Quantitative Vibration Amplitude Measurement Using Stroboscopic Phase Shifting ESPI


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The stroboscopic phase shifting ESPI (SPS-ESPI), one of the optical vibration amplitude measurement techniques, is presented. Although the general PS-ESPI can be used for quantitative deformation measurement of the object, this technique cannot measure the vibration amplitude with itself only. The phase change due to the vibration of the object cannot be calculated with general PS-ESPI correctly. Therefore, in order to solve this problem, the stroboscopic illumination must be introduced to the general PS-ESPI. This can be done by using a device called as AOM (Acousto-Optic Modulator). In this paper, SPS-ESPI is applied to measure the vibration amplitude of the square plate whose all edges were fixed. The natural frequencies and mode shapes are analyzed by using ANSYS. And the results obtained by using SPS-ESPI technique are compared with that of the ANSYS analysis. The vibration amplitude is measured by using SPS-ESPI quantitatively.



Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi




H. C. Jung and K. S. Kim, "Quantitative Vibration Amplitude Measurement Using Stroboscopic Phase Shifting ESPI", Key Engineering Materials, Vols. 321-323, pp. 95-98, 2006

Online since:

October 2006




[1] G.B. Warburton, The vibration of rectangular plates, Proc. I. Mech. Eng., Vol. 168 (1954), pp.371-384.

[2] B.W. Golley, Natural frequencies of rectangular plates, Mechanics Research Communications, Vol. 23 (1996), pp.625-631.

DOI: https://doi.org/10.1016/s0093-6413(96)00068-7

[3] K.J. Gåsvik, Optical Metrology, 2nd Ed. (John Wiley & Sons, Chichester, 1996).

[4] J.D.R. Valera, J.D.C. Jones, and O.J. Løkberg, Exact vibration amplitude derivative measurement with TV shearography, Meas. Sci. Technol., Vol. 7 (1996), pp.918-922.

DOI: https://doi.org/10.1088/0957-0233/7/6/010

[5] T.M. Keris, Digital Holography for Metrologic Applications, in: Interferometry in Speckle Light: Theory and Applications, ed. P. Jacquot and J. -M. Fournier (Springer-Verlag, Berlin, 2000).

DOI: https://doi.org/10.1007/978-3-642-57323-1_25

[6] W. Steinchen, L. Yang, G. Kupfer, P. Mäckel, and A. Thiemich, Vibration analysis by digital speckle pattern shearing interferometry,, Proc. SPIE, Vol. 3098 (1997), pp.158-165.

DOI: https://doi.org/10.1117/12.281155