Design And Implementation Of Test Platform For Fault Monitoring System Of High-Speed Train Bogie

The inertia of high-speed train is very large in operation,and the load bearing and positioning of high-speed train depend on the bogie of the vehicle.The rotating parts of bogies work in bad conditions and are prone to cracks.If it is not ruled out in time,accidents are likely to occur,so the bogie fault monitoring has a very important practical significance.The topic of this thesis comes from the project of "Fault Monitoring System of High-Speed Train Bogie".The fault monitoring system mainly monitors the bogie environment temperature and the vibration and temperature of the rotating parts,through which the fault diagnosis can be made.Starting from the overall design of the fault monitoring system;aiming at the project needs of the "Fault Monitoring System of High-Speed Train Bogie",a test platform is designed based on LabVIEW development environment for system testing.The SCPI command is used to control the signal generator and the data receiving and processing of the Ethernet.The fault detection system is tested on the basis of existing instruments in the laboratory.The main contents of this thesis are as follows:(1)Participated in the design of the "Fault Monitoring System of High-Speed Train Bogie" in the early stage,determined the system scheme,introduced the relevant scheme and theoretical background,and studied some feasible algorithms of vibration signal analysis.According to the actual situation of the fault monitoring system project,the functional requirements of the test platform are determined,and the overall scheme of the test platform is determined.(2)The test of the system's Pre-processor has been completed.In order to test its fast Fourier transform function,complex mixed waveforms are needed.In this thesis,a program-controlled signal generator is used to mix several sinusoidal signals and noises by software.SCPI instructions are automatically generated and transmitted to the signal generator through VISA,so that the signal generator can output the desired waveform.(3)The main control board of the system has been tested.It needs to test its ability to transmit 16 signals to the monitoring platform.According to UDP protocol of transmission layer,the test platform receives signals from the main control board card,and restores 16 signals according to the rules of packaging data of the main control board card,and further processes the data according to temperature signal and vibration signal.According to the characteristics of PT100,the temperature signal is converted from voltage to resistance to temperature,and the vibration signal is converted from FFT.Received data is stored in TDMS.(4)Improve the human-computer interface and functions.Because the fault monitoring system itself does not include human-computer interaction function,the test platform is also used for system function demonstration and project acceptance while providing fault system testing.After the completion of the fault monitoring system,the test platform designed in this thesis has been tested to improve the system function;the fault monitoring system has completed the acceptance of the CARS through the test platform.The test platform achieves the expected demand in practical application.