钢轨轮廓测量基准对齐和重采样方法研究  

Study on datum alignment and resampling method of rail profile measurement

作　　者：占栋 景德炎 吴命利[2] 于龙[3] 刘兰 Zhan Dong;Jing Deyan;Wu Mingli;Yu Long;Liu Lan(China Railway Economic and Planning Research Institute, Be~iing 100038, China;School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China;School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China;Guangzhou Metro Group Co., Ltd., Guangzhou 510220, China)

机构地区：[1]中国铁路经济规划研究院,北京100038 [2]北京交通大学电气工程学院,北京100044 [3]西南交通大学电气工程学院,成都610031 [4]广州地铁集团有限公司,广州510220

出　　处：《仪器仪表学报》2018年第2期149-159,共11页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(61134001,51177137);国家重点研发计划(2017YFB1201202);中国铁路总公司科技研究开发计划(2014G008-C);中国铁路经济规划研究院基金(2017BSH02)项目资助

摘　　要：钢轨廓形（轨廓）是表征钢轨服役性态的重要特征,与列车运行安全息息相关。随着铁路提速,对钢轨外形和表面质量要求提高。如何精确描述钢轨形态特征是钢轨精细化维护面临的突出问题。在分析轨廓测量原理和现状的基础上,对轨廓基准对齐、数字化建模方法进行研究。针对轨廓不同区域曲率差异大、测量分辨率不统一,提出采用极坐标系下等角度分布原则,对轨廓进行数字化建模和重采样处理,建立设计轨廓与测量轨廓空间一一映射关系。详细分析轨廓不同区域特征,提出采用轨廓侧面控制旋转,顶面纵向分量和侧面横向分量控制平移,顶面和侧面交叉迭代直至收敛的优化方法,实现测量轨廓与设计轨廓精确对齐。为验证方法有效性,将所提方法进行试验应用,通过非接触式与接触式轨廓测量数据对比,验证所提方法切实可行。Rail profile is an important index to indicate rail service status and closely related with railway transportation safety. Since the running speed of train is improving,higher quality is required for the rail shape and surface. To accurately evaluate rail profile quality and describe its characteristics are the key issues in the rail maintaining. The datum alignment and digital modeling in rail profile measurement is studied based on the analysis of measurement principle and situation. Considering the curvature difference in the designed rail profile（ DRP） and the resolution difference in the measuring rail profile（ MRP）,the principle of equal angle interval in the polar coordinate system is applied into the DRP digital modeling and MRP resampling to establish the mapping relationship between the DRP and MRP. The characteristics of the DRP and MRP are analyzed in detail. To realize the datum accurate alignment,the MRP side face is presented to control rotation,and the top face longitudinal component and the side face transverse component are presented to control the translations. Then,the two components are computed with cross iteration until the results convergence. The proposed method is tested and applied onsite to demonstrate its effectiveness by comparing the non-contact and contact rail measurement data.

关 键 词：钢轨 轮廓 基准对齐 重采样 数字建模 

分 类 号：U216.3[交通运输工程—道路与铁道工程] TH873.7[机械工程—仪器科学与技术]