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dc.contributor.author陳思翰en_US
dc.contributor.authorChen, Ssu-Hanen_US
dc.contributor.author彭德保en_US
dc.contributor.authorPerng, Der-Baauen_US
dc.date.accessioned2014-12-12T01:25:37Z-
dc.date.available2014-12-12T01:25:37Z-
dc.date.issued2009en_US
dc.identifier.urihttp://140.113.39.130/cdrfb3/record/nctu/#GT079533813en_US
dc.identifier.urihttp://hdl.handle.net/11536/41294-
dc.description.abstract由於內螺紋(Internal Thread)特殊的結構與空間位置的限制,目前尚未發現以機器視覺為基礎的內螺紋檢測機台。本研究發展一套光學螺紋塞規(Optical Thread Plug Gauge,OTPG),可對內螺紋工件進行非接觸式的自動化檢測。OTPG乃以硬式工業內視鏡(Rigid Industrial Endoscope)及電荷耦合元件(Charge Coupled Device,CCD)組成取像光學模組,並透過觸發器(Trigger)與兩組馬達控制單元(Motion Control Unit)搭配,逐步拼貼連續拍攝到的部分螺紋影像,以重建出360度內螺紋壁的二維全周影像圖(Unwrapped Image),接著,運用影像處理技術、以離散餘弦轉換(Discrete Cosine Transformation,DCT)為基礎之影像還原技術進行影像正規化、影像切割與瑕疵突顯。OTPG可偵測出螺紋坡(Flank)上凸起狀的刮痕(Scratch),以及螺峰(Crest)或螺谷(Root)上凹陷狀的崩塌(Collapse)或裂痕(Flaw)。zh_TW
dc.description.abstractThis dissertation is to design and develop a novel optical thread plug gauge (OTPG) for internal thread inspection using machine vision. The OTPG is composed of a rigid industrial endoscope, a charge-coupled device (CCD) camera, and a two degree-of-freedom motion control unit. A sequence of partial wall images of an internal thread are retrieved and reconstructed into a two-dimensional unwrapped image. Then, a digital image processing, discrete cosine transformation-based image restoration scheme is used to normalize image, segment image, and enhance defect of the internal thread. The proposed OTPG provides an orientation-free and convenient method for detecting defects such as scratches, collapses, and flaws in an internal thread.en_US
dc.language.isozh_TWen_US
dc.subject內螺紋zh_TW
dc.subject硬式工業用內視鏡zh_TW
dc.subject電腦視覺zh_TW
dc.subject條狀性紋理zh_TW
dc.subject離散餘弦轉換zh_TW
dc.subject影像還原zh_TW
dc.subjectinternal threaden_US
dc.subjectrigid industrial endoscopeen_US
dc.subjectmachine visionen_US
dc.subjectdirectional textureen_US
dc.subjectdiscrete cosine transformen_US
dc.subjectimage restorationen_US
dc.title以機器視覺為基礎之內螺紋自動檢測系統zh_TW
dc.titleAutomated Internal Thread Inspection System Using Machine Visionen_US
dc.typeThesisen_US
dc.contributor.department工業工程與管理學系zh_TW
Appears in Collections:Thesis


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