基于线特征跟踪的铁路桥梁支座振动位移测量方法  

Vibration displacement measurement method for railway bridge support based on line feature tracking

作　　者：闫朝勃 赵维刚[2] 王保宪[2] 李义强[2] YAN Zhaobo;ZHAO Weigang;WANG Baoxian;LI Yiqiang(School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Safety Engineering and Emergency Management,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学机械工程学院,石家庄050043 [2]石家庄铁道大学安全工程与应急管理学院,石家庄050043

出　　处：《铁路计算机应用》2022年第1期15-21,共7页Railway Computer Application

基　　金：国家自然科学基金资助项目(51808358,U2034207,51978423);国家能源投资集团有限责任公司科技创新项目(SHGF-15-41);河北省重点研发计划项目(19210804D);河北省高等学校科学技术研究项目(BJ2020057)。

摘　　要：针对现有基于结构物表面纹理特征跟踪的支座振动位移测量算法易受光照、背景杂波、运动模糊等因素干扰的问题,提出一种基于线特征跟踪的铁路桥梁支座振动位移测量方法。利用大津法与连通体分析法获取感兴趣目标,并基于感兴趣目标确定线跟踪区域,提高支座位移计算效率;利用一种直线鲁棒检测算子,快速提取桥梁支座振动过程中线跟踪区域中的线目标坐标变化;采用一种多帧数据融合滤波器,对桥梁支座振动位移数据进行后处理,从而实现对桥梁支座振动位移的精准计算。将该测量方法应用于实际搭建的桥梁支座振动位移监测系统中,应用结果表明,该方法在测量精度上取得较好结果,满足桥梁结构健康监测需求。Aiming at the problem that the existing support vibration displacement measurement algorithm, which is based on surface texture feature tracking of structures, easily disturbed by lighting, background clutter, motion blur and other factors, this paper proposed an accurate measurement method for railway bridge support vibration displacement based on line feature tracking. In order to improve the calculation efficiency of the support displacement, the paper obtained the target of interest by using Otsu method and continuum analysis method, and determined the line-tracking area based on the target of interest, enhanced the calculation efficiency of support displacement;used a linear robust detection operator to quickly extract the coordinate changes of the line-tracking area during the bridge support vibration;used the fusion filter to post-process the bridge support vibration displacement data and finally implement the accurate calculation of the bridge support vibration displacement. The measurement method was applied to the actual bridge support vibration displacement monitoring system. The application results show that the method achieves good results in measurement accuracy and meets the needs of bridge structure health monitoring.

关 键 词：位移测量 线特征提取 线段检测算法 连通体分析 桥梁支座 

分 类 号：U243.36[交通运输工程—道路与铁道工程] TP39[自动化与计算机技术—计算机应用技术]