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1. 发明授权

US6084205A Method for enhanced control of welding processes 失效
标题翻译：加强焊接工艺控制的方法
公开(公告)号：US6084205A
公开(公告)日：2000-07-04
申请号：US818091
申请日：1997-03-14
申请人： Donald A. Sheaffer , Ronald F. Renzi , David M. Tung , Kevin Schroder
发明人： Donald A. Sheaffer , Ronald F. Renzi , David M. Tung , Kevin Schroder
IPC分类号： B23K9/095
CPC分类号： B23K9/0956
摘要： Method and system for producing high quality welds in welding processes, in general, and gas tungsten arc (GTA) welding, in particular by controlling weld penetration. Light emitted from a weld pool is collected from the backside of a workpiece by optical means during welding and transmitted to a digital video camera for further processing, after the emitted light is first passed through a short wavelength pass filter to remove infrared radiation. By filtering out the infrared component of the light emitted from the backside weld pool image, the present invention provides for the accurate determination of the weld pool boundary. Data from the digital camera is fed to an imaging board which focuses on a 100.times.100 pixel portion of the image. The board performs a thresholding operation and provides this information to a digital signal processor to compute the backside weld pool dimensions and area. This information is used by a control system, in a dynamic feedback mode, to automatically adjust appropriate parameters of a welding system, such as the welding current, to control weld penetration and thus, create a uniform weld bead and high quality weld.
摘要翻译：一般来说，在焊接工艺中生产高品质焊缝的方法和系统，以及气体钨丝（GTA）焊接，特别是通过控制焊缝穿透。从焊接池发出的光在焊接期间通过光学装置从工件的背面收集，并且在发射的光首先通过短波长通过滤光器以去除红外辐射之后被传送到数字摄像机进行进一步处理。通过滤出从背面焊池图像发射的光的红外分量，本发明提供了焊池边界的准确确定。来自数码相机的数据被馈送到成像板，该成像板聚焦在图像的100×100像素部分上。板执行阈值操作，并将该信息提供给数字信号处理器，以计算背面焊池尺寸和面积。该信息由控制系统以动态反馈模式用于自动调整焊接系统的适当参数，例如焊接电流，以控制焊接穿透，从而创建均匀的焊道和高质量的焊缝。

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