提出一种激光扫描自动测量轮对几何参数的方法。传统方法将某一特定位置测量的踏面轮廓与标准轮廓进行比较，进而测量出各个参数；该方法采用两个线结构光视觉传感器对轮对进行三维扫描，通过计算机对点云数据进行处理，计算出直径、轮缘厚、踏面磨耗以及轮辋宽等参数，对线结构光视觉传感器与轮对的相对位置和姿态没有严格要求，提高了测量精度。实验结果证明了方法的可行性。

A method for automatically measuring wheel geometric parameters by laser scanning is presented. The running surface of wheel is scanned by the line structured light vision sensors, and the geometric parameters including wheel diameter, flange thickness, tread wear and rim width are calculated after processing the point cloud. This is different from the traditional methods which measures the geometric parameters by comparing a measured profile to the standard profile of wheel tread.This method is not strict with the relative position between the line structured light and the wheel. The feasibility of this method is demonstrated by experimental results.