作者：董庆仑, 尧辉明, 翟字波

作者单位：上海工程技术大学，上海 201620

关键词：钢轨波磨;区域动态检测;弦测法;ICP算法;结构光

摘要：

随着传统波磨动态检测弦测算法的改进，轨顶中线处波磨曲线的提取精度逐渐提高，但钢轨波磨是一种不规则的空间曲面，单一条波磨曲线不足以完整反映真实的波磨信息。由此，文章提出一种钢轨波磨区域曲面动态检测方法，以实现轨顶中线区域波磨曲面的准确还原。所提检测方法运用点线结合的测量方式，将结构光技术与传统中点弦测法结合所得精确测量点波磨值与其未被磨损一侧轮廓点集作为参考点，以标准钢轨轮廓作为点云轮廓算法ICP（iterative closest points）配准基准，有效避免迭代过程中局部最优解的出现。实验室条件下实现轨顶中线±10 mm范围内波磨曲面检测，拓展波磨的检测范围，满足测量精度要求，证明所提动态波磨检测方式是一种可行的区域波磨曲面复原方法。

Research on dynamic detection method of rail corrugated surface based on improved ICP algorithm
DONG Qinglun, YAO Huiming, ZHAI Zibo
Shanghai University of Engineering Science, Shanghai 201620, China
Abstract: With the improvement of the traditional corrugation dynamic detection string measurement algorithm, the accuracy of the corrugation curve extraction at the center line of the rail top is gradually improved, but the rail corrugation is an irregular spatial surface, and a single corrugation curve is not enough to reflect the truth. Therefore, the article proposes a dynamic detection method for the surface of the corrugated area of the rail to realize the accurate restoration of the corrugated surface in the centerline area of the rail. The proposed detection method uses a point-line combined measurement method, combining structured light technology and midpoint chord measurement to obtain the measurement point corrugation value and the set of contour points on the side that is not worn as the reference point, and the standard contour is used as the point cloud contour algorithm ICP (iterative closest points) registration benchmark to avoid the emergence of local optimal solutions in the iterative process. Under laboratory conditions, the corrugated surface within the range of ±10 mm from the center line of the rail top is restored, which expands the detection range of corrugation and meets the measurement accuracy requirements, which proves that the proposed dynamic corrugation detection method is a feasible method for restoration of regional corrugated surfaces.
Keywords: rail corrugation;regional dynamic detection;chord-based measuring method;ICP algorithm;structured light
2022, 48(3):9-14,20  收稿日期: 2020-12-23;收到修改稿日期: 2021-02-13
基金项目: 国家自然科学基金资助项目（51975347）
作者简介: 董庆仑（1994-），男，山东济南市人，硕士研究生，专业方向为轨道车辆状态检测及诊断技术
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