基于图像处理的轮辐角度测量

Spoke-Angle Measurement with Image Processing

针对轮毂在进行X射线探伤前需要预先调整轮毂轮辐位置的问题,利用图像处理的方法实现了轮毂轮辐初始角度的测量。首先用霍夫变换去除轮毂圆之外的干扰信息。然后根据轮辐条数,在轮毂模板图像上设定一个标准扇形检测区域,在待检轮毂上转动检测区域,用灰度比较法计算出角度。实验结果表明,该方法能较好地测量轮毂轮辐初始角度,符合工业要求。

The spoke position of a wheel needs to be adjusted before the wheel-flaw detection by X-Ray machine.A method based on image processing is proposed for initial angle measurement of the spoke.Firstly,the Hough transformation is used to remove the interference information outside the wheel-circle,and then a sector sample of detection area is set on the wheel pattern image according to the number of the spokes.Finally,the tested sector detection area on the wheel is rotated,and the angle is calculated by comparing the gray scale.Experimental results show that the method can measure the initial angle of the spoke,which meets the industrial requirements.