Bridge deformation multi-frequency dynamic analysis method based on combined differential GNSS

An analysis method and bridge technology, applied in the direction of electric/magnetic solid deformation measurement, satellite radio beacon positioning system, measurement device, etc., to achieve good results in ensuring monitoring analysis and safety monitoring

Active Publication Date: 2018-12-21
CHINA ACAD OF TRANSPORTATION SCI +1
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Problems solved by technology

[0007] The purpose of the present invention is to provide a multi-frequency dynamic analysis method for bridge deformation based on combined differential GNSS, so as to solve the aforementioned problems existing in the prior art

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  • Bridge deformation multi-frequency dynamic analysis method based on combined differential GNSS
  • Bridge deformation multi-frequency dynamic analysis method based on combined differential GNSS
  • Bridge deformation multi-frequency dynamic analysis method based on combined differential GNSS

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[0051] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0052] The constellation layout of the Beidou satellite navigation system has five geostationary orbit satellites (GEO) in addition to medium earth orbit satellites (MEO). As the main star, its stability is better than that of the main star selected by the maximum elevation angle or the maximum signal-to-noise ratio, which can effectively improve the calculation accuracy. Experts and scholars at home and abroad have conducted research and simulation tests on the combined GNSS system, and believe that the combined system can effectively solve the problem of satellite signal occlusion and eliminate ...

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Abstract

The invention discloses a bridge deformation multi-frequency dynamic analysis method based on a combined differential GNSS and relates to the field of bridge deformation monitoring technologies. According to the method, an orthogonal wavelet fast decomposition algorithm is utilized to process a bridge GNSS monitoring signal, an analysis signal is separated on different bands, and multi-scale analysis is performed on a deformation signal; a high-frequency signal is utilized to analyze wink movement of a bridge under the action of external forces such as wind power, vehicle passage or other seismic disasters, and a de-noised low-frequency signal is utilized to analyze a deformation track of a bridge dynamic deformation body; and last, the analysis result is utilized to further analyze the bridge deformation trend. Therefore, by analyzing the characteristics of different frequencies in the GNSS monitoring signal, a static response and a dynamic response of the bridge can be effectively decomposed, the problem that the reason for bridge deformation caused by a bridge three-dimensional displacement change cannot be judged through an existing bridge monitoring system is solved, subsequent monitoring analysis is effectively guaranteed, and a good guarantee is provided for safety monitoring of the bridge.

Description

technical field [0001] The invention relates to the technical field of bridge deformation monitoring, in particular to a multi-frequency dynamic analysis method for bridge deformation based on combined differential GNSS. Background technique [0002] The GPS positioning system has become a revolutionary change in the surveying discipline due to its high flexibility in positioning and high precision unmatched by conventional surveying techniques. With the improvement of GPS positioning accuracy and high sampling frequency, it provides the possibility of real-time or quasi-real-time displacement monitoring of buildings. Due to the limitation of GPS single-point positioning accuracy, it is currently used in high-precision building displacement monitoring, and GNSS monitoring is usually used. [0003] The basic working principle of differential GNSS is as follows: figure 1 As shown, it is mainly to use different receivers in the same area to eliminate four kinds of error compo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16G01S19/14
CPCG01B7/16G01S19/14
Inventor 王里王哲陈建华刘玲程晓光郭磐石
Owner CHINA ACAD OF TRANSPORTATION SCI
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