Still-Camera Based 3D Experimental Modal Analysis
- Delivery
- Provide download link
- Format
- Price
- Non-members (tax incl.)：￥6,600 Members (tax incl.)：￥5,280
- Paper/Info type
- SAE Paper
No.2021-01-1092
- Pages
- 1-6(Total 6 p)
- Date of publication
- Aug 2021
- Publisher
- SAE International
- Language
- English
- Event
- Noise and Vibration Conference & Exhibition
Detailed Information
| Author(E) | 1) Domen Gorjup, 2) Janko Slavic, 3) Miha Boltežar |
|---|---|
| Affiliation(E) | 1) University of Ljubljana, 2) University of Ljubljana, 3) University of Ljubljana |
| Abstract(E) | 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. |
