Measuring Shape and Surface Strain of Curved Objects Using Digital Speckle Photography and Gap Effect
| العنوان: | Measuring Shape and Surface Strain of Curved Objects Using Digital Speckle Photography and Gap Effect |
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| المؤلفون: | Gunes Uzer, I. B. Krukenkamp, Fu-Pen Chiang |
| المصدر: | Strain. 44:409-416 |
| بيانات النشر: | Wiley, 2008. |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | Surface (mathematics), Gap effect, Materials science, business.industry, Plane (geometry), Mechanical Engineering, Moiré pattern, Grating, Speckle pattern, Optics, Mechanics of Materials, business, Projection (set theory), Digital signal processing |
| الوصف: | There are many 3D shape measurement techniques[1–3]. One of the most commonly used techniques isperhaps the digital projection grating technique [1],whereby a computer-generated sinusoidal grating isprojected onto the surface of a 3D object. The mod-ulation of grating pitch as a result of the height var-iation is used to calculate the shape of the 3D object.Phase shifting is usually adopted to increase the res-olution of the method.The motivation of this study is somewhat different.A few years ago, two of the authors (FPC and IBK)extended the applicability of the digital speckle pho-tography (DSP) technique, that has been used by thefirst author for measuring strain in common engi-neering materials, to measuring strain in the myocar-dium, i.e. the heart muscle [4–11]. However, the DSPtechnique is essentially a plane technique, in that thesurfaceofthespecimenhastobeflat.Asaresult,onlyasmall region of the heart where it is relatively flat canbe mapped by the DSP technique. Thus, in order tomeasure a larger area of the heart, the speckle tech-nique needs to be extended to a curved surface. Fur-thermore, astheheartmoves asawhole whilebeatingit is necessary to find the effect of the rigid bodymovement on the speckle technique’s accuracy. Thisstudy is a first attempt to answer these questions. |
| تدمد: | 1475-1305 0039-2103 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::7f3f3b4c226223a593dcacbf7d9564b1Test https://doi.org/10.1111/j.1475-1305.2008.00479.xTest |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........7f3f3b4c226223a593dcacbf7d9564b1 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14751305 00392103 |
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