Research Of Monitor And Control System For Diesel Testing Station Of Dongfeng₄ Internal-Combustion Locomotive

The control technology has changed from distributed control system(DCS) to fieldbus control system(FCS) now and will be replaced by the latter. The core of FCS is fieldbus, and the technology of fieldbus is the synthesis and the integration of the computer technology, the communication technology, control technology, The fieldbus brought profound transformation. For the characteristics of full-digital, full-dispersive, full-opening, the fieldbus control technology is becoming the main of auto-control. As one of the standard of fieldbus, CAN has been regarded as one of the most promising fieldbus for its high-powered, high-reliability and particular design, and has been used in more and more fields. SHCAN2000 control system is based on the CAN, which adapts to medium-small-sized system, and being extended and used broadly, has provided a new way for our enterprises' production equipment.From 1990's,internal-combustion locomotive has become one of primary tow drive in railway transport. As one of important part of internal-combustion locomotive, the diesel's function affects the running safety of railway transportation directly; and the diesel's consume oil of railway locomotive accounts for more than one thirtieth of whole light diesel oil in our country, the diesel's quality affect also using rate of energy sources and atmosphere index of pollution .According to setted by Bureau of Locomotive , Ministry of Railway, the repaired diesel must be tested in the testing station, and may be fixed in the locomotive after checked in order to running safely. At present, the diesel testing is controlled by hand in most enterprises of our country with uncultured technology, low performing technical standard, high working intensity, bad working condition, and low efficiency. It is necessary that design a safe, reliable, efficient controlsystem for exerting resource virtue, proving the development of national economy.This paper puts forward a fieldbus control system project in allusion to diesel testing station of Jinzhou Locomotive Section, Shenyang Bureau. This paper discusses software and hardware construction of SHCAN2000 fieldbus, the design and realization of software and hardware in the course of practical application. Integrating computer reconstructing of diesel testing station, the paper presents the solution of adopting to SHCAN2000 system to realize automatic control, including loop auto-control, test data auto-collection, friendly human-machine interface, test reports auto building, etc. The function configuration realization of operation station and field control unit is discussed in this paper.This control system has successfully applied in Jinzhou Locomotive Section, Shenyang Bureau. The system has strong function, good control effect, and generalize application value. This proves the scheme design properly and practically, which realizes boiler control by FCS. This paper makes valuable attempt for field-bus' further application on industry control field.