Frequency domain characterization of the vibrations of a tuning fork by vision and digital image processing
Fiche publication
Date publication
janvier 2009
Auteurs
Membres identifiés du Cancéropôle Est :
Dr SANDOZ Patrick
Tous les auteurs :
Sandoz P, Carry E, Friedt JM, Trolard B, Reyes JG
Lien Pubmed
Résumé
We demonstrate an experimental setup and associated digital image processing software for measuring the vibrational amplitude of a tuning fork with subpixel accuracy. Stroboscopic illumination allows the use of a standard video camera to explore the resonant frequencies up to the kHz range. No preliminary surface patterning is required because the image processing is based on features present in the object's structure. Because the tuning fork is a high quality-factor resonator, it can be used for demonstrating the spectral power distribution of various excitation signals and the temperature dependence of the resonance frequency. The procedure can be generalized to the measurement of the in-plane lateral displacements of any structure.
Référence
Am J Phys. 2009 Jan;77(1):20-6