Deconvolving Strain Maps Obtained with the Grid Method

Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

The use of various deconvolution techniques to enhance strain maps obtained with the grid method is addressed in this study. Since phase derivative maps obtained with this measurement technique can be approximated by their actual counterparts convolved by the envelope of the kernel used to extract phases and phase derivatives, non-blind restoration techniques can be used to perform deconvolution. Six deconvolution techniques are compared here in order to restore a synthetic phase derivative map. Obtained results are analyzed and discussed.

Keywords

Deconvolution Displacement Grid method Strain measurement Metrological performance 

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Copyright information

© The Society for Experimental Mechanics, Inc. 2014

Authors and Affiliations

  • M. Grédiac
    • 1
  • F. Sur
    • 2
  • C. Badulescu
    • 3
  • J.-D. Mathias
    • 4
  1. 1.Institut Pascal, UMR CNRS 6602Clermont Université, Université Blaise PascalClermont-FerrandFrance
  2. 2.Laboratoire Lorrain de Recherche en Informatique et ses Applications, UMR CNRS 7503Université de Lorraine, CNRS, INRIA projet MagritVandoeuvre-lès-Nancy, CedexFrance
  3. 3.Laboratoire Brestois de Mécanique et des SystèmesENSTA BretagneBrest, Cedex 9France
  4. 4.Laboratoire d’Ingénierie pour les Systèmes ComplexesIRSTEA, Campus universitaire des CézeauxAubière, CedexFrance

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