenditure. Once it is built, it can maintain stable operation for many years. Railway freight transportation is a very strict discipline, and the requirements for accuracy of time, correctness of operation, and safety of operations are quite strict, so it is known as semi-military management.
Due to the specific environmental conditions of the railway freight marshalling station, the operation workshop of the marshalling yard is not as ideal as the air-conditioning machine room. The operation workshop is very vibrating, some are relatively humid, and even do not have air conditioning (high and low temperature resistance requirements for equipment). In order to ensure safe, efficient, and stable operations, the company's ruggedized terminals are introduced to this field. The ruggedized terminals of Yanxiang show their talents here. Its fully sealed fanless design and excellent shock resistance are compatible with GJB 322A rugged The perfect anti-electromagnetic interference capability meets the requirements of GJB 151A, and the protection level of the whole machine reaches IP54. The anti-leaching design eliminates the worry of frequent water ingress in the marshalling station workshop. The application of EVOC's ruggedized terminal in the railway system is becoming more and more mature. It is currently widely used in passenger information display system (PIDS), automatic ticket checking system (AFC), master control, in-vehicle monitoring and other projects. It is a trusted partner .
Second, the system principle
It can be seen in the planning of the Ministry of Railways that the railway freight dispatching system is the heart of the entire transportation system. It controls the transportation of goods on various lines, and it is important to ensure the transportation of military and civilian materials. Economic and national defense construction has made significant contributions.
The core part of the marshalling station is the dispatching center, which is responsible for directing the dispatch, arrival, disassembly, marshalling and departure of freight trains. The arrival and departure building is responsible for picking up and leaving the train, that is, entering the information of the arrival and departure trains into the database, and reporting to the dispatch center and signal building. The Hump Signal Building pulls the freight train to Hump according to the plan of the dispatch center, and regroups them. The field staff disassembles the vehicle according to the operation plan printed by the hook. The operator of the Hump Signal Building operates the rail switch through the console. Regroup. The statistical office sends the report to the relevant departments of the group in the form of an electronic report through the railway backbone network through the statistical report, and transmits it to the next marshalling station to ensure the accuracy and speed of the information. The signal building strictly controls the railway signal according to the arrival and dispatch plan of the dispatch center. The hooking system is a railway dedicated hooking controller connected to a needle printer, which is responsible for remote printing tasks, and quickly prints the tasks assigned by the dispatch center to the field workers.
According to the on-site investigation, the working environment of each working station of the marshalling station is dusty, humid, and some will also rain. The working temperature difference is large, and it may face a low temperature of minus 30 ° C in the north. On-site operators responded to the general-purpose computers and printers used before, and the failure rate was very high, seriously affecting normal production. Adopting EVOC's ruggedized terminal can completely overcome this harsh environment, achieving dustproof, waterproof, anti-vibration, anti-shock, wide temperature operation (-30 ℃ ～ + 65 ℃), greatly prolonging the service life, and ensuring the safety of marshalling operations Sex.
3. System block diagram
4. System configuration:
The dispatch center, arrival building, and statistics room are equipped with rugged flat-panel terminals JPD-1701, and the hump building and signal building are equipped with rugged flat-panel display terminals JDS-1902.
JPD-1701 rugged tablet terminal system configuration:
CPU processor: Onboard L2400 1.66G Core Duo 1.66G
Memory: 512MB DDRâ…¡, expandable to 2GB
Storage: 80G hard disk
Expansion slot: PC-104plus
I / O interface: VGA, PS / 2, 2 USB2.0, 2 serial ports, 1000Mbps network port, parallel port
Display: 17 ″ LCD screen, resolution 1280 & TImes; 1024, brightness ≥300cd / m2 (touch screen optional)
Power supply: 180W power supply (power DC optional)
JDS-1902ESP rugged flat panel display terminal:
Display: 19 ″ LCD screen, DVI + VGA interface
Resolution: 1280 & TImes; 1024
Brightness: 300cd / m2
Contrast: 800: 1
Interface: BNC interface, VGA interface
Wide temperature operation: -15 ℃ ～ + 60 ℃
EMC performance: meet the relevant requirements of GJB151A
Interface: DVI, VGA, power interface, all use aviation connector to connect
Power supply: 60W AC / DC power supply
V. System evaluation
This system uses EVOC's rugged tablet terminal and auxiliary equipment. The rugged tablet terminal adopts a fanless fully sealed and reinforced design, and uses an Intel low-power processor, which overcomes the factors such as heavy dust, humidity, and strong vibration in the railway marshalling station. The service life of the computer is greatly prolonged, the cost is saved, and the safe and stable operation of the freight dispatching system is guaranteed, which has won unanimous praise from customers.
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