Design Of Vibration Signal Detection Device For HXN3 Locomotive Drive System

The drive system is mounted on the bogie to form the core component of the locomotive running department,which is the key factor to ensure the safety of the locomotive and the transportation capacity.The continuous uninterrupted operation of the locomotive leads to accelerated wear of key components of the drive system,deteriorated working conditions,and performance parameters are also constantly changing.Therefore,the status detection of the locomotive drive system has always been the focus of ensuring the safety and reliability of the locomotive.The most commonly used method is to perform the vibration detection and analysis on each key component.Vibration analysis is of great significance for evaluating the assembly quality of rolling stock and the fault diagnosis and identification in maintenance.Based on the above background,this subject takes the HXN3 locomotive drive system as the research object,and designs a vibration signal detection device for vibration signal collection and signal processing and analysis in the routine detection test of the drive system.The thesis introduces the development of vibration detection equipment at home and abroad,and summarizes two major design directions,one is the vibration signal acquisition and processing,and the other is the vibration signal diagnosis and analysis method.Firstly,the diagnosis analysis method of vibration signal is researched,and the method is compared and analyzed using MATLAB simulation,and then the optimal wavelet packet base noise reduction method and DEMD decorrelation algorithm are selected for the comprehensive analysis of vibration signal characteristics of HXN3 locomotive drive system,which laying the foundation for the design part of the vibration detection device.Secondly,according to the design needs analysis and technical indicators,the overall scheme of vibration signal detection is proposed.The hardware part explains the selection and calibration of the front-end vibration sensor,the selection of the processor and the vibration acquisition method.The software part selects the Lab VIEW environment and after determining the software structure,carry out software development of the host computer.Then,design the specific hardware circuit,and taking DSP processor TMS320C6747 as the core and adopting DSP +CPLD method,design and program the signal conditioning circuit,A/D conversion circuit,minimum system circuit and communication circuit.Finally,based on the designed hardware and signal analysis method,the software function modules are divided,and the program panel and user interface are designed in the Lab VIEW development environment to realize the collection,storage,processing and analysis of the vibration signal of the HXN3 locomotive drive system.According to the requirements of the project,build a simulation test platform to debug all parts of the device and bearing vibration test,After verifying the performance of the designedvibration signal detection device,the on-site HXN3 locomotive drive system test platform was established to conduct on-site vibration detection tests and analyze the test data.The results show that the hardware and software parts of the designed vibration detection device can meet the predetermined design requirements.