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8 September 1994 Vibro-acoustic characterization of industrial structure: contribution of the laser vibrometer
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Proceedings Volume 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1994) https://doi.org/10.1117/12.185351
Event: Vibration Measurements by Laser Techniques: First International Conference, 1994, Ancona, Italy
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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Xavier Carniel and Jean-Claude Pascal "Vibro-acoustic characterization of industrial structure: contribution of the laser vibrometer", Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); https://doi.org/10.1117/12.185351
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