基于视觉传感的焊缝识别方法的研究

文中采用视觉传感的方法实现焊前焊缝中心和间隙的检测.设计了一种基于Roberts梯度和图像清晰度评价函数的自动调焦方法,此方法具有较高的灵敏度,且稳定性好,计算速度快;然后介绍了一种基于垂直测量方案的标定方法,简单实用,能够满足系统的精度要求;最后提出了焊缝图像的一系列处理步骤,包括中值滤波、OTSU法自适应二值化与基于8连通区域标记的孤点滤波算法.实验证明该检测系统能够满足实时性要求,而且有效地提取出焊缝中心位置和间隙大小.

Study of Welding Seam Recognizition Based on Vision Method

This paper applies the vision method to carry out the central position and the gap of the welding seam. Firstly, the author designed an auto-focusing method with the Roberts gradient function. The Roberts gradient function has high sensitivity and focusing scale, good stability, high calculating speed. A simple and practicality demarcate method which is based uprightness measure scheme is introduced. It can satisfy the precision of the system. Finally, this paper put forward a series of processing steps for welding seam images which include median filtering, creating binary image by adaptive threshold and acnode filtering are focused. The experiment results show that the measuring system can satisfy the real time request and effectively pick-up the central position and the gap of the welding seam.