Speckle Cross-Correlation Method in Measuring Fine Surface Displacements

Industrial applications need regular testing for the lifetime, movement, strength, and performance of manufacturing machines during production process. Since speckle photography is a simple economic technique, it is used in investigating object response under mechanical and thermal effects depending...

Full description

Saved in:
Bibliographic Details
Published in:Journal of atomic and molecular physics 2012-01, Vol.2012 (2012), p.1-6
Main Authors: Bahrawi, M., Farid, N., Abdel-Hady, M.
Format: Article
Language:English
Subjects:
Accuracy
Deformation
Economics
Interference fringes
Movement
Rigid-body dynamics
Speckle patterns
Strength
Studies
Translations
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Industrial applications need regular testing for the lifetime, movement, strength, and performance of manufacturing machines during production process. Since speckle photography is a simple economic technique, it is used in investigating object response under mechanical and thermal effects depending on the movement of the speckle patterns with respect to the deformation strength and direction. In the present work, the cross-correlation technique is used to analyze the speckle patterns by iterative method to define both values and directions of rigid body translation and expansion. In order to check the accuracy of the cross-correlation technique, the results are compared with the displacement values given by analyzing the Young's interference fringes resulted from the Fourier transformation of the speckle patterns. This noncontact technique is found to be accurate and informative depending on the stability and sensitivity of the optical system. This method of measurement is an effective tool in studying the hard cases of objects and machines under various effects.
ISSN:1687-9228
2314-8039
1687-9236
2314-8020
DOI:10.1155/2012/976376