Time-averaged phase-stepped ESPI with CO2 laser and shearography in the visible for identification of vibration mode shapes

Vandenrijt, Jean-François; Thizy, Cédric; Georges, Marc

doi:10.1117/12.2195337

Paper published in a book (Scientific congresses and symposiums)

Time-averaged phase-stepped ESPI with CO2 laser and shearography in the visible for identification of vibration mode shapes

Vandenrijt, Jean-François; Thizy, Cédric; Georges, Marc

2015 • In Mendoza Santoyo, Fernando (Ed.) SPECKLE 2015: VI International Conference on Speckle Metrology

Peer reviewed

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https://hdl.handle.net/2268/185616

DOI
10.1117/12.2195337

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Keywords :

electronic speckle pattern interferometry; shearography; vibration analysis; time-average; CO2 laser; microbolometer array; long-wave infrared

Abstract :

[en] We present investigation of interferometric methods for vibration mode identification to be applied on shakers in industrial environment. We consider long wave infrared ESPI in time-averaged mode with the use of phase-stepping which allows transforming Bessel fringes, typical to the time averaging, into phase values which provide a better way for identification of vibration mode shapes. The use of long laser wavelength allows measuring larger amplitudes of vibrations compared to what is achieved in visible light. Also longer wavelengths allow lower sensitivity to external perturbations. Time-averaged phase-stepped shearography in visible is also used as a compared alternative to LWIR ESPI for working in industrial environments. Although not demonstrated here, an interesting feature for the future investigations on LWIR ESPI is its potentiality of simultaneous temperature measurement during vibrations

Disciplines :

Physics

Author, co-author :

Vandenrijt, Jean-François ; Université de Liège > CSL (Centre Spatial de Liège)

Thizy, Cédric ; Université de Liège > CSL (Centre Spatial de Liège)

Georges, Marc ; Université de Liège > CSL (Centre Spatial de Liège)

Language :

English

Title :

Time-averaged phase-stepped ESPI with CO2 laser and shearography in the visible for identification of vibration mode shapes

Publication date :

August 2015

Event name :

SPECKLE 2015: VI International Conference on Speckle Metrology

Event organizer :

Centro de Investigaciones en Optica

Event place :

Guanajuato, Mexico

Event date :

24-26 Aug 2015

Audience :

International

Main work title :

SPECKLE 2015: VI International Conference on Speckle Metrology

Author, co-author :

Mendoza Santoyo, Fernando

Publisher :

SPIE, Bellingham, WA, United States

Collection name :

Proceedings of SPIE, Vol. 9660

Pages :

96600N

Peer reviewed :

Peer reviewed

Additional URL :

http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2422779

Name of the research project :

A.O.C.

Funders :

Service public de Wallonie : Direction générale opérationnelle de l'économie, de l'emploi et de la recherche - DG06

Available on ORBi :

since 06 September 2015

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Bibliography

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