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On the measurement of angular vibration displacements: a laser tiltmeter

journal contribution
posted on 04.12.2015, 16:02 by Neil A. Halliwell, Alan Hocknell, Steve RothbergSteve Rothberg
A novel modification and use of the optical geometry which is used as the basis for the Laser Torsional Vibrometer [1] is described. This latter instrument measures the torsional oscillation (or local rotational speed fluctuation) of a rotating component of arbitrary shape and in the presence of solid body vibrations of the component itself. The Laser Torsional Vibrometer relies on the mean speed of rotation of the component to produce a time resolved voltage analogue of the angular velocity. There are many cases of engineering interest however where a component undergoes an angular oscillation about an axis rather than a simple translation or rotation with a unidirectional angular velocity In modal analysis for example where rotational and translation motions are of equal importance the absence of suitable transducers means rotational mobilities are rarely measured [2]. In what follows it is shown how a modification to the optical geometry of the Laser Torsional Vibrometer can produce an instrument which is capable of measuring the local angular or tilt velocity in this situation and will therefore solve this problem.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

JOURNAL OF SOUND AND VIBRATION

Volume

208

Issue

3

Pages

497 - 500 (4)

Citation

HALLIWELL, N.A., HOCKNELL, A. and ROTHBERG, S., 1997. On the measurement of angular vibration displacements: a laser tiltmeter. Journal of Sound and Vibration, 208 (3), pp. 497 - 500.

Publisher

Elsevier ( © Academic Press)

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

1997

Notes

This article is closed access.

ISSN

0022-460X

Language

en

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