基于绿激光图像识别的热态大型锻件长度尺寸测量

摘要

设计了一种热态大锻件长度尺寸测量系统,通过对绿激光扫描锻件过程中各时刻图像进行分析,确定锻件的边缘进而测量锻件的尺寸.首先,由伺服电机带动CCD相机和绿激光器在导轨上移动并实时获得锻件的图像和绿激光线的位置信息,运用图像处理判断绿激光线是否在锻件边缘,确定绿激光线移动到锻件两侧边缘的时刻.然后,记录锻件两侧边缘的位置信息,通过两侧的位置信息得出锻件的尺寸.实验结果表明:该系统最大测量误差小于±2 mm,可以满足锻件尺寸测量的需求.%A length dimension measurement system for large hot forgings is designed.The images of each moment in the process of green laser scanning forgings are analyzed in this system.The dimension of the forging is measured according to the edge informations of forgings.First of all,the CCD camera and the green laser are driven by the motor,the real-time images of forgings and the positional information of laser line is acquired.Then whether the laser line locates on the edge of forgings is judged by image recognition.Secondly,the length dimension of forgings is obtained from recording the position information of both sides of the forging edges.The experimental results show that the maximum measurement error is less than 2 mm.So the method proposed can meet the needs of forging dimension measurement.