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研究生: 張育銓
Chang, Yu-Chuan
論文名稱: 工件自動化辨識與檢測系統
Workpiece Automatic Identification and Inspection System
指導教授: 陳響亮
Chen, Shang-Liang
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 製造資訊與系統研究所
Institute of Manufacturing Information and Systems
論文出版年: 2016
畢業學年度: 104
語文別: 中文
論文頁數: 69
中文關鍵詞: 工件辨識工件檢測Pallet Pool System影像處理Harris Corner Detector
外文關鍵詞: Workpiece Identification, Workpiece Inspection, Pallet Pool System, Image Processing, Harris Corner Detector
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  • 本論文旨在自動化工件辨識與檢測技術應用於多工作台(Pallet Pool System,PPS)自動化生產機台,以改善人為疏失對於機台生產線的干擾,並減少其人力需求。研究中針對多工作台自動化生產機台為情境,進行設計並提出基於電腦視覺的兩大機制:(1)在加工前確認此工件是否為加工目標,(2)在加工後確認加工的正確性,並另外規劃與設計CNC機台與電腦自動化連線流程。
      研究中主要以工件型號辨識與加工程序檢測為主軸,首先使用者擷取加工前與加工後的標準件影像,做為加工前模板影像與加工後模板影像並儲存至模板影像資料庫。工件型號辨識中,在加工前擷取實際影像,與加工前模板影像進行特徵點匹配,並評估匹配結果。加工程序檢測中,在加工後採用參考件比較法,比較加工後模板影像與加工後工件影像之間的差異,檢測出工件的瑕疵部位。此外研究中亦建置系統人機介面,提供使用者了解辨識與檢測狀況。
      實驗中,採用數位相機擷取工件影像,在離線狀態下對工件型號辨識與加工程序檢測進行時間與準確度之測試,並另外模擬斷刃殘留、鑽孔加工失敗等兩種狀況,評估加工程序檢測的效果。在機台與電腦自動化連線部份,則以網路攝影機進行流程測試。
      本研究主要貢獻,分述以下三點如下:1.導入工件型號辨識,避免上料時錯放工件。2.導入加工程序檢測,提供機台自動檢測加工正確性,以減少工件檢測時的人力需求。3.規劃與設計機台與電腦自動化連線,賦予機台自動化辨識與檢測之功能。

    PPS (Pallet Pool System) automatic production line is a highly automatic loading system which integrates CNC machine tool and storage areas. To prevent the PPS automatic production line from operator errors, a vision-based identification and inspection system for PPS automatic production line is presented in this research. Two main functions are developed: 1. A feature-based identification method is proposed to identify whether the workpiece matches machining mission before machining. 2. A Reference Matching inspection method is used to compare template image and workpiece image to inspect the defective area on the workpiece after machining. In addition, the design and the planning of automatic connection between a machine tool and a computer are proposed. In the experiment, Webcam was adopted to test information flow of automatic connection. A digital camera was adopted to test the system in an off-line experiment. In this research, three main advantages of this developed system are obtained: 1. Implement workpiece identification to avoid setting a wrong workpiece while loading. 2. Implement workpiece inspection to automatically inspect the machining error and reduce the requirement of manpower. 3. Machine is provided with the function of automatic identification and inspection by the design of automatic connection between a machine tool and a computer.

    摘要 I 誌 謝 VII 目錄 VIII 表目錄 X 圖目錄 XI 第一章 緒論 1 1.1研究背景 1 1.2研究動機 2 1.3研究目的 3 1.4文獻探討 4 1.4.1 工件型號辨識之相關文獻 4 1.4.2 加工程序檢測之相關文獻 6 1.4.3 影像處理方法 7 第二章 研究方法與理論 9 2.1工件型號辨識 10 2.1.1影像前處理步驟 11 2.1.2 Harris 角落點匹配 13 2.1.3 匹配結果評估 18 2.2加工程序檢測 20 第三章 系統與實驗環境架構 29 3.1硬體架構 30 3.2軟體架構 32 3.3 資料庫系統 32 3.4系統情境 33 第四章 系統開發與實現 34 4.1系統人機介面 34 4.2機台與電腦連線規劃 37 第五章 實驗結果與分析 43 5.1工件型號辨識實驗結果與討論 43 5.1.1辨識時間之測試 43 5.1.2辨識準確度之測試 44 5.2加工程序檢測實驗結果與討論 46 5.2.1檢測時間之測試 46 5.2.2切削屑殘留對於檢測之影響 46 5.2.3 鑽孔加工檢測與斷刃殘留檢測之結果 48 第六章 結論與未來研究方向 53 6.1結論 53 6.2未來研究方向 54 附錄A基本影像處理方法介紹 55 附錄B實驗用影像 60 參考文獻 67

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