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Proceedings Paper

Vibro-acoustic characterization of industrial structure: contribution of the laser vibrometer
Author(s): Xavier Carniel; Jean-Claude Pascal
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Paper Abstract

The use of Laser-Doppler vibrometers for noncontact vibration measurements is increasing to allows the characterization of dynamic behavior of structures where the traditional accelerometers are unusable due to small sized structures, high frequency of high temperatures. Installed on a robotic deplacement system, these vibrometers allow the realization of cartographys. The system developed at CETIM comprises of two vibrometers on one 4 axes robot, and enables the mappings of vibrational velocity and also the measurement of energy flows, that allows the visualization of the of transmission paths and the calculation of the vibrational power for characterizing the forces injected into structures. Some techniques, like modal analysis can be improved by the use of such devices. The paper presents the system and the results obtained and insists on the practical aspects of experimentations. After a reminder of the quantities measured, the influential parameters are put forward: the surface state, the positioning of systems, sensitivity, the phase mismatch, aspects of signal processing on automatic measurements, etc...some examples of application are presented.

Paper Details

Date Published: 8 September 1994
PDF: 10 pages
Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); doi: 10.1117/12.185351
Show Author Affiliations
Xavier Carniel, CETIM/DAI (France)
Jean-Claude Pascal, CETIM/DAI (France)

Published in SPIE Proceedings Vol. 2358:
First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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