Design Of On-line Detection System For Diesel Locomotive

With the rapid development of social economy,China’s high-speed railway construction has entered a speed-up period,locomotive operation speed is also faster and faster,which brings great challenges to locomotive safety.Reduce the accident rate of locomotive operation,In order to improve locomotive operation safety,besides regular maintenance and repair of locomotives,real-time detection and acquisition of locomotive equipment state parameters are also needed in the process of locomotive operation,diagnosis and analysis of the collected data,and early warning is issued before the occurrence of potential safety hazards.With the development of electronic information technology,sensor technology,wireless network transmission technology and computer control technology in recent years,it has laid a solid foundation for the development of online detection technology.Locomotive on-line detection system can improve the reliability of locomotive operation,greatly reduce the potential safety hazards,and bring greater economic benefits to enterprises.Firstly,this paper reviews the research background and development situation of locomotive detection system,and introduces the characteristics of mature detection system abroad.Through the analysis of locomotive operation status,64-channel digital and 9-channel analog signals are selected to collect,and 64-channel digital acquisition circuit,9-channel analog acquisition circuit,filter amplifier circuit and V-channel analog acquisition circuit are designed.V/F conversion circuit,optocoupler isolation circuit,F/V conversion circuit and A/D conversion circuit,and completed the program design of diesel locomotive online detection system.The program consists of initialization module,"watchdog" module,digital acquisition module and analog acquisition module.In the process of internal combustion locomotive operation,the most important parameters reflecting locomotive operation state should be selected for acquisition.Through comprehensive analysis,64 digital and 9 analog channels are selected as the objects of this collection.In the software design,the program stores the collected data,analyses the parameters exceeding the threshold according to the pre-given threshold,and provides reasonable suggestions and opinions for the crew.The program is written in C language and the compiler is keil C5 l.The compiler is easy to use and can support many different control chips.