基于视觉传感的薄板对接焊缝检测方法研究  

Research on Detection Method of Thin Plate Butt Weld SeamBased on Visual Sensing

作　　者：李冰[1] 白云山 赵宽 胡瑞雪[2] 赵占良[3] 宋立军[3] 董玉召 LI Bing;BAI Yunshan;ZHAO Kuan;HU Ruixue;ZHAO Zhanliang;SONG Lijun;DONG Yuzhao(Department of Automation,North China Electricity Power University,Baoding 071000,China;Department of Automotive Engineering,Hebei Jiaotong Vocational Technical College,Shijiazhuang 050035,China;Norendar International Ltd.,Shijiazhuang 050011,China)

机构地区：[1]华北电力大学自动化系,河北保定071000 [2]河北交通职业技术学院汽车工程系,河北石家庄050035 [3]北方工程设计研究院有限公司,河北石家庄050011

出　　处：《热加工工艺》2024年第17期13-19,共7页Hot Working Technology

基　　金：国家自然科学基金联合基金项目重点支持项目(U21A20486);国家自然科学基金项目(61773160)。

摘　　要：为了实现薄板自动对接焊过程中焊缝中心的准确检测,提出了基于主动视觉传感的薄板对接焊缝检测方法。通过对工业相机采集的图像进行颜色分割与亮度分割,消除环境光的干扰;利用轮廓检测与掩模操作消除图像噪声,应用灰度重心法提取激光条纹的中心线,并通过一阶差分方法实现焊缝左右边界及中心的检测。针对激光条纹存在的分断缺陷进行续断连接,以提高焊缝中心检测的准确性。实验结果表明,采用所提方法能够准确检测焊缝边界及中心位置,能够满足薄板对接焊缝的自动焊接需求。In order to achieve the accurate detection of butt weld center during automatic welding of thin plate,a detection method for thin plate butt welding detection based on active visual sensing was proposed.The interference of environmental light was eliminated through color segmentation and brightness segmentation of images collected by industrial camera.The image noise was eliminated by using contour detection and mask operation,and the central line of laser light stripes was extracted by using the gray gravity center method,and the first order differential method was used to achieve the detection of left and right boundaries and weld centers.For segregated defects in laser stripes,interruptions connection was carried out to improve the detection accuracy of the weld center.The results show that using the method can accurately detect the border and center position of the weld seam,and it can meet the automatic welding requirements of thin plate butt weld seam.

关 键 词：焊缝检测 视觉传感 焊缝中心检测 薄板对接焊 

分 类 号：TG409[金属学及工艺—焊接]