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Digital Speckle Correlation Technique and Its Application in Monitoring Structure

Author: ChenDaQing
Tutor: GuJiHua
School: Suzhou University
Course: Optics
Keywords: Digital speckle Image processing Correlation algorithm Scrambling degree Open Systems
CLC: U446.2
Type: Master's thesis
Year: 2005
Downloads: 252
Quote: 1
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Abstract


In this paper, such as bridges , pile the need for monitoring in-service structure , the main computer image processing technology in digital speckle measurement , including laser speckle and white speckle two aspects . Main content of this paper is as follows : white speckle methods and digital methods based on a detailed analysis of the long-range oblique optical axis imaging , as fuzzy and imaging position change of the white digital speckle correlation method , and gives like fuzzy and imaging position change , error theory formula . The proposed reference measurement technology to overcome the oblique optical axis imaging position change impact , given a new long-range oblique optical axis high precision measuring surface displacement , and given the sensitivity and accuracy of the system . 2 digital speckle correlation technology automatically given the subject of the new method , and measurement and control process . This method can be under the control of the computer automatically accurate measurement of the amplification factor of the optical system . 3 . Study laser digital speckle -by- point analysis of the structure of the audience detected with the CCD collected directly by the computer of the speckle pattern processing with digital array methods complement each other to enhance the accuracy of the point-by-point method , practical sex . In the Windows system using C and Matlab language to establish an open digital speckle measurement processing system provides an open software platform for conducting digital speckle measurement research . The openness of the software , you can quickly build the speckle measurement techniques required control procedures .

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CLC: > Transportation > Road transport > Bridges and Culverts > Bridge test observations with the test > Bridge Observation and equipment
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