Image-based methods in vibration measurements typically require the use of complex high-speed camera systems. By using the recently introduced Spectral Optical Flow Imaging method, full-field high-frequency vibration data can be measured using a cost-effective still-frame camera. Using a single camera, only the motion perpendicular to the optical axis can typically be identified. Depth information, lost in the 2D imaging process, can be obtained by employing multi-camera imaging systems. Alternatively, the recently introduced frequency domain triangulation method offers a way of measuring full-field 3D deflection shapes using a single, moving camera. This research presents the required theoretical background to combine the Spectral Optical Flow Imaging and frequency-domain triangulation methods in an experimental modal analysis experiment using a single, moving still-frame camera. Vibrations of an arbitrary-shaped specimen can be identified in the frequency domain, extending the field-of-view of the established image-based vibration measurement methods while improving the numerical efficiency of the data processing stage. A real-world validation test case is presented.


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    Titel :

    Still-Camera Based 3D Experimental Modal Analysis


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Gorjup, Domen (Autor:in) / Slavic, Janko (Autor:in) / Boltežar, Miha (Autor:in)

    Kongress:

    Noise and Vibration Conference & Exhibition ; 2021



    Erscheinungsdatum :

    31.08.2021




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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