Design And Application Of Online Diagnosis System For SS4B Electrical Equipment

In our country,railway is one of the main modes of modern transportation.It occupies an important position in the whole field of transportation and plays an increasingly important role.It plays an irreplaceable role in social development and national economic construction.With the rapid development of electric locomotive technology,computer hardware technology and continuously improved computer software system,it is possible to develop on-line diagnosis system for locomotive electrical equipment.So it seems that the application of computer software and hardware technology in the diagnosis and detection of locomotive electrical equipment is particularly important.Therefore,in order to meet the needs of railway development,shorten locomotive maintenance cycle and reduce locomotive breakdown rate,it is necessary to design and manufacture an on-line diagnostic system for locomotive electrical equipment for Shaoshan electric locomotive.The system can display relevant equipment(logic control unit,computer cabinet and some discrete letters)in real time when locomotive is running.Real-time data,and in the locomotive of the relevant electrical equipment failure,according to the real-time data of locomotive operation to diagnose the location of the fault,promptly provide crew or technicians with fault solutions and judgment basis.This paper takes the electrical equipment of typical SS4B electric locomotive of Shenhua Railway as the research object,based on the disassembly,assembly and maintenance of some equipment as the research content,taking the current "SS4B Electric Locomotive Overhaul Rules" data of enterprises as the background,according to two-dimensional drawings and related information,aiming at the current situation of electrical equipment overhaul,completes the work.An on-line diagnostic system of SS4B electric locomotive electrical equipment is built on the computer.The system framework,hardware design principle,software design principle,system function and test method of the on-line diagnostic system of SS4B electric locomotive electrical equipment are introduced in detail.The main research work is as follows:(1)First,the basic composition of electric locomotive is briefly introduced.Then,the principle of condition monitoring and fault diagnosis of electric equipment in electric locomotive,the technology of fault signal acquisition and the method of fault signal analysis and processing are expounded.Finally,the fault diagnosis method based on neural network is briefly analyzed.(2)taking the electrical equipment of SS4B locomotive as the research object of diagnosis,the frame design of online diagnostic system is completed.The overall design of on-line diagnosis system for SS4B locomotive electrical equipment is introduced in detail.The main contents include the overall system framework,circuit design and plug-in box design.Finally,the selection of hardware is briefly introduced.(3)Completed the software design part,using C language to design the program flow of upper and lower computer,and completed the design of the related interfaces of SS4B locomotive electrical equipment online diagnosis system platform.Finally,through repeated debugging and operation,the design of on-line diagnosis system for SS4B locomotive electrical equipment is successfully completed.