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  • Experimental modal analysis on full-field DSLR camera footage using spectral optical flow imaging
    Javh, Jaka ; Slavič, Janko, 1978- ; Boltežar, Miha
    High-speed camera measurements are increasingly being used in modal analysis to instantaneously measure full-field structural responses by extracting the displacement information from images using ... digital-image-correlation and other optical-flow methods. High-speed cameras capable of filming full frame at high frame rates can be very expensive and produce image resolutions of only approximately 1 mega pixel, which is why this research aims at measuring and identifying the full-field response using cheaper, still-frame cameras with a higher image and intensity resolution, such as digital single-lens reflex (DSLR) and mirrorless cameras. Using spectral optical flow imaging (SOFI) full-field operational shapes can be acquired using still-frame cameras. This study demonstrates the hybrid modal-parameter identification of full-field mode shapes using an accelerometer and a DSLR camera for responses far above the DSLR camera's frame rate (demonstrated up to 1kHz).
    Vir: Journal of sound and vibration. - ISSN 0022-460X (Vol. 434, Nov. 2018, str. 213-220)
    Vrsta gradiva - članek, sestavni del
    Leto - 2018
    Jezik - angleški
    COBISS.SI-ID - 16182299

    Povezava(-e):

    https://www.sciencedirect.com/science/article/pii/S0022460X18304905
    DOI

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