3D vision method applied to measure the vibrations of non-flat items with a two-mirror adapter - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Journal of Physics: Conference Series Année : 2018

3D vision method applied to measure the vibrations of non-flat items with a two-mirror adapter

(1, 2) , (1) , (2) , (3) , (2)
1
2
3

Résumé

In order to measure low frequency vibrations with a stereo sensor, it is interesting to increase the angles between the cameras and the measured surface, as the out-of-plane displacements are then more visible on the images. Even if Digital Image Correlation has proven to be a valid tool to measure vibrations, the initial pairing process remains difficult, in this context, because of the large pan angle, all the more so if the measured object presents significant variations in depth (for example a loudspeaker). This conference paper thus presents a new method specifically designed to rectify images (referred to as the IRIs method), which successfully allows initializing the vibration measurement with a high number of measurement points. In the same way, the conventional single-camera pseudo stereo system with a four-mirror adapter, which is largely used to perform displacement measurement, remains rather complex to operate. This paper thus proposes a single-camera simplified system, with a two-mirror adapter only. The ensuing global protocol is more user-friendly, and even if the results obtained for vibration measurement are a little less accurate with the two-mirror adapter, the operational modal shapes have been successfully retrieved and match very well those obtained with the conventional set-up.
Fichier principal
Vignette du fichier
Durand-Texte_2018_J._Phys.%3A_Conf._Ser._1149_012008.pdf (2.43 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02407348 , version 1 (12-12-2019)

Licence

Paternité - CC BY 4.0

Identifiants

Citer

Thomas Durand-Texte, M. Melon, Elisabeth Simonetto, Marie-Hélène Moulet, Stéphane Durand. 3D vision method applied to measure the vibrations of non-flat items with a two-mirror adapter. 13th International Conference on Vibration Measurements by Laser and Noncontact Techniques, Jun 2018, Ancona, Italy. pp.012008, ⟨10.1088/1742-6596/1149/1/012008⟩. ⟨hal-02407348⟩
100 Consultations
22 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More