A Ground Penetrating Radar Echo Signal Denoising Algorithm Based on Automatic Inversion Correction and Kurtosis Comparison
A ground-penetrating radar and echo signal technology, applied in electromagnetic wave detection, radio wave measurement systems, instruments, etc., can solve problems such as low efficiency and signal phase uncertainty, so as to avoid phase uncertainty, improve calculation efficiency and eliminate noise effect
Active Publication Date: 2018-10-12
CENT SOUTH UNIV
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In the above processing methods, the denoising algorithm based on ICA has the problem of signal phase uncertainty, while the denoising algorithm based on CEEMD needs to distinguish each IMF component by manual interpretation, and then reconstruct the signal, which is inefficient
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] Hereinafter, the present invention will be further described in detail with reference to the drawings and specific embodiments.
[0031] GPR forward simulation such as figure 2 As shown, the underground medium has three layers, the thickness of the first and second layers is 15cm, the relative dielectric constants of the first, second and third layers are 20, 10 and 15, respectively, and a metal pipe with a radius of 4cm is buried in the second layer. The center of the metal tube is 6cm away from the upper surface of the second layer, and the transmitting and receiving antennas are located directly above the center of the metal tube, and the height above the ground is 5cm. The transmitted signal is a Ricker wavelet with a center frequency of 900MHz, and the time window is set to 40ns. The finite difference time domain method is used to simulate the scattered echo of the underground area received by the receiving antenna, such as image 3 As shown, the duration is 40ns, the...
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 PUM
Login to View More Abstract
The invention discloses a ground penetrating radar echo signal de-noising algorithm based on automatic anti-phase correction and peak value comparison. The method comprises steps that random fitting of a ground penetrating original echo signal and a zero mean value white noise signal having identical length is carried out to acquire two paths of signals; an independent composition analysis algorithm is utilized to carry out separation of the two paths of signals, the signal with a relatively large output peak value is marked as x'(m), and the signal with a relatively small output peak value is marked as n'(m); automatic anti-phase correction for the x'(m) is carried out, a complete total experience modal algorithm is utilized to decompose the signal after anti-phase correction to acquire P signal components, and a peak value of each signal component is calculated; a peak value of the n'(m) is calculated and is taken as a threshold; all the signal components of which peak values are greater than the threshold are accumulated and are taken as a signal of the original echo signal after de-noising. The method is advantaged in that calculation efficiency and the de-noising effect are improved.
Description
Technical field [0001] The invention belongs to the technical field of ground penetrating radar detection and application, and specifically relates to denoising processing of ground penetrating radar echo signals. Background technique [0002] Ground Penetrating Rada (GPR) transmits broadband electromagnetic waves to the underground through a transmitting antenna, and the receiving antenna receives scattered echoes. By processing the scattered echoes, it performs non-destructive detection and parameter inversion of unknown underground areas. When electromagnetic waves propagate in the underground medium, they will be scattered when they encounter the interface with different electrical properties. According to the received electromagnetic scattering echo, parameters such as the position, shape, and burial depth of anomalous bodies in unknown underground areas are inverted. As an important tool for detecting underground targets, GPR detects signs of underground life in humanitaria...
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 Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/12G01S7/292
CPCG01S7/292G01V3/12
Inventor 雷文太梁琼施荣华
Owner CENT SOUTH UNIV