激光熔覆过程中熔池图像的实时检测

建立了基于CCD摄像机的激光熔覆过程检测系统，得到熔池的动态变化过程。从动态视频中读取每祯数字图像，获得稳定的熔池区图像。对熔池图像处理的算法进行研究，得到清晰准确的熔池形貌边缘;提取熔池中心，得到单道熔覆层熔池的相对高度变化，能够近似表征沉积表面的起伏。在图像采集卡与计算机图像处理单元互相通信和采集软件模块的基础上进行连续视频图像实时处理程序的开发，在0.2 s内完成对图像的采集处理工作，为获得精确的熔池位置偏差和激光熔覆过程控制提供了检测基础。

Realtime Monitoring Research of Melt Pool Images in Laser Cladding Process

A laser cladding process monitoring system was set up based on CCD camera, dynamic behavior of melt pool can be acquired as a video form through the system. The melt pool's digital image is read from the video frame by frame and the steady melt pool area can be obtained. A kind of algorithm was studied and implemented. This algorithm can get the clear melt pool's contour and centroid. Jointed each pool's centroid of the single pass, a relative height curve is formed, and it can approximately describe the deposition's surface. On the basic of the communication between the image collection card and the computer image process cell, a realtime consecutive image process software was developed. The software can accomplish the image collection and process within 0.2 s. These are monitoring elements for finding the actual melt pool position and further laser cladding process close-loop control.