A Deformation Monitoring Method Based on Adaptive Combination of GPS and Strong Seismometer Observations

A strong motion instrument and adaptive technology, applied in the field of surface deformation monitoring, can solve the problems of low sampling frequency, low high-frequency signal-to-noise ratio, poor signal stability, etc., and achieve the effect of accelerating convergence speed and reducing observation noise

Active Publication Date: 2018-10-23
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

GPS is easy to obtain high-precision displacement, but it has the defects of low sampling frequency, low high-frequency signal-to-noise ratio, and poor signal stability. There is often a deviation in displacement
The current data processing methods are mostly single-sensor mode, resulting in the underutilization of multi-sensor observation resources

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  • A Deformation Monitoring Method Based on Adaptive Combination of GPS and Strong Seismometer Observations
  • A Deformation Monitoring Method Based on Adaptive Combination of GPS and Strong Seismometer Observations
  • A Deformation Monitoring Method Based on Adaptive Combination of GPS and Strong Seismometer Observations

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0040] The invention integrates the high-resolution strong motion instrument acceleration observation into the GPS-PPP positioning model, and uses the baseline drift error of the strong motion instrument as an unknown parameter for real-time estimation together with other positioning parameters, and at the same time adjusts the dynamic noise through self-adaption and solve the time window to achieve the optimization of parameter estimation, which not only efficiently solves the problem of baseline drift correction, but also enhances the solution strength of GPS, reduces high-frequency noise, realizes the complementary advantages of the two observation technologies, and can obtain real-time High-precision wide-band deformation information.

[0041] The technical solution of ...

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Abstract

The invention provides a deformation monitoring method based on GPS and strong-motion seismograph observation adaptive combination. The method is characterized by fusing high-resolution strong-motion seismograph acceleration observation to a GPS-PPP positioning module, and serving baseline drift errors of a strong-motion seismograph as unknown parameters and carrying out real-time estimation together with other positioning parameters; and meanwhile, realizing parameter estimation optimization by adaptively adjusting dynamic noise and calculating a time window, thereby not only solving the problem of correction of baseline drift, but also enhancing GPS solving intensity, reducing high-frequency noise, and realizing advantage complementation of the two observation technologies; and the method can obtain high-precision wide band deformation information in real time and has a wide application prospect. The method has the advantages of advanced algorithm, high precision, high stability and high degree of automation and the like, has overall package of a multi-satellite system of a BDS, a GPS, a GLONASS and the like, is easy to realize and can be suitable for a plurality of application occasions.

Description

technical field [0001] The invention relates to a method for monitoring ground deformation. Background technique [0002] GPS and strong motion instrument observations are two effective means to obtain high-precision surface deformation (displacement, velocity, acceleration). They have been widely used in natural disaster monitoring and have their own characteristics. GPS is easy to obtain high-precision displacement, but it has the defects of low sampling frequency, low high-frequency signal-to-noise ratio, and poor signal stability. Displacement is often biased. The current data processing methods are mostly single-sensor mode, resulting in the underutilization of multi-sensor observation resources. How to organically combine the two types of observation data to achieve complementary advantages, provide high-precision broadband deformation information in real time, and better serve deformation monitoring such as disasters is of great value. Contents of the invention ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/86G01S13/88
CPCG01S13/86G01S13/885
Inventor 涂锐卢晓春成芳张鹏飞张兴刚
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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