Dissertation > Excellent graduate degree dissertation topics show

Wear Debris Shape Analysis and 3D Reconstruction

Author: HeXiaoZuo
Tutor: WangHong
School: Wuhan University of Technology
Course: Signal and Information Processing
Keywords: ferrography wear debris image processing 3D reconstruction microscope
CLC: TP391.41
Type: Master's thesis
Year: 2005
Downloads: 219
Quote: 2
Read: Download Dissertation

Abstract


The ferrography is a fault diagnosis method based on the analysis of wear particle. In the ferrography, wear particle images reflect the important information of the spare part wearing and tearing within the mechanical equipment. The recognition of the wear particle is the core step of the ferrography. The result of the recognition has direct relation to the correctness of the wear condition monitoring for the equipments. As the composition of the wear debris is the same to the composition of the wear part, an appropriate judgment of the wear debris composition would allow a right definition of the source of the wear particle generation and provide valuable information to the maintain of machinery. The primary component analysis was applied to the wear particle HSI color parameters to judge the composition of the wear debris.Wear debris analysis is restricted to the 2-D shape analysis, because of the limitation of the cost and capability of the 3-D imaging equipment. 3-D analysis is used in some special case. As the depth of field of optical microscope is limited, the sum-modified-Laplacian (SML) operator is used as the image focusing evaluation function. Then the wear debris surface altitude is measured. The image pixels correspond to the focus altitude are segmented from the image and a full depth image is formed. Then the surface altitude information and the full depth surface image is fused together to reconstruct the 3-D surface of wear debris. For real time reconstruction, a quick reconstruction arithmetic is provided. For the reconstruction of the 3-D shape, a change was applied to the optical microscope to get an appropriate equipment to measure the 3-D shape of wear debris. A debris analysis and surface reconstruction software was designed on the Visual C++.net platform.The main contents of the thesis are as follows:1. The development and up-to-date status of wear particle analysis technology and 3-D measure technology at home and abroad are evaluated synthetically. Thestudy plan and main content are presented.2. Principal component analysis is applied to the analysis of wear debris HSI color parameters, and a method to determine the composition of wear debris is found.3. The use of image processing in ferrography image analysis and the theory of 3-D measurement and its use in wear debris measurement is discussed.4. A 3-D shape measurement set is designed using DSP, step-motor, optical microscope, CCD camera and computer, and used on measure 3-D shape of debris5. Software on Visual C++.net is brought forward to analyze debris and reconstruct the 3-D shape of wear debris. The 3-D shape of a wear debris is rebuild using the set mentioned above to collect the 2-D image serial and reconstruct the 3-D shape.

Related Dissertations

  1. Research on Temperature Measurement Technique Based on CCD Image Sensor,TH811
  2. Research on Basic Algorithms of Digital Image Processing and Implementation with FPGA,TP391.41
  3. Research on the Image Real-Time Acquisition, Storage and Image Processing System,TP391.41
  4. Research on Visual Servo System of Mechanical ARM,TP242.6
  5. Three-Dimensional Numerical Modelling for the Head and the Electric Field Analysis of DBS,R742.5
  6. Application of Semi-Structure in Leisure Dress,TS941.2
  7. Survey in Nanjing and Analysis of the Mitochondrial Genome of Frankliniella Occidentalis (Pergande),S433
  8. Research on Identification System of Cashmere and Wool Fiber,TS101.921
  9. Design of Garlic Planting Sorting Machine Based on Image Processing,S223.2
  10. Study on Detection and Grading of ’Jiro’ Persimmon’s External Quality Based on Computer Vision,S665.2
  11. In Vitro Biofilm Formation of Enterococcus Faecalis in Starving Phase and Antibacterial Effect of Sodium Hypochlorite,R780.2
  12. Comparison of Endonasal Endoscopic Surgery and Microsurgery for Prolactinomas.,R736.4
  13. To Observe the Effect of Different Dental Filling Technologies on the Microleakage under Confocal Laser Scanning Microscope,R783
  14. Study on the Application of the Dental Microscopy in the Operation of Root Tip Resection,R781.05
  15. The Designing of HD Vehicle Detection System Based on Fpga,TP391.41
  16. Research on Face Recognition Methods Based on Flexible Neural Tree,TP391.41
  17. Research on Automatic Reading System for Digital Meters,TP391.41
  18. The Gray Image Processes Techology of Sediment Core and Its Application on the High Resolution Sediment Record in Inner Shelf of the East China Sea,P736.21
  19. Design and Implementation of Intelligent Transportation Video Monitoring System Based on 3G Network,TP391.41
  20. Research on Regression-based Super-Resolution Image Reconstruction Technique,TP391.41
  21. Research on Machine Vision High-speed Positioning System Based on Linear Motor,TM33

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
© 2012 www.DissertationTopic.Net  Mobile