Dissertation > Excellent graduate degree dissertation topics show

Research on Focus Controlling System Based on Image Processing

Author: LvMeng
Tutor: FuXing
School: Tianjin University
Course: Measuring Technology and Instruments
Keywords: Laser micromachining Focus control CMOS OV7141
CLC: TG665
Type: Master's thesis
Year: 2010
Downloads: 83
Quote: 0
Read: Download Dissertation

Abstract


With the pulse laser micromachining technology advances made on the machining accuracy of the increasingly high demand , the laser processing system put forward higher requirements. Moreover , in order to achieve some special processing , flexible focus control technology to improve the processing effect one of the important research topic . The purpose of this paper focus control system, an increase in the laser micromachining system to improve and expand the effectiveness and capacity of laser micromachining system processing . This paper designs a focus control system based on image processing technology . The system mainly includes : a laser light source , light source, imaging Lens , image acquisition / control system , and several other parts of the one-dimensional motion platform . The laser light source with a wavelength of 355nm UV nanosecond pulsed lasers ; lighting source 650nm red module group ; imaging optical path selection Navitar company's internal coaxial the confocal zoom lens with apochromatic objective combination , successfully resolved the laser focal plane imaging the confocal focal plane ; OV7141 CMOS image sensor as the imaging and control system of the imaging device , an image obtained by the DSP processing acquisition and outputs a control signal to control the axial direction of action of the one-dimensional motion platform for accurate focusing , after focusing by the DSP given direction and displacement signals so that the focal point and the surface being processed to maintain a controlled distance , i.e. the focus control . Related experiments show that the system can be completed initial focus control functions, and has a certain focus accuracy . The work done by this thesis is as follows: using imaging optics and image processing principles , the design of the focus control system for laser micromachining ; 2 to CMOS CPLD , DSP as the core image acquisition and control system design create and debug hardware circuit ; completed the design and commissioning of the system software , including PC image acquisition interface and motion control part ; build autofocus experimental system, the related experiments , adjust the focus control system focus criterion has been studied , and the focus accuracy test .

Related Dissertations

  1. Research on the Image Acquisition System Based on CMOS Star Sensor,V448.2
  2. The Research and Design of Low Voltage Low Power CMOS Analog Multiplier,TN432
  3. The Application of CMOS Imaging Sensor on AOI Equipment,TP212
  4. Thedesign of a Low-voltage Brushless DC Vibration Motor Driver,TM33
  5. A 2.4GHz CMOS Low Power Zero-IF Receiver for Wireless Sensor Network,TN858
  6. Noise Analysis and Image Processing of CMOS Image Sensor,TP212
  7. Full-featured phase-change memory chip design and integrated process of post-,TP333
  8. A high priority value of CMOS image sensor readout circuit design,TP212
  9. Uncooled infrared sensor readout circuit study,TP212
  10. Research on high-speed CMOS smart camera,TB852.1
  11. The Hardware Design of a Multi-Sensor Optoelectronic Measuring System Based on OMAP-L138,TN29
  12. Integration with CMOS infrared detector for breast cancer research,TP391.41
  13. Research and Design of Low Noise Amplifier in RFIC for Satellite Navigation,TN722.3
  14. CMOS image sensor parallel test development,TP212
  15. Parallel feedback binary adder,TP332.21
  16. For low-power radio-frequency identification tag of a memory circuit,TP333
  17. Design of Ultra-wideband Power Amplifier,TN722.75
  18. Study of Paper Currency Image Information Aquisition and Detection System,TH693.5
  19. Design and Study of Infrared Optical Positioning System in Surgical Navigation Based on FPGA,R318.6
  20. Space radiation environment on the performance of CMOS image sensors Experimental Study on Effect,TP212

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Special machine tools and processing > Light processing equipment and processing
© 2012 www.DissertationTopic.Net  Mobile