A high-speed railway psi settlement monitoring information extraction method

Abstract

The invention discloses a high speed railway PSI sedimentation monitoring information extraction method, wherein online and offline separation is performed on a PSI sedimentation monitoring result of a high speed railway transit area, sedimentation curved surfaces of a high speed railway structural body and a surface area are respectively established by use of Delaunay triangulated irregular network technology, and the sedimentation information of any mileage segment of the high speed railway structural body and the surface area is obtained by subsequent data processing. The specific steps comprise the processes of establishing a transformational relation between a horizontal coordinate of a high speed railway line position and a line mileage, establishing the attribute information of a PS point, establishing a buffering area of the high speed railway structural body, separating the high speed railway structural body from the PS point on the surface through the buffering area, establishing the sedimentation curved surfaces of the high speed railway structural body and the surface, and extracting the sedimentation information of the high speed railway structural body and the surface. Compared with the current integral area sedimentation evaluation method usually used at home and abroad, the high speed railway PSI sedimentation monitoring information extraction method disclosed by the invention reduces the occurrence probability of gross error, improves the extraction precision of the sedimentation monitoring information of the high speed railway structural body and perfects the extraction and inquiry efficiency of the sedimentation information.

Description

technical field [0001] The invention relates to high-speed railway settlement monitoring technology, in particular to the technology of using differential synthetic aperture radar interferometry to monitor the settlement of high-speed railway structures. Background technique [0002] In recent years, DInSAR (Difference Interferometric SAR, Differential Synthetic Aperture Radar Interferometry) technology has become the most effective and commonly used method for regional subsidence monitoring. Using DInSAR technology, it is possible to use a non-contact method to detect the movement of fixed objects on the surface within a certain period. This method is especially suitable for subsidence monitoring of the regional surface. This technology is greatly affected by space-time decoherence, and the monitoring accuracy is generally at the centimeter level. In order to improve the accuracy, the researchers proposed the PSI (Permanent Scatter Interferometric SAR, permanent scatterer ...

AI Technical Summary

Problems solved by technology

There are the following shortcomings in the application process: (1) The original conventional DInSAR settlement information extraction algorithm is not efficient, and the probability of errors in the extracted settlement information is high; (2) The conventional extraction algorithm regards the high-speed railway structure and the ground surface along the line as Extraction of settlement information as a whole, ignoring the irrelevance of online settlement and offline settlement, the accuracy of the extracted high-speed rail structure is easily affected by surface settlement

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