中国机械工程 ›› 2013, Vol. 24 ›› Issue (3): 290-294,301.

• 机械基础工程 • 上一篇    下一篇

QFP芯片外观视觉检测系统及检测方法

郑金驹;李文龙;王瑜辉;罗明成   

  1. 华中科技大学数字制造装备与技术国家重点实验室,武汉,430074
  • 出版日期:2013-02-10 发布日期:2013-02-27
  • 基金资助:
    国家自然科学基金资助项目(50835004,50975112);中央高校基本科研业务费资助项目(2012QN251)
    National Natural Science Foundation of China(No. 50835004,50975112);
    Fundamental Research Funds for the Central Universities( No. 2012QN251

QFP Chip Visual Inspection System and Its Inspection Method

Zheng Jinju;Li Wenlong;Wang Yuhui;Luo Mingcheng   

  1. State Key Laboratory of Digital Manufacturing Equipment & Technology,Huazhong University of Science and Technology,Wuhan,430074
  • Online:2013-02-10 Published:2013-02-27
  • Supported by:
     
    National Natural Science Foundation of China(No. 50835004,50975112);
    Fundamental Research Funds for the Central Universities( No. 2012QN251

摘要:

基于QFP芯片的管脚外观检测的需要,开发了基于机器视觉的QFP芯片外观检测系统,并简要介绍了该系统的硬件系统和软件系统。为实现管脚外观检测要求,采用Canny算子边缘检测算法针对QFP管脚的图像进行处理,着重论述了管脚栈高的检测方法及基于三点法的管脚共面度的检测方法。测试结果表明,该外观检测系统能达到在线生产的工艺要求。

关键词: QFP外观检测, 机器视觉, Canny算子, 三点法

Abstract:

In order to inspect the appearance of QFP chip lead, an automatic inspection system based on machine vision was designed. Hardware structure and software system were introduced herein. In the software system, Canny algorithm was successfully applied to detect the edge of the QFP chip lead. After that, the inspection method of standoff and the detecting method based on three-point seating plane of co-planarity were discussed. Finally, the testing experiments with respect to the QFP chip visual inspection system were carried out, which achieves satisfactory results.

Key words: QFP visual inspection, machine vision, Canny algorithm, three-point seating plane method

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