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Laser Doppler vibrometer

About: Laser Doppler vibrometer is a research topic. Over the lifetime, 6319 publications have been published within this topic receiving 76068 citations.


Papers
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Journal ArticleDOI
TL;DR: A new type of electromagnetic vibration transducer designed to be placed onto the tympanic membrane was developed and showed displacements of vibration between 30 and 1 nm from 300 to 6500Hz and reduced in amplitude at higher frequencies.

36 citations

Journal ArticleDOI
TL;DR: In this article, particle image velocimetry (PIV) and laser vibrometry in a Mach number range between 0.26 and 0.78 were used to investigate the vortex street of a turbine blade profile (VKI-1, 58mm chord length).
Abstract: The vortex street of a turbine blade profile (VKI-1, 58 mm chord length) was investigated by particle image velocimetry (PIV) and laser vibrometry in a Mach number range between 0.26 and 0.78. While the laser vibrometer (LV) measured the frequency of the density fluctuations in the wake and around the profile, PIV helped to clarify the vortex shedding process. The recordings done by the LV resulted in detailed frequency data of vortex shedding when Mach number and Reynolds number were varied, while the results obtained by PIV enabled a phase resolved measurement of the flow field during vortex shedding.

36 citations

Patent
28 Nov 1996
TL;DR: In this article, a laser engraving system is used for carving a workpiece surface with a modulated laser beam to form a desired contour on the surface, where the fine structures of the contour are formed by the laser beam from a first laser, said beam being modulated by an acousto-optical modulator of relatively high modulation frequency.
Abstract: A laser engraving system (4) is used for engraving a workpiece surface (22) with a modulated laser beam to form a desired contour on the surface. The fine structures of the contour are formed by the laser beam from a first laser, said beam being modulated by an acousto-optical modulator (12) of relatively high modulation frequency. The deep regions of the desired contour are formed by the laser beam from a second laser (10), for which purpose the modulator (12) and second laser beam source (10) are commanded by interdependent but separate control signals (S3, S2). The two laser sources from the modulator (12) and second laser source (10) are polarised orthogonally relative to one another and are transmitted or reflected as appropriate by a selective mirror (14) and directed together through an optical system (18) onto the workpiece surface to be treated.

36 citations

Journal ArticleDOI
TL;DR: In this paper, large-amplitude (geometrically nonlinear) forced vibrations of a stainless-steel thin rectangular plate carrying different concentrated masses are experimentally studied, and the experimental boundary conditions are close to those of a clamped plate.

36 citations

Journal ArticleDOI
TL;DR: In this paper, a laser vibrometer was employed to measure the bending and torsional vibration displacements at the mid-span of the airfoil and the cylinder.

36 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202381
2022177
2021122
2020142
2019134
2018174