Title :
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
fDate :
5/1/1993 12:00:00 AM
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;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
