Dissertation > Excellent graduate degree dissertation topics show

Train’s Impulse Real-Time Detection and Analysis Based on Virtual Instrument

Author: LiGeFei
Tutor: MoYiMin
School: Wuhan University of Technology
Course: Mechanical Design and Theory
Keywords: virtual instrument LabVIEW LabWindows data processing impulse detection
CLC: U260.1
Type: Master's thesis
Year: 2005
Downloads: 164
Quote: 1
Read: Download Dissertation

Abstract


An analysis system about comfort by train was introduced by this paper based on virtual instrument. G language (LabVIEW) is used as software platform and monolithic processor and acceleration sensor (ADXL105) are used as hardware platform, composed of data acquisition, data preliminary handling, signal analysis(time domain analysis 、 frequency domain analysis)and impulse grade assessment, with the function of data acquisition, data storage and data analysis, and has friendly interface.This data acquisition block of this analysis system uses microcomputer(AT89C52), and other circuits as platform to data acquisition. The analogy signal is amplified and filtered by data preliminary procession block, such as amplify circuits and filter circuits.The signal time domain and frequency domain block are used to domain analysis and frequency analysis. The impulse grade assessment block of train is the core of this analysis system, using data procession functions in LabVIEW and LabWindows, and achieve the grade assessment.During the data acquisition, there are other elements except noise, which can make some difficulties in data analysis and data procession. So, it is not right to judge the impulse grade from the only accelerator. How to analysis the data and find the impulse exactly, we need some algorithm procession.An autocorrelation method was introduced by this article, and this method can detach impulse from vibration accelerator and assess the impulse grade quantitatively.The sampled accelerator are composed of accelerator signal、 background noise、impulse accelerator. When the train run steadily, its R_x (0) is small. When there is impulse signal, there must be period signals in the sampled signal. According to the autocorrelation definition, the R_x (τ) will attenuate slowly in the 0 - ∞This system acquires the accelerator at different speed by train between XiangFan —WuHan. According to the impulse intensity and frequency, conducts corresponsive frequency domain analysis and autocorrelation analysis, and builds a new impulse grade assessment criterion based on the correlation peak and the width of the peak.

Related Dissertations

  1. Image Analysis System of Metal Transfer of Gas Metal Arc Welding,TG444
  2. Study of Automobile Ignition Coil Testing System Based on Standard LAH032.905,U472.9
  3. Research on Nozzle Plume Temperature Distribution Measurement System,V434
  4. Data Collecting and Processing of Multi-Linear-CCD Visual Measuring System,TP274.2
  5. The Electrostatic Dust Removal System Based on Microcontroller and LabVIEW,X701.2
  6. Development of Tractor’s Virtual Instrument System Based on CAN Bus,S219.02
  7. Oil -in-water type emulsified oil water hammer harmonic LabVIEW Simulation and Experimental Research demulsification,X703
  8. LabVIEW-based virtual oscilloscope design and remote control,TM935.3
  9. Leak before break (LBB) method in the PWR Pipeline Analysis Application,TL353.11
  10. Node-based intelligent interaction IOT Data Processing,TP391.44
  11. CAN bus technology in the meteorological monitoring System Research and Implementation,P409
  12. Axial fan blade vibration non-contact measurement,TD441.2
  13. Exploration and Analysis of Electronic Detection of Raw Silk’s Flatness,TS147
  14. Control System Research for a Nano-Material Mixer,TP273.5
  15. The Designing of HD Vehicle Detection System Based on Fpga,TP391.41
  16. Simulation System for Aluminum Foil Cold Mill and Research of Tension Control,TG334.9
  17. Design and realization of high-speed of the wind tunnel balance calibration software,TP311.52
  18. Research and Application of Remote Virtual Instrument Experimental Teaching System Based on LabVIEW,TP391.6
  19. Research on State Diagnosis on Fan Based on Factor Analysis and BP Neural Network,F426.61
  20. Multi-channel Real-time Online Monitoring System for Polymerizers,TP274
  21. Research on Thin-Film Hysteresis Loop Measurement System Based on Extraordinary Hall Effect,O484.43

CLC: > Transportation > Rail transport > Locomotive works > General issues > Locomotive theory
© 2012 www.DissertationTopic.Net  Mobile