基于线特征跟踪的铁路桥梁支座振动位移测量方法

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...

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

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.