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Study on Digital Speckle Correlation Method and Its Application

Author: TanHaoYun
Tutor: KangYiLan;QinQingHua
School: Tianjin University
Course: Engineering testing with intensity analysis
Keywords: Digital speckle correlation method Binocular stereo vision Camera Calibration Three-dimensional deformation measurement
CLC: TP391.41
Type: Master's thesis
Year: 2008
Downloads: 252
Quote: 0
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Abstract


Digital speckle correlation method than the past two decades developed a non-contact game optical measurement method , with several other optical measurement methods in experimental mechanics , it has some unique advantages . The technical development of the two-dimensional digital speckle correlation method has matured and become a recent research direction to expand its scientific research and engineering practice , be more attention to the technical study of the three-dimensional digital speckle correlation method . Authors around the application of the two-dimensional digital speckle correlation method and three-dimensional digital speckle correlation method technology and its associated measurement software system to carry out the work of the Master's stage productions . Digital speckle correlation method to determine the deformation of an object based on a the surface randomly distributed speckle field statistical correlation before and after deformation . The introduction of the principle of binocular stereo vision to digital speckle correlation method , measured by the three-dimensional morphology of the surface as well as three-dimensional deformation is three-dimensional digital speckle correlation method . The field of applied research in the two-dimensional digital speckle correlation method for microscale thin film materials with micro material material properties testing difficulties , associated with two - dimensional digital speckle method measured the poise of the composite film and porous silicon film loose than the coefficient for the study of the performance of these materials provide the basic mechanical parameters . Carry out a three-dimensional digital speckle correlation method , the coarse search search method based on non-linear transformation given initial joint stereo matching technique applied to improve the search match the speed and accuracy of a point of the same name . Improved camera calibration checkerboard target reduced to 15mm, deformation measurement of three-dimensional digital speckle correlation method under the conditions of the small field of view , so that the camera 's field of view . The preparation of a three-dimensional the morphology reconstruction and three-dimensional displacement measurement on the basis of the theoretical research , image processing software , and successfully applied to the rubber material deformation field measurements of the crack tip region .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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