Simultaneous u-v displacement field measurement with a phase-shifting grid method

Yves Surrel; Bing Zhao

doi:10.1117/12.195524

30 November 1994 Simultaneous u-v displacement field measurement with a phase-shifting grid method

Yves Surrel, Bing Zhao

Proceedings Volume 2342, Interferometry '94: Photomechanics; (1994) https://doi.org/10.1117/12.195524
Event: International Conference on Interferometry '94, 1994, Warsaw, Poland

Abstract

We present here a non-moire method of displacements measurement, where the image of a crossed network bonded onto a body under examination is acquired with a CCD camera. The zoom magnification is chosen so that the test grid is sampled at a frequency of three pixels by grid period. The processing of the recorded image corresponds to a 3-bucket algorithm, applied to both horizontal and vertical lines. One obtains the two components of the displacements, and, by differentiation, the three components of strains and the local rotations. Experimental results have been already obtained, concerning a novel shear test on composite materials. Only one image is needed to obtain all the information. The method looks similar to the spatial phase-shifting technique proposed in the field of moire, but here no moire is involved.

Citation Download Citation

Yves Surrel and Bing Zhao "Simultaneous u-v displacement field measurement with a phase-shifting grid method", Proc. SPIE 2342, Interferometry '94: Photomechanics, (30 November 1994); https://doi.org/10.1117/12.195524

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available