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.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Still-Camera Based 3D Experimental Modal Analysis


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Noise and Vibration Conference & Exhibition ; 2021



    Publication date :

    2021-08-31




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Still-Camera Based 3D Experimental Modal Analysis

    Gorjup, Domen / Slavic, Janko / Boltežar, Miha | British Library Conference Proceedings | 2021


    Digital Still Video Camera

    Ochi, S. | British Library Online Contents | 1990


    Digital Electronic Still Camera

    Holland, Samuel D. / Yeates, Herbert D. | NTRS | 1993


    High-Speed Camera based Experimental Modal Analysis for Dynamic Testing of an Automotive Coil Spring

    Egner, Felix Simeon / Wang, Yonggang / Willems, Thijs et al. | British Library Conference Proceedings | 2021


    Modal Truncation in Experimental Modal Analysis

    Tarpø, Marius / Vigsø, Michael / Brincker, Rune | British Library Conference Proceedings | 2018