Diffraction and superposition imaging method and system of ground penetrating radar considering antenna pattern
An antenna pattern, ground penetrating radar technology, applied in radio wave measurement systems, radio wave reflection/re-radiation, use of re-radiation and other directions, can solve problems such as insufficient imaging accuracy
Active Publication Date: 2021-04-02
GUANGZHOU UNIVERSITY
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] In order to overcome the defects and deficiencies in the prior art, the present invention provides a ground penetrating radar diffraction superposition imaging method and system considering the antenna pattern, and introduces the antenna radiation pattern into the offset imaging method to solve the classic diffraction problem. The problem of insufficient imaging accuracy in stacking migration imaging improves the imaging accuracy and imaging effect of underground targets
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
[0068] Such as figure 1 As shown, this embodiment provides a ground penetrating radar diffraction superposition imaging method considering the antenna pattern, including the following steps:
[0069] S1: Set up the transmitting and receiving antenna and the corresponding measuring line on the component to be tested, the transmitting antenna radiates electromagnetic waves to the inside of the component, the receiving antenna receives the echo signal, and the transmitting and receiving antenna makes a common offset along the measuring line according to the set track spacing B- Scan sampling;
[0070] S2: Extract each echo signal received by the receiving antenna;
[0071] S3: An ideal point scatterer located at point (x, z). For a homogeneous medium, the electromagnetic wave is emitted by the transmitting antenna and scattered by the point scatterer, and finally received by the receiving antenna.
[0072]
[0073] Among them, x is the antenna scanning direction, z is the un...
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 diffraction stack imaging method and system taking antenna patterns into consideration. The method comprises the following steps: receiving and transmitting antennae and corresponding measuring lines are arranged on a to-be-measured component, and the receiving and transmitting antennae perform co-offset B-Scan sampling along the measuring lines;each received echo signal is extracted; travel distances of transmitting, scattering and receiving electromagnetic waves by the transmitting antenna, a point scatter and the receiving antenna are calculated; travel time of the electromagnetic wave of each imaging point of an imaging space is extracted; a range value of an imaging area and a sampling interval of pixel points are set, and a receivedsignal index is established according to the travel time; an scattered electric field value of each point of the imaging space is calculated according to the travel time index; the patterns of the antennae in a radar system are obtained; and diffraction stack migration is corrected, and the scattered electric field values of the points of the imaging space calculated by received data are superposed to serve as an imaging result after migration. The antenna radiation patterns are introduced in the migration imaging method, so that the imaging precision and the imaging effect of an undergroundtarget are improved.
Description
technical field [0001] The invention relates to the technical field of ground-penetrating radar detection, in particular to a ground-penetrating radar diffraction and superposition imaging method and system considering an antenna pattern. Background technique [0002] Ground-penetrating radar technology has been widely used in civil engineering detection, planetary detection, geological exploration and other fields. It has become an urgent need in practical engineering applications. The ground penetrating radar radiates high-frequency electromagnetic wave pulse signals to the ground through the antenna, and the receiving antenna receives the echo signal from the underground target on the ground surface. The electromagnetic wave energy radiated by the antenna to different directions underground is different, which is represented by the antenna radiation pattern. In the classic diffraction superposition migration imaging method, the emission source is ideally approximated as ...
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): G01S13/88G01S13/89
CPCG01S13/885G01S13/89
Inventor 刘海杨泽帆林健颖崔杰罗威力童华炜吴会军
Owner GUANGZHOU UNIVERSITY