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Ground penetrating radar signal quantitative analysis method and system

A geological radar and quantitative analysis technology, applied in radio wave measurement systems, measurement devices, reflection/re-radiation of radio waves, etc., can solve the problems of poor quantitative analysis accuracy and stability, and achieve the effect of accurate quantitative analysis

Inactive Publication Date: 2019-04-16
CHANGSHA UNIVERSITY
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Problems solved by technology

The deconvolution technology is mainly based on the assumption that the reflection coefficient is a white noise sequence and the radar wavelet is the minimum phase. However, in the actual engineering signal, the reflection coefficient sequence is not a white noise sequence, and each reflected wave is not the minimum phase. Due to the influence of reflected wave coherence and echo noise, the accuracy and stability of the deconvolution method in quantitative analysis are generally poor, and it is difficult to accurately locate the geometric size and spatial position of the diseased area through radar signals

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  • Ground penetrating radar signal quantitative analysis method and system
  • Ground penetrating radar signal quantitative analysis method and system
  • Ground penetrating radar signal quantitative analysis method and system

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specific Embodiment 1

[0097] The specific steps of the method for quantitative analysis of ground radar signals based on biorthogonal wavelet base (abbreviation, QAGBW method):

[0098] Step 1: Image recognition of the target under test

[0099] Use the existing digital filter to filter the ground radar signal to improve the recognition (resolution) of the measured target in the radar image, and combine the existing geological (structural) data to identify the measured target in the radar image and extract A single-channel signal containing the reflected wave information of the measured target.

[0100] (Enter the command in Matlab:

[0101] ①run('F:\xxxxx\MATGPR_R2\matgpr.m');

[0102] ② Click the Data menu → click the Import Row Data submenu → select the radar save data type;

[0103] ③h=IPD.d(:,50)

[0104] Step 2: Select or construct the optimal wavelet base for quantitative analysis of ground radar signals

[0105] According to the antenna pulse function type of the ground radar signal us...

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Abstract

The invention discloses a ground penetrating radar signal quantitative analysis method and system. The method comprises steps: ground penetrating radar signals are acquired; the ground penetrating radar signals are filtered to determine a detected target in a radar image; the detected target is extracted to obtain multiple single channel signals containing detected target reflected wave information; according to the used ground penetrating radar antenna pulse function type, a corresponding quantitative analysis-used optimal wavelet basis is selected or constructed; the optimal wavelet basis isadopted to process each single channel signal to obtain multiple detail coefficient component time-modulus curves; a wavelet singularity analysis method is adopted to determine multiple detected target reflected waves in each detail coefficient component time-modulus curve; a wavelet modulus maximum method and the multiple detected target reflected waves are used to determine the coordinates of alocal modulus maximum point; and a two-way travel time formula and the coordinates of the local modulus maximum point are used to calculate the distance between different detected target reflected waves. By adopting the method or the system disclosed in the invention, accurate quantitative analysis on the ground penetrating radar signals can be realized.

Description

technical field [0001] The invention relates to the field of non-destructive testing of engineering quality, in particular to a quantitative analysis method and system for geological radar signals. Background technique [0002] Ground radar non-destructive testing technology is widely used in engineering quality testing of tunnel lining structures, road subgrade structures and railway subgrade structures. In the geological radar profile, using the existing geological radar signal processing method, engineering defects can be effectively identified. At present, the deconvolution technology mainly obtains the reflection coefficient sequence by compressing the radar wavelet to improve the image resolution of the ground radar signal, and can improve the quantitative analysis accuracy of the signal to a certain extent. The deconvolution technology is mainly based on the assumption that the reflection coefficient is a white noise sequence and the radar wavelet is the minimum phas...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S13/88
CPCG01S7/41G01S13/885
Inventor 凌同华刘浩然
Owner CHANGSHA UNIVERSITY
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