上海交通大学学报

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (10): 1552-1556.

• 自动化技术、计算机技术 • 上一篇    下一篇


大型系泊链五环长的视觉测量系统

  

  1. （1.上海交通大学 机电设计与知识工程研究所，上海 200240；2.江西科技师范学院 现代教育技术中心，南昌 330013）
  • 收稿日期:2010-11-03 出版日期:2011-10-31 发布日期:2011-10-31
  • 基金资助:

    国家自然科学基金资助项目(50875169)

Visual Measurement System of the Pitch Length of Large Scale Mooring Chains’ Five Neighboring Links

 HU  Wen-1, HU  Chun-2, WANG  Shi-Gang-1   

  1. (1. Institute of Electromechanical Design and Knowledge Based Engineering,Shanghai Jiaotong University, Shanghai 200240, China; 2. Center for Educational Technology，Jiangxi Science and Technology Normal University, Nanchang 330013, China)
  • Received:2010-11-03 Online:2011-10-31 Published:2011-10-31

摘要： 为了测量大型三维复杂形状工件系泊链的五环长，研究了基于相机基线长度的测量方法，利用相机主点在成像过程中的特殊性，将五环长测量任务转化为分别测量相机的基线长度和五环的左右边缘相对于所在相机主点的水平距离；提出了链条边缘提取算法和五环长测量算法.实验表明，该系统能准确地提取链条边缘并且计算五环长，相对误差小于0.2%，满足使用要求.
 

关键词: 系泊链, 基线长度, 主点, 边缘提取, 视觉测量系统

Abstract: A visual measurement method based on the baseline length of cameras was presented to measure the pitch length of five neighboring links of large scale three dimensional mooring chains with complex shape. The task is separated into two subtasks, including calibrating the baseline length of neighboring cameras and the horizontal distances between the five neighboring links’ edges and the principal point of the corresponding camera. The edge detection method and visual measurement method of five neighboring links were proposed. The experimental results show that the system can detect the edges precisely, and compute the pitch length with the relative error less than 0.2%, satisfying application requirements.

Key words: baseline length, principal point, edge detection, vision measurement system, mooring chains

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