Abstract
Surface shape information is needed for many fast
processes such as structural testing of material,
standing waves on loudspeaker cone, etc. Usually
measurement is done from limited number of points using
electrical sensors or laser distance meters. Fourier
Transform Prolometry (FTP) enables fast shape measurement
of the whole surface. Method is based on angled
sinusoidal fringe pattern projection and image capturing.
FTP requires only one image of the deformed fringe
pattern to restore the 3D shape of the measured object,
which makes real-time or dynamic data processing
possible. In our experiment the method was used for
loudspeaker cone distortion measurement in dynamic
conditions. For sound quality issues it is important that
the whole cone moves in same phase and there are no
partial waves. Our imaging resolution was 1280x1024
pixels and frame rate was 200 fps. Using our setup we
found unwanted spatial waves in our sample cone.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 30th International Congress on High-Speed Imaging and Photonics (ICHSIP30) |
| Editors | Randall T. Paton, Beric W. Skews |
| Place of Publication | Johannesburg |
| Pages | 103-108 |
| Publication status | Published - 2013 |
| MoE publication type | A4 Article in a conference publication |
| Event | 30th International Congress on High-Speed Imaging and Photonics, ICHSIP30 - Pretoria, South Africa Duration: 16 Sept 2013 → 21 Sept 2013 |
Conference
| Conference | 30th International Congress on High-Speed Imaging and Photonics, ICHSIP30 |
|---|---|
| Abbreviated title | ICHSIP30 |
| Country/Territory | South Africa |
| City | Pretoria |
| Period | 16/09/13 → 21/09/13 |
Keywords
- high-speed
- imaging
- shape measurement
- standing waves
- loudspeaker