| 摘要 |
隨著電腦視覺處理以及電腦運算速度的進步，非接觸式的三維量測系統也持續不斷的進步，也在產業界中逐漸取代接觸式的量測系統，例如許多汽車和手機大廠，都已經將其用於產品外型檢測或是品管方面的應用。故本研究欲發展出一套設備簡單的白光三維非接觸式量測系統，且具有高效率以及正確的量測結果。這套系統利用投影機投射餘弦條紋光置待測物上，並利用單眼數位相機擷取影像，經過相位移法以及三角量測法的運算之後，可解出各像素的壓縮相位值，透過相位重建之後即可獲得連續的相位分佈圖。最後透過相位高度轉換之後，配合座標轉換即可獲得待測物之三維資訊。此外，本研究透過一系列對於
ATOS
白光量測系統的實驗測試之後，了解系統的量測精度與可靠度，也找出此系統的較佳操作方式。透過實驗證實，本研究所提出的量測方式可以提升量測的精度。而在實際應用白光量測系統的過程中，發現數種不易量測的情況，故本研究發展兩套量測輔助設備，第一套為多功能之夾置具，可讓量測過程可以更有效率、更方便。第二套為二氧化鈦氣體噴塗設備，可以解決表面反射率過大或過小之待測物無法量測問題。本文最後會提出數種白光量測系統的實際應用。
關鍵字：相位移法、三角量測法、相位重建、輔助量測設備
With the progress of computer
vision and computing technology, non-contact 3D scanning
measurement system has greatly been improved. In industrial
practice, it gradually replaces contact-typed 3D measuring
system. Many automobile and cell phone plants have already
applied to three-dimensional shape measurement, which serves the
purpose of quality control. This thesis attempts to develop a
set of white light 3D non-contact measurement system, which has
the high measuring efficiency and practical accuracy. This
system projected cosine-curve structured light onto the object
surface by a projector, the image of which is then taken by the
digital single-lens reflex camera. Phase-Shifting Principle and
Triangulation method are applied to find the wrapped phase in
every single pixel, and the phase unwrapping technique is then
used to compute the continuous phase distribution. Finally the
3D profiles of the object can be obtained from the
phase-to-height relationship together with coordinate
transformation. Certain studies were devised with a series of
experiments to optimally apply ATOS, a commercially popular
system, in terms of its accuracy, reliability, and efficient
operation. However, it was found in practice when applying the
white light measuring that some cases were seen to face big
barriers. In dealing with this problem two auxiliary fixtures
were developed in this thesis. The first one is a
multi-functional clamping apparatus, targeted to handle the
measurement thin-walled objects. The other one is a titanium
gas-spray system, which can overcome the problem of measuring
the object with too high or too low reflectivity. Cases study
was also
V performed to validate the usefulness of the white light
measurement system.
Key words: Phase-shifting
principle, Triangulation method, Phases unwrapping
technique, Measurement auxiliary fixtures.
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