Bridge safety early warning method based on PSInSAR technology

A safety warning and bridge technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc., can solve the problems of high cost of manual detection equipment, long detection period, and heavy workload.

Inactive Publication Date: 2018-11-30
国交空间信息技术(北京)有限公司 +2
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Problems solved by technology

[0006] The purpose of the present invention is to: overcome the above-mentioned deficiencies in the bridge deformation monitoring and early warning methods in the prior art, and provide a bridge safety early warning method based on PSInSAR technology, which solves the high cost of equipment required for manual detection, heavy workload, and long detection cycle. Long-term problems, can effectively give early warning of bridge safety problems, etc.

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  • Bridge safety early warning method based on PSInSAR technology
  • Bridge safety early warning method based on PSInSAR technology
  • Bridge safety early warning method based on PSInSAR technology

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[0066] Attached below Figure 1-6 The bridge safety early warning method based on PSInSAR technology of the present invention is described in detail.

[0067] A bridge safety early warning method based on PSInSAR technology, the method comprises the following steps:

[0068] S1: Deformation information extraction through the spotlight mode PSInSAR: mainly work on the spotlight mode, using the phase preservation of the spotlight processing algorithm; based on the resampling technology of the spotlight mode, the resampling of the auxiliary image is performed after the image registration, so as to Facilitate the generation of interference fringes ； Extraction of deformation information of permanent scatterers (PS);

[0069] S2: Establish a PSInSAR coherence evaluation model based on the bridge model, that is, establish a space-time covariance system model of interferometric phase noise to evaluate the interferometric performance of spaceborne permanent scatterers;

[0070] S3:...

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Abstract

The invention relates to a bridge safety early warning method based on PSInSAR technology. The bridge safety early warning method comprises steps that S1: by adopting a bundling mode PSInSAR, bridge deformation information is extracted; S2: a PSInSAR coherence evaluation model based on a bridge model is established; S3: based on the bridge deformation key points of the SAR technology, the random deformation rule thereof is acquired; S4: by combining with the bridge deformation key point deformation information acquired by the PSInSAR, according to a bridge construction norm, a multidimensionalrandom variable theory is adopted, and bridge safety early warning criteria based on high definition remote sensing data are established. Problems such as high costs of equipment required by manual detection, heavy workload, and long detection period are solved, and early warning of bridge safety problems can be effectively carried out.

Description

technical field [0001] The invention relates to the technical field of bridge early warning, in particular to a bridge safety early warning method based on PSInSAR technology. Background technique [0002] The safety early warning research of bridge structure is a new topic raised with the continuous development of structural engineering research theory and engineering practical needs in recent decades. Safety early warning is to obtain the overall evaluation of structural safety performance through the obtained monitoring data and calculation conclusions. The safety warning can not only scientifically give the reliability of the structure, but also an important reference for formulating maintenance and repair plans. [0003] The current common methods include: (1) evaluation method based on visual inspection; (2) method based on design specifications; (3) load test evaluation method; (4) expert experience evaluation method; (5) method based on structural reliability theory...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/9023G01S13/9094
Inventor 罗伦冯涛张华李缘廷
Owner 国交空间信息技术(北京)有限公司
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