3D vibrations reconstruction with only one camera
| Autor: | Franck Renaud, Jean-Luc Dion, Adrien Goeller, Stefania Lo Feudo |
|---|---|
| Přispěvatelé: | SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA), Laboratoire d'Ingénierie des Systèmes Mécaniques et des MAtériaux (LISMMA), Université Paris 8 Vincennes-Saint-Denis (UP8)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA), Laboratoire QUARTZ (QUARTZ ), Université Paris 8 Vincennes-Saint-Denis (UP8)-Ecole Nationale Supérieure de l'Electronique et de ses Applications (ENSEA)-SUPMECA - Institut supérieur de mécanique de Paris (SUPMECA)-Ecole Internationale des Sciences du Traitement de l'Information (EISTI) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Computer science Acoustics Aerospace Engineering 02 engineering and technology 01 natural sciences 020901 industrial engineering & automation [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing Normal mode Linearization Deflection (engineering) 0103 physical sciences 010301 acoustics Civil and Structural Engineering [PHYS.MECA.VIBR]Physics [physics]/Mechanics [physics]/Vibrations [physics.class-ph] Mechanical Engineering Time evolution ACM: I.: Computing Methodologies/I.4: IMAGE PROCESSING AND COMPUTER VISION/I.4.5: Reconstruction/I.4.5.0: Series expansion methods [INFO.INFO-CV]Computer Science [cs]/Computer Vision and Pattern Recognition [cs.CV] Finite element method Computer Science Applications Vibration Amplitude Modal Control and Systems Engineering Signal Processing |
| Popis: | In this paper, we propose a new method to measure the vibrations of a 3D mechanical structure. It requires only a video sequence taken by a single camera and a Finite Element model of the structure. First, the intrinsic and extrinsic parameters of the camera are identified. Then, a collection of numerical deflection shapes and normal modes are projected in the image frame of the camera. This is done thanks to a linearization of the perspective projection model. Comparing the motion of targets seen by the camera and the motion of Finite Element model at the same location gives the time evolution of modes amplitude. Finally the motion of the model is reconstructed in 2D in the image frame and in 3D in the world frame. By following this procedure, vibration amplitude can be magnified applying a scale factor on a modal basis covering a large frequency bandwidth. A video graphical abstract can be found on youtube, see [1].This paper is the preprint of the MSSP article that can be found at https://doi.org/10.1016/j.ymssp.2021.108032 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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