Still-Camera Based 3D Experimental Modal Analysis University of Ljubljana

Format:

Book

Conference/Event

Author/Creator:

Gorjup, Domen, author.

Contributor:

Boltežar, Miha

Slavic, Janko

Conference Name:

Noise and Vibration Conference & Exhibition (2021-09-07 : Grand Rapids & Online, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

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

Notes:

Vendor supplied data

Publisher Number:

2021-01-1092

Access Restriction:

Restricted for use by site license