Dissertation > Excellent graduate degree dissertation topics show

The Development and Application of Panoramic 3D Measuring Instrument Based on Grating Projection

Author: WangZuoChen
Tutor: WuLuShen
School: Nanchang University
Course: Mechanical and Electronic Engineering
Keywords: fringe projection C8051F340 division drive automatic registration
CLC: TP391.41
Type: Master's thesis
Year: 2010
Downloads: 116
Quote: 1
Read: Download Dissertation

Abstract


3D measuring technique was widely applied in reverse engineering, product testing and other fields, but there were many constraints of the development of the realization of 3D measuring technique and point clouds registration. In this paper, a precise control of the fringe phase shift had been implemented by using the subdivision driving of the step motor, the automatic registration of multi-chip had been realized by using the conversion principle between turntable coordinate system and measurement coordinate system. On the basis of these, the panoramic 3D measuring instrument had been developed.Firstly, the paper analyzed several types of non-contact 3D measurements which are based on different theory and introduced general steps of 3D measurement of structured light. The solution phase theory and general principles of phase modulation had been introduced; the unwrapping theory and the related arithmetic of parcel information haf been analyzed. Furthermore, the overall program had been designed based on fringe projection 3D measuring theory.Secondly, the main hardware modules of the panoramic 3D measuring instrument had been designed in detail according to the overall program. When using C8051F340 as the main control chip, the reset of the control circuit and the level switch module had been designed as focus. In the point of the overall program, the precise control of the fringe phase shift according to the subdivided driving of the stepper motor, and above all, the requirements of the solution phase of the four-step phase shifting can be attained. The turntable’s structure had been designed in detail on the principle of panoramic measurement.Thirdly, in order to achieve the effective control of the hardware system, the control system of software had been designed. For example, the system main program, System initialization subroutine, stepping motor driver and CCD control subroutine had been designed on the foundation of the workflow of the panoramic 3D measuring system. And for the purpose of operating easily, the PC software had also been designed for human-computer interaction function. Finally, the transformation matrix between the turntable coordinate system and camera coordinate system had been obtained through the system calibration. The automatic registration of fragmentation point cloud had been achieved by utilizing the conversion operations which is received by inverse matrix of transformation and turntable rotation matrix transformed according the spatial coordinates of point cloud. The reliability of panoramic 3D measuring system and the validity of the automatic registration arithmetic of point cloud had been verified through the measurement of the porcelain vase. The data which gets from the panoramic 3D measuring system can be applied greatly during various engineering fields.

Related Dissertations

  1. Design Research on ECG Electrode Performance Measurement System,R318.6
  2. Design of Smart Temperature Controller Based on SOC,TP216
  3. Automatic Registration Based on Improved SIFT for Medical Microscopic Sequence Images,TP391.41
  4. Research and Implementation of Fpga-based Overprint Error Compensation Algorithm,TS83
  5. Research on Fast Geometry Processing for Magnitude Optical Satellite Remote Sensing Image,TP751
  6. The Calibration of Fringe Projection 3D Measurement System and the Improved Calibration Algorithm,TP391.41
  7. Three-dimensional visual system and calibration of the system parameters,TP391.41
  8. Point Cloud Collection and Processing of 3D Vision Reconstruction System Based on Parallel Mechanism,TP391.41
  9. Fringe projection design flying object attitude angle measurement system,TP29-AD
  10. Network Tester Based on Embedded Technology Research and Design,TP393.06
  11. Design of the Measurement and Control System of Image-tool Presetting Instruments,TP391.41
  12. Automatic registration algorithm for remote sensing image based on wavelet transform,TP391.41
  13. Three-Dimensional Shape Measurement Based on Color-Coded,TP391.41
  14. Local Affine Invariant Feature for Automatic Optics Remote Sensing Image Registration,TP751
  15. Inverse Projected-fringe-technique,TP274.4
  16. Study on Automatic Registration and Mosaic for Remotely Sensed Imagery,P237
  17. Gravure automatic register system,TP399
  18. 3D Measuremnet Based on Digital Phase-Shifting and Fringe Projection Technique,TG806
  19. The Data Processing of 3-D Shape Measurement Based on Digital Fringe Projection and Phase-shifting Technology,TG806
  20. Three Dimensional Profile Reconstruction Based on Fringe Projection,O438

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