振动数据反演的路面光纤阵列坐标映射方法  

The Fibre Arrays Coordinate Mapping Method for Pavement Using Vibration Data

作　　者：郭牧 边泽英 GUO Mu;BIAN Zeying(Key Laboratory of Road and Traffic Engineering of the Ministry of Education,Tongji University,Shanghai 201804,China)

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《交通科技》2024年第5期40-45,共6页Transportation Science & Technology

摘　　要：为准确获取光纤阵列监测下路面振动加速度的时空多维分布数据,需保证阵列单元坐标与光纤测点映射关系的准确性,以实现评价路面结构服役性能与提取车辆荷载信息的目的。典型正向推演方法存在映射可靠性难以提升的问题,研究通过实测振动数据特征评价阵列单元映射组合的响应相似性,以蒙特卡洛模拟得到极大似然估计的阵列单元映射组合,实现光纤阵列单元坐标的精确反演。实测验证结果表明,经本方法输出的振动数据在断面相位标准差满足振动特征计算窗长0.04 s约束,较传统方法提升显著。研究方法及结果为光纤阵列振动感知方法在路面性能评价和交通荷载信息监测中的推广提供基础。In order to accurately obtain the spatial and temporal multidimensional distribution data of pavement vibration under the monitoring of fibre-optic arrays,it is necessary to ensure the accuracy of the mapping relationship between the coordinates of fibre-optic arrays and fibre-optic measurement points,so as to achieve the purpose of investigating the vibration state of the pavement and the extraction of loading characteristics.In order to make up for the problem that it is difficult to improve the mapping reliability of the traditional forward deduction method,the study evaluates the response similarity of the array unit mapping combinations through the measured vibration data features,and obtains the array unit mapping combinations with great likelihood estimation by Monte Carlo simulation to achieve the accurate inversion of fibre-optic array unit coordinates.The measured validation results show that the standard deviation of the vibration data output by this method is less than 0.04 s in the cross-section phase,which is a significant improvement over the traditional method.The research method and results provide a solid foundation for the promotion of the vibration array sensing method based on distributed optical fibre technology in production applications.

关 键 词：道路工程 分布式光纤技术 路面振动阵列感知 阵列坐标映射 蒙特卡洛模拟 

分 类 号：U416.221[交通运输工程—道路与铁道工程]