摘要
为实现不同型号杆塔结构形变的精确监测,研究基于雷达波相位干涉技术的杆塔结构形变监测方法。差分干涉处理少量合成孔径雷达(synthetic aperture radar,SAR)数据建立多基线干涉纹图集,依据相干系数均值以及点目标检测提取相干目标,建立多基线干涉相位模型从时间域角度迭代处理相干目标干涉相位,采用基于空间搜索的邻近点目标干涉相位差解缠方法求解多基线干涉相位模型,实现相位解缠,利用非线性形变相位与大气延迟相位分离方法提升相干目标线性形变精准性,实现杆塔结构形变监测。结果表明,该方法可实现单筒塔、三筒塔以及角钢塔杆塔结构形变的精确监测,监测精度可达到亚毫米量级,实现杆塔变形状态有效分析。
In order to realize the precise monitoring of the structural deformation of different types of towers,a method for monitoring the deformation of the tower structure based on radar wave phase interferometry is studied.A small amount of synthetic aperture radar(SAR)data is processed by differential interferometry to establish a multi baseline interferogram atlas,extracts coherent targets based on the mean value of coherence coefficients and point target detection,establishes a multi-baseline interferometric phase model to iteratively process the interference phase of coherent targets from a time domain perspective,and uses neighboring points based on spatial search the target interference phase difference unwrapping method solves the multi-baseline interference phase model,realizes the phase unwrapping,uses the nonlinear deformation phase and the atmospheric delay phase separation method to improve the linear deformation accuracy of the coherent target,and realizes the deformation monitoring of the tower structure.The experimental results show that this method can accurately monitor the structural deformation of single-tube towers,three-tube towers and angle steel towers.The monitoring accuracy can reach the sub-millimeter level,and the effective analysis of the tower’s deformation state can be realized.
作者
叶青
程智
胡小红
陈俊
孙雄
YE Qing;CHENG Zhi;HU Xiaohong;CHEN Jun;SUN Xiong(Quzhou Power Supply Company,State Grid Zhejiang Electric Power Co.,Ltd.,Quzhou 324000,China)
出处
《中国测试》
CAS
北大核心
2021年第9期34-40,共7页
China Measurement & Test
基金
国网浙江省电力有限公司2020年科技项目(5211QZ1900J6)。
关键词
雷达波相位干涉
测量技术
杆塔结构
形变监测
干涉纹
相位差解缠
radar wave phase interferometry
measurement technology
tower structure
deformation monitoring
interference pattern
phase difference unwrapping
