排序方式: 共有69条查询结果,搜索用时 15 毫秒
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In this paper an automatic visual method of seam recognizing and seam tracking based on textural feature matching was proposed,in order to recognize the weld of multi-layer or multi-pass welding in which the weld is difficult to be recognized by conventional visual methods.This method focuses on the obvious difference of image textural feature between the weld region and the base metal region,as well as the similarity of the textural features along the welding direction.The method consists of the following steps: setting image template and choosing the edge region as ROI (region of interest),extracting the image textural feature of the template and the edge region,feature matching,and recognition of weld region.Experiment showed that the method proposed was effective for weld seam recognition in multi-layer welding. 相似文献
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7月22日至23日,海峡两岸档案暨缩微学术交流会在北京召开。参加本次学术交流会的台湾代表团一行共28人,于21日下午抵达北京首都机场。
两岸学术交流会于7月22日在中国科技会堂正式开幕。国家档案局局长杨冬权,国家档案局副局长、中国档案学会理事长李和平,国家图书馆副馆长、中国文献影像技术协会理事长魏大威,台湾中华档案暨资讯缩微管理学会理事长杨正宽和名誉理事长曹尔忠等出席开幕式并讲话, 相似文献
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为了同时实现钨极惰性气体保护焊(GTAW)中弧长控制和焊缝跟踪,文中提出一种基于钨极倒影的焊缝位置检测新方法.该方法将所研制的视觉传感器固接于焊枪上,从侧前方观测熔池,拍摄得到的图像包含有钨极前端、熔池前部、焊缝棱边以及钨极在熔池中所成的像等元素.通过所提出的基于实际钨极中心线约束的弧长算法和基于熔池水平约束的钨极左右偏差算法,计算得到焊缝相对钨极的三维位置,以此为控制量可以实现三维精密焊缝跟踪.结果表明,该方法是有效的,检测精度达到±0.1mm,满足精密焊接应用要求. 相似文献
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