Research On The Experimentation System Of Locomotive's Electric Bow

Electric Bow is one of Locomotive's important high-voltage equipments. Aiming at the present detection limitations inherent in the traditional testing methods and some large scale testing systems,a new portable testing system on the parameter and capability of Locomotive's electric bow is dissertated and designed. According to the "On board-On line testing" idea,it brings developers a high requirement to construct and design a mini & portable detection system:to power the system using DC(Direct Current) storage battery;to develop an 110V DC power supply used for control in this system;to design an intelligent driving loop for Hybrid stepping motor based on the Main-Sub Microprocessor group;to provide workers a friendly interface using the LCD(Liquid Crystal Displaying) technology and a mini-keyboard;to Harmonize the whole system using MCU based detection and control cell to provide a high precise platform to the data acquisition,the data analysis,as well as the data saving.Firstly,the current testing localization in the detection of electric bow is analyzed and the new system's whole construction developed in this thesis is introduced;In the 2rd chapter,the embedded 110V DC power supply is analyzed and constructed,and with experiments,some dissonant results such as the fluctuation of output PWM(Pulse Width Modulation) pulses,the power noise added to output voltage,and the drop of output voltage have been analyzed and the problems have been broken down one by one;In chapter 3,stepping motor's drive has been systematically dissertated,and combing stepping motor's subdivided drive technology,the author develops an intelligent mini-step driving circuit using a Main-Sub Microprocessor structure,which is validated in the hybrid stepper based system;In the 4th chapter,Liquid Crystal driving and displaying technology is specified in detail,with one sort of LCD modules (TLM12864H),the author develops an feasible circuit for the new testing system,designs a menu mode based program structure and brings here some programming codes using Franklin C51 programming language;In chapter 5,the above built system is used in the electric bow's practical detection,and the differentiating rate of this system is analyzed. In the final parts of this thesis,the author retraces back to this system and draws a conclusion. In general,the portable testing system on the capability and parameter of Locomotive's electric bow possesses an optimized system structure,an excellent operating platform,high precise testing methods,and provides us a system with novelty as well as practicality.