A data processing method of ground radar b-scan

A data processing and geological radar technology, which is applied to instruments, measuring devices, and re-radiation, etc., can solve the problems of affecting the detection effect of the separation effect and the difficulty of setting filter parameters, so as to achieve effective separation, improve lateral resolution, and achieve consistency. Effect

Active Publication Date: 2021-04-13
XI AN JIAOTONG UNIV
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Problems solved by technology

[0012] These filters are usually based on numerical simulation to set filter parameters, but the actual ground radar B-scan profile and the simulated profile will have a certain deviation, because when the set filter parameters are used for the actual B-scan profile processing, It will lead to the difficulty of setting the appropriate filtering parameters, which will affect the subsequent separation effect and detection effect

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  • A data processing method of ground radar b-scan
  • A data processing method of ground radar b-scan
  • A data processing method of ground radar b-scan

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[0040] Attached below figure 1 To accompanying drawing 6 (C) and specific embodiment, the present invention is described in further detail.

[0041] In one embodiment, the present disclosure discloses a ground radar B-scan data processing method, the method comprising the following steps:

[0042] S100. For each piece of data (A-scan) on the B-scan profile, the spectral whitening and frequency expansion method is used to process it to obtain a B-scan profile with high temporal resolution;

[0043] S200. Based on the phase shift migration imaging method, perform two-dimensional migration imaging on the high time resolution B-scan data to obtain a B-scan imaging section;

[0044] S300. Perform iterative sparse separation on the B-scan imaging profile obtained in step S200 based on the morphological component analysis method;

[0045] S400. Analyzing the point characteristics and layered structure of the two components separated by iterative sparse separation.

[0046] Further...

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Abstract

The invention discloses a geological radar B-scan data processing method. The method utilizes a signal processing method to process the B-scan data to separate and obtain data profiles for tunnel lining abnormality and railway roadbed disease detection. First, the continuum whitening spectrum expansion technology is used to improve the time resolution of the signal, and then the high-resolution data is migrated and imaged by using efficient phase shift migration to improve the lateral resolution of the section, so that the reinforcement inside the lining or roadbed on the imaging section Focusing on point structures, and finally based on the difference between point targets such as steel bars and reflection interfaces (concrete and clay layer or surrounding rock interface), the sparse separation method based on morphological component analysis is used to separate out different parts such as steel bar structures and reflection interfaces. morphological components. This method helps to improve the accuracy of tunnel lining and railway subgrade detection, and provides a strong basis for tunnel and railway maintenance.

Description

technical field [0001] The invention belongs to the signal processing field of geological radar signals, in particular to a method for processing geological radar B-scan data. Background technique [0002] Tunnel construction is an important issue in highway and railway construction, and tunnel lining construction is an important link in tunnel construction at present. The later inspection of tunnel lining is an important judgment of construction quality. On the other hand, roadbed instability induced by railway subgrade disease is an important factor affecting the safe operation of railways. It is of great significance to develop effective railway subgrade detection methods. Ground-penetrating Radar (GPR) arranged on the surface of the detection target transmits high-frequency electromagnetic waves with broadband and short pulses through the transmitting antenna, and the electromagnetic waves pass through the dielectric body with electrical differences during the propagati...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/88G01S13/89
CPCG01S13/885G01S13/89
Inventor 周艳辉师振盛王晓凯陈文超
Owner XI AN JIAOTONG UNIV
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