基于二维图像直线标定的接触网几何参数测量方法

Measurement Methods of OCS Geometric Parameters by Linear Staking based on Two-dimensional Images

利用列车车顶摄像机拍摄的弓网受流视频图像,采用计算机视觉方法测量接触网导高和拉出值,提出一种操作方便且不受摄像机角度约束的二维空间标定方法对受电弓滑板垂直运动平面进行标定,给出基于Hough变换的滑板边缘和接触线识别方法,计算滑板与接触线接触点的图像坐标,再通过坐标变换获得接触线实际高度和拉出值。经实际检测数据验证,该方法具有一定可行性和准确性。

By application of video and images taken from the train roof mounted video camera and measurement of contact wire heights and staggers by use of computer vision method,a two-dimensional staking method,which is ease for operation and not liable to suffer from restriction of video camera angle,is used for staking of vertical movement plane of pantograph collector strip,proposing a method for identification of the strip edge and contact wire on the basis of Hough transformation,calculating the image coordinate of contact point between strip and contact wire,and obtaining the actual height and stagger of the contact wire by transformation of the coordinate;with verification of the actual inspection data,the method shows certain feasibility and accuracy.