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University of Huddersfield Repository University of Huddersfield Repository Feng, Guojin Optimisation of vibration monitoring nodes in wireless sensor networks Original Citation Feng, Guojin (2016) Optimisation of vibration monitoring nodes in wireless sensor networks. Doctoral thesis, University of Huddersfield. This version is available at http://eprints.hud.ac.uk/id/eprint/30320/ The University Repository is a digital collection of the research output of the University, available on Open Access. Copyright and Moral Rights for the items on this site are retained by the individual author and/or other copyright owners. Users may access full items free of charge; copies of full text items generally can be reproduced, displayed or performed and given to third parties in any format or medium for personal research or study, educational or not-for-profit purposes without prior permission or charge, provided: • The authors, title and full bibliographic details is credited in any copy; • A hyperlink and/or URL is included for the original metadata page; and • The content is not changed in any way. For more information, including our policy and submission procedure, please contact the Repository Team at: [email protected]. http://eprints.hud.ac.uk/ OPTIMISATION OF VIBRATION MONITORING NODES IN WIRELESS SENSOR NETWORKS Guojin Feng Supervised by Professor Andrew D. Ball and Dr Fengshou Gu October 2016 School of Computing and Engineering University of Huddersfield OPTIMISATION OF VIBRATION MONITORING NODES IN WIRELESS SENSOR NETWORKS LIST OF CONTENTS LIST OF FIGURES ........................................................................................................ 5 LIST OF TABLES ......................................................................................................... 12 LIST OF ABBREVIATIONS ....................................................................................... 13 ABSTRACT .................................................................................................................. 16 DECLARATION ........................................................................................................... 18 ACKNOWLEDGEMENT ............................................................................................ 19 LIST OF PUBLICATIONS .......................................................................................... 20 Chapter 1 INTRODUCTION .................................................................................. 22 1.1 Importance of maintenance ...............................................................................................................23 1.2 Machinery failures and maintenance strategies ................................................................................23 1.3 Introduction of condition-based maintenance ...................................................................................27 1.4 Research aims and objectives ...........................................................................................................37 1.5 Outline of thesis ................................................................................................................................39 Chapter 2 INVESTIGATION ON WIRELESS SENSOR NETWORKS AND THEIR APPLICATIONS FOR CONDITION MONITORING .............................. 40 2.1 Introduction to wireless sensor network ...........................................................................................41 2.2 Wireless protocols for WSN .............................................................................................................42 2.3 Review of WSN for condition monitoring ........................................................................................48 2.4 Investigation on wireless sensor platforms .......................................................................................55 2.5 Summary ...........................................................................................................................................59 Chapter 3 HARDWARE DESIGN FOR A WIRELESS CONDITION MONITORING SYSTEM............................................................................................ 60 3.1 Overall structure of the wireless CM system ....................................................................................61 3.2 Main baseboard .................................................................................................................................62 3.3 Vibration sensor conditioning booster pack ......................................................................................65 3.4 Wireless extension booster pack .......................................................................................................71 3.5 Battery booster pack .........................................................................................................................76 3.6 Summary ...........................................................................................................................................77 Chapter 4 INVESTIGATION OF SIGNAL PROCESSING TECHNIQUES FOR ROLLING BEARING CONDITION MONITORING ............................................. 78 DEGREE OF DOCTOR OF PHILOSOPHY (PhD) 2 OPTIMISATION OF VIBRATION MONITORING NODES IN WIRELESS SENSOR NETWORKS 4.1 Introduction to rolling element bearing ............................................................................................79 4.2 Time-domain analysis .......................................................................................................................83 4.3 Frequency-domain analysis ..............................................................................................................91 4.4 Time-frequency analysis ...................................................................................................................97 4.5 Selection of signal processing algorithms ....................................................................................... 105 4.6 Summary ......................................................................................................................................... 111 Chapter 5 ENVELOPE ANALYSIS IMPLEMENTATION ON THE WIRELESS SENSOR NODE .......................................................................................................... 112 5.1 Data acquisition .............................................................................................................................. 113 5.2 Data processing ............................................................................................................................... 117 5.3 Data transmission ............................................................................................................................ 131 5.4 Performance analysis ...................................................................................................................... 132 5.5 Summary ......................................................................................................................................... 136 Chapter 6 IMPROVEMENT OF THE FREQUENCY RESOLUTION OF ENVELOPE SPECTRUM ......................................................................................... 137 6.1 Theoretical background .................................................................................................................. 138 6.2 Algorithm implementation .............................................................................................................. 142 6.3 Results and discussion .................................................................................................................... 147 6.4 Summary ......................................................................................................................................... 150 Chapter 7 OPTIMAL BAND-PASS FILTER SELECTION BASED ON FAST KURTOGRAM ........................................................................................................... 151 7.1 Investigation on optimal band-pass filter selection ......................................................................... 152 7.2 Introduction to fast kurtogram ........................................................................................................ 153 7.3 Implementation of fast kurtogram in the wireless sensor network ................................................. 156 7.4 Results and discussion .................................................................................................................... 163 7.5 Summary ......................................................................................................................................... 170 Chapter 8 IMPROVEMENT OF COMPUTATION SPEED OF ENVELOPE DETECTION METHODS ......................................................................................... 171 8.1 Simple envelope detectors .............................................................................................................. 172 8.2 Hilbert transform based envelope detection .................................................................................... 179 8.3 Spectral convolution and spectral correlation ................................................................................. 187 8.4 Comparison and benchmark ........................................................................................................... 193 8.5 Implementation of short-Time RMS and spectral correlation for high spectrum resolution ........... 201 8.6 Summary ........................................................................................................................................
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