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Foundation pit deformation monitoring method and system based on ground-based differential interference radar
The invention provides a foundation pit deformation monitoring method and system based on a ground-based differential interference radar. The method comprises the following steps: obtaining a coherent accumulation diagram, an amplitude deviation diagram and an interference phase diagram sequence based on all obtained radar images; a signal-to-noise ratio threshold and an amplitude deviation threshold are set, PS points are screened based on the coherent accumulation diagram and the amplitude deviation diagram, PS is a Permanent Scatter and a permanent scatterer, and a PS point interferometric phase diagram sequence is obtained; for each PS point interferometric phase diagram, selecting a plurality of PS points with the minimum amplitude deviation as reference points to perform spatial dimension phase unwrapping; performing atmospheric phase compensation by adopting a linear model; and PS points located in the foundation pit area are selected for deformation analysis. According to the method, the error of the obtained PS interferometric phase diagram of the foundation pit area is corrected, and atmospheric phase compensation is performed by adopting the linear model, so that the deformation measurement precision and the deformation analysis accuracy are improved.
本发明提供一种基于地基差分干涉雷达的基坑形变监测方法及系统，所述方法包括以下步骤：基于获取的所有雷达图像获取相参累加图、幅度离差图和干涉相位图序列；设置信噪比门限和幅度离差门限，基于相参累加图、幅度离差图筛选出PS点，PS即Permanent Scatterer，永久散射体，获取PS点干涉相位图序列；对于每一幅PS点干涉相位图，选取幅度离差最小的多个PS点作为参考点进行空间维相位解缠；采用线性模型进行大气相位补偿；选择位于基坑区域的PS点进行形变分析。本发明通过对获取到的基坑区域的PS干涉相位图的误差进行修正，采用线性模型进行大气相位补偿，提高了形变测量的精度以及形变分析的准确度。
Foundation pit deformation monitoring method and system based on ground-based differential interference radar
The invention provides a foundation pit deformation monitoring method and system based on a ground-based differential interference radar. The method comprises the following steps: obtaining a coherent accumulation diagram, an amplitude deviation diagram and an interference phase diagram sequence based on all obtained radar images; a signal-to-noise ratio threshold and an amplitude deviation threshold are set, PS points are screened based on the coherent accumulation diagram and the amplitude deviation diagram, PS is a Permanent Scatter and a permanent scatterer, and a PS point interferometric phase diagram sequence is obtained; for each PS point interferometric phase diagram, selecting a plurality of PS points with the minimum amplitude deviation as reference points to perform spatial dimension phase unwrapping; performing atmospheric phase compensation by adopting a linear model; and PS points located in the foundation pit area are selected for deformation analysis. According to the method, the error of the obtained PS interferometric phase diagram of the foundation pit area is corrected, and atmospheric phase compensation is performed by adopting the linear model, so that the deformation measurement precision and the deformation analysis accuracy are improved.
本发明提供一种基于地基差分干涉雷达的基坑形变监测方法及系统，所述方法包括以下步骤：基于获取的所有雷达图像获取相参累加图、幅度离差图和干涉相位图序列；设置信噪比门限和幅度离差门限，基于相参累加图、幅度离差图筛选出PS点，PS即Permanent Scatterer，永久散射体，获取PS点干涉相位图序列；对于每一幅PS点干涉相位图，选取幅度离差最小的多个PS点作为参考点进行空间维相位解缠；采用线性模型进行大气相位补偿；选择位于基坑区域的PS点进行形变分析。本发明通过对获取到的基坑区域的PS干涉相位图的误差进行修正，采用线性模型进行大气相位补偿，提高了形变测量的精度以及形变分析的准确度。
Foundation pit deformation monitoring method and system based on ground-based differential interference radar
一种基于地基差分干涉雷达的基坑形变监测方法及系统
CUI JINGRUI (author) / HAO JIANBING (author) / WANG JIAN (author) / LI XIAOXIAO (author) / DENG YUNKAI (author) / LI ZEBIAO (author) / ZHANG TINGAN (author) / LIU HAIYUAN (author) / PAN ZHENDONG (author) / JIN YANZHAO (author)
2024-01-09
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
/
G01B
MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS
,
Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen
/
G01S
RADIO DIRECTION-FINDING
,
Funkpeilung
/
G06T
Bilddatenverarbeitung oder Bilddatenerzeugung allgemein
,
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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