Short-term displacement detection method based on GNSS dynamic positioning time sequence segmentation

A time-series, dynamic positioning technology, applied in the field of displacement detection, can solve problems such as inability to detect and extract displacement, and achieve high precision

Active Publication Date: 2021-01-05
WUHAN UNIV
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Problems solved by technology

[0005] The present invention solves the problem that the prior art cannot effectively detect and extract displacement in ...

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  • Short-term displacement detection method based on GNSS dynamic positioning time sequence segmentation
  • Short-term displacement detection method based on GNSS dynamic positioning time sequence segmentation
  • Short-term displacement detection method based on GNSS dynamic positioning time sequence segmentation

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Embodiment Construction

[0046] The present invention aims to explore a short-term displacement detection method based on GNSS dynamic positioning time series segmentation, using the coordinate time series formed by the current epoch coordinates and the previous epoch coordinates obtained by GNSS dynamic positioning as the basic processing unit of segmentation. The segmentation points obtained from the detection window are regarded as potential change points, and a statistical test is performed on the potential change points to determine whether the segmentation point is a change point.

[0047] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0048] This embodiment provides a short-term displacement detection method based on GNSS dynamic positioning time series segmentation, which mainly includes the following steps:

[0049...

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Abstract

The invention belongs to the technical field of displacement detection, and discloses a short-term displacement detection method based on GNSS dynamic positioning time sequence segmentation. The method comprises the steps: firstly obtaining an original coordinate time sequence through GNSS dynamic positioning; carrying out time sequence segmentation by utilizing a detection window to obtain a setof possible change points; for each possible change point, obtaining a statistical value of the possible change point, and judging whether the possible change point is a change point or not accordingto the statistical value and a preset threshold value; finally, for each change point, obtaining a previous displacement estimation value corresponding to the change point, and obtaining a final displacement estimation value based on the previous displacement estimation value. According to the method disclosed in the invention, the problem that the displacement cannot be effectively detected and extracted in a short time in the prior art is solved, and the displacement can be effectively detected and extracted in a short time.

Description

technical field [0001] The invention relates to the technical field of displacement detection, in particular to a short-term displacement detection method based on GNSS dynamic positioning time series segmentation. Background technique [0002] Displacement measurement plays a positive role in the fields of geological disasters, mine safety, structural health and safety monitoring, and industrial measurement. Over the past two decades, there has been a surge in research on displacement monitoring using the Global Navigation Satellite System (GNSS). Compared with the traditional displacement monitoring technology, GNSS has the advantages of not being affected by the weather, no need for line-of-sight between monitoring points, high precision, and multiple time scales. In addition, with the continuous development of GNSS technology, the cost of receivers has been continuously reduced, and the positioning accuracy has been continuously improved. GNSS has become one of the mos...

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Application Information

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IPC IPC(8): G06T7/254G06T7/11G06T5/00G06F17/18G06F17/14
CPCG06T5/002G06T7/11G06T7/254G06F17/148G06F17/18
Inventor 陈亮沈楠陈锐志
Owner WUHAN UNIV
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