Please use this identifier to cite or link to this item:
https://doi.org/10.1364/AO.43.004164
DC Field | Value | |
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dc.title | Instantaneous velocity displacement and contour measurement by use of shadow moiré and temporal wavelet analysis | |
dc.contributor.author | Tay, C.J. | |
dc.contributor.author | Quan, C. | |
dc.contributor.author | Fu, Y. | |
dc.contributor.author | Huang, Y. | |
dc.date.accessioned | 2014-06-17T06:24:41Z | |
dc.date.available | 2014-06-17T06:24:41Z | |
dc.date.issued | 2004-07-20 | |
dc.identifier.citation | Tay, C.J., Quan, C., Fu, Y., Huang, Y. (2004-07-20). Instantaneous velocity displacement and contour measurement by use of shadow moiré and temporal wavelet analysis. Applied Optics 43 (21) : 4164-4171. ScholarBank@NUS Repository. https://doi.org/10.1364/AO.43.004164 | |
dc.identifier.issn | 00036935 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/60559 | |
dc.description.abstract | A temporal wavelet analysis method is proposed for velocity, displacement, and three-dimensional surface-profile measurement of a continuously deforming object by use of the shadow moiré technique. A grating is placed close to a deforming object, and its shadow is observed through the grating. The moiré fringe patterns, generated by the interference of the grating lines and their shadows, are captured by a high-speed COD camera with a telecentric gauging lens. Instantaneous frequency of gray-value variation is evaluated point by point with the continuous wavelet transform. From the instantaneous frequency of each point on the object, the velocity, displacement, and high-quality surface profile at different instants can be retrieved. In this application, two specimens are tested to demonstrate the validity of the proposed method: One is a small coin with a rigid body motion, and the other is a simply supported beam subjected to a central point load. The results are compared with those obtained from temporal Fourier-transform and mechanical stylus methods. © 2004 Optical Society of America. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1364/AO.43.004164 | |
dc.source | Scopus | |
dc.type | Article | |
dc.contributor.department | MECHANICAL ENGINEERING | |
dc.description.doi | 10.1364/AO.43.004164 | |
dc.description.sourcetitle | Applied Optics | |
dc.description.volume | 43 | |
dc.description.issue | 21 | |
dc.description.page | 4164-4171 | |
dc.description.coden | APOPA | |
dc.identifier.isiut | 000222898600007 | |
Appears in Collections: | Staff Publications |
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