标题: | 隐形眼镜自动光学检测系统之设计与开发 Design and Development of an AOI System for Contact Lenses |
作者: | 吴志凌 Chih-Lin Wu 彭德保 Der-Baau Perng 工业工程与管理学系 |
关键字: | 机器视觉;自动光学检测;隐形眼镜;瑕疵检测;Machine Vision;Auto optical inspection;Contact lenses;Defects inspection |
公开日期: | 2007 |
摘要: | 隐形眼镜镜片是一大量生产工业,每个制造的程序需要作业员用手操作处理再以人工目视检测挑出瑕疵镜片,以过滤不良品,并判断其为具有何种瑕疵之坏片,因此人工目视检测将渐不敷使用。 本研究针对隐形眼镜生产及包装过程中需要检验的部分,设计开发出自动化光学检测(Automatic Optical Inspection, AOI)系统,主要检测功能分为包装机缺片检测(8Cups, 2x4个塑胶容器杯)、人工装填线缺片检测(32Cups, 4x8个塑胶容器杯)、以及单一镜片品质(瑕疵)检测。其中镜片瑕疵项目有破片、边不良、伤痕、破洞,以及P点等。本论文设计并实作出适当的光源与取像模组机构,配合自行开发之AOI软体演算法,架构出完整实用的自动视觉检测系统。 本研究利用塑胶容器杯的特征选取,以区分容器杯中是否缺少隐形眼镜镜片。单一镜片品质(瑕疵)检测项目则先采用快速随机式测圆演算法侦测镜片圆心位置及半径,再利用Blob分析和影像处理方法将瑕疵检测出来。最后实作一检测机台以验证本系统之适用性及有效性。从实验结果显示本论文所研发出之缺片检测暨镜片品质检测机台具有非常高之速度与稳健性,足可应用于隐形眼镜之生产线即时检测。 In general, the manufacture of contact lenses is conventionally labor intensive, requiring manual handling and inspection of the cast lens during production. It results in low efficiency and inaccuracy. This research is to design an AOI (Automatic optical inspection) system, which includes suitable light source, image extraction equipment, and software algorithms, for contact lenses inspection. The mainly focused inspections are missing lens detection and lens defects detection. A prototype of the AOI system for contact lenses inspection is implemented. Experimental results show that the proposed system is robust and fast enough for in-line inspection. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT009433516 http://hdl.handle.net/11536/81624 |
显示于类别: | Thesis |
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