Solid tide response removing method based on improved variational mode decomposition

A technology of variational mode decomposition and solid tide, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve difficult problems
CN112684493APending Publication Date: 2021-04-20HAINAN NORMAL UNIVERSITY
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HAINAN NORMAL UNIVERSITY
Publication Date
2021-04-20

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a solid tide response removing method based on improved variational mode decomposition. The method comprises the following steps: inputting data collected by a ground instrument and carrying out data preprocessing; calculating the frequency spectrum of the data, comparing the frequency characteristics of the earth tide response, and determining the influence range of the earth tide response on the data in the frequency domain; determining a frequency segmentation point f according to the influence range of the earth tide response on the frequency domain; constraining the estimated center frequency of variational mode decomposition according to the frequency segmentation point f; decomposing the data by adopting a central frequency constrained variational mode decomposition method, finding out optimal components under different central frequency constraint conditions to obtain various modes, and arranging the decomposed modes from small to large according to the central frequency of the modes; and removing the earth tide response mode in each mode. The method solves the problem that it is difficult to effectively remove periodic response generated by earth tide in a frequency domain on the basis of not damaging frequency characteristics of different source signals in observation data in an existing method.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of solid tidal response removal in ground observation data, in particular to a method for removing solid tidal response based on improved variational mode decomposition. Background technique

[0002] Ground observation refers to the direct measurement of the local parameter values ​​near the surface at a certain point on the ground by special instruments. At present, ground observation technology is widely used in meteorological monitoring, hydrological monitoring and earthquake monitoring and other fields. With the advancement of science and technology, the research on ground observation instruments has developed rapidly, and the accuracy and stability of the instruments have been greatly improved. However, the ground observation data will still be interfered by external signals, which seriously affects the identification and extraction of the real information of the observation target. Solid tide refers to the per...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More