Extraction method of gbinsar 3D displacement field based on 3D laser scanning
A three-dimensional laser and extraction method technology, applied in the direction of using optical devices, instruments, measuring devices, etc., can solve the problem of insufficient research on fusion technology, and achieve good practical application value, rapid acquisition, and wide coverage.
Inactive Publication Date: 2018-12-14
HOHAI UNIV
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Problems solved by technology
The fusion of GBInSAR and 3D laser scanning can realize the rapid acquisition of high-precision 3D displacement field, but the current research on fusion technology is not deep enough
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[0024] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0025] The present invention relates to a GBInSAR three-dimensional displacement field extraction method based on three-dimensional laser scanning, comprising the following steps:
[0026] 1) Select the monitoring area, and place the 3D laser scanner and GBInSAR observation device at a suitable position in the monitoring area, such as figure 1 As shown, the position coordinates of the 3D laser scanner are L(x L, the y L, z L ), the position coordinate of GBInSAR is G(x L, the y L, z L ), so that the monitoring ranges of the two are roughly the same.
[0027] The monitoring area must be less covered by surface vegetation, have a certain slope, and the surrounding environment changes little...
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The invention discloses a three-dimensional-laser-scanning-based GBInSAR three-dimensional displacement field extraction method. According to the method, while high-precision monitoring is carried out on a monitored area by using a GBInSAR technology, fine scanning is carried out on the monitored area by using a three-dimensional laser scanner, so that deformation information is obtained respectively; precise registration is carried out on the deformation information; with utilization of projected angles obtained by three-dimensional laser scanning and high-precision line-of-sight displacement of the GBInSAR, the deformation information is fused effectively and thus a high-precision three-dimensional displacement field is obtained. According to the invention, the method has the following beneficial effects: three-dimensional deformation information of a deformed body is obtained by three-dimensional laser and a distance of a radar line of sight is obtained by using the GBInSAR technology, so that rapid obtaining of a high-precision three-dimensional displacement field is realized. The method has advantages of fast speed, high precision, wide coverage range, high portability, easy operation, and good all-weather performance and the like and has the good theoretical significance and great practical application value in the crustal deformation monitoring technical field.
Description
technical field [0001] The invention relates to a GBInSAR three-dimensional displacement field extraction method based on three-dimensional laser scanning, which belongs to the technical field of ground-based radar interferometry. Background technique [0002] Deformation monitoring is to measure the monitored object or object to determine its spatial position and internal shape change characteristics over time. Due to the shortcomings of traditional monitoring methods such as low spatial resolution, poor continuity, and large environmental impact, the application and development of deformation monitoring are hindered. How to quickly obtain high-precision, high-spatial-resolution three-dimensional displacement field information of deformable bodies has become the research focus of deformation monitoring. [0003] In recent years, Synthetic Aperture Radar Interferometry (InSAR) technology has opened up a new way for deformation monitoring. With the continuous development an...
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IPC IPC(8): G01B11/16
CPCG01B11/16
Inventor 岳建平岳顺郭乐萍邱志伟
Owner HOHAI UNIV