Measurement of the longitudinal and transverse vibration frequencies of a rod by speckle interferometry

Author

Bayón, A. ; Gascón, F. ; Varadé, A.

Author_Institution

Dept. de Fisica Aplicada a los Recursos Naturales, Univ. Politecnica de Madrid, Spain

Volume

40

Issue

3

fYear

1993

fDate

5/1/1993 12:00:00 AM

Firstpage

265

Lastpage

269

Abstract

A heterodyne interferometric system was used to detect the normal and tangential components of the displacement at one point of a sample when it is vibrating freely in its natural modes, arising from transient excitation. A cylindrical aluminium rod was the test sample. An analysis of the spectrum associated with the in-plane and out-of-plane displacements made it possible to determine the values of the longitudinal and transverse natural frequencies.<>

Keywords

aluminium; displacement measurement; light interferometry; speckle; vibration measurement; cylindrical Al rod; heterodyne interferometric system; in-plane displacement; longitudinal vibration frequencies; out-of-plane displacements; speckle interferometry; transient excitation; transverse vibration frequencies; Detectors; Frequency estimation; Frequency measurement; Laser beams; Optical interferometry; Optical scattering; Optical sensors; Piezoelectric transducers; Speckle; Vibration measurement;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.216840

Filename

216840