Por favor, use este identificador para citar o enlazar este ítem:
http://cio.repositorioinstitucional.mx/jspui/handle/1002/537| FRINGE PROJECTION METHOD FOR TOPOGRAPHY AND DYNAMIC DEFORMATION MEASUREMENT | |
| ANDREA LEON HUERTA | |
| Amalia Martinez-Garcia | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| STRESS-STRAIN, MOIRÉ, FRINGE PROJECTION, PHASE MEASUREMENT, OUT-OF-PLANE DEFORMATION, SPHEROMETER | |
| "The thesis deals with the application of the fringe projection method for topography and dynamic deformation measurement. In the first part, we present an analysis of the influence of the grating period used in fringe projection technique for topography measurement. The algorithm used to the processing of the fringe images is phase shifting technique. Most phase shifting algorithms are developed for a signal without harmonics, i.e., a perfect sinusoidal signal. When they are used for phase detection of a nonsinusoidal signal there is an error in the results. In order to determine the grating period influence, sinusoidal fringes with different pitch are projected on a semi-spherical object. It is observed that some fringe patterns captured by the CCD camera have nonsinusoidal profile. These fringes are used to retrieve the surface topography. An error is evaluated by the comparison of the results with a reference surface which it was measured with the spherometer. In the second part, it realized a monitoring by fringe projection technique of the deformation in sheet metal samples during a tensile test. Since it is a dynamic event, the use of Fourier transform method allows us to measure in real-time the deformation of the sample respect to its initial state, i.e., before applying the load. It is showed that the resolution of fringe projection technique is enough to detect the transition zone to predict failure. Study of material behavior is important due to the development of new materials that can exhibit an unexpected behavior." | |
| 2008-12 | |
| Tesis de maestría | |
| Inglés | |
| León, Guanajuato | |
| Público en general | |
| León Huerta, (2008). "Fringe projection method for topography and dynamic deformation measurement". Tesis de Maestría en Ciencias (Óptica). Centro de Investigaciones en Óptica, A.C. León, Guanajuato. 77 pp. | |
| ÓPTICA | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | MAESTRIA EN CIENCIAS (ÓPTICA) |
Cargar archivos:
| Fichero | Tamaño | Formato | |
|---|---|---|---|
| 13169.pdf | 3.53 MB | Adobe PDF | Visualizar/Abrir |