Ground penetrating radar underground target location method and system based on box spline wavelet framework

Abstract

The invention relates to a ground penetrating radar underground target positioning method and system based on a box spline wavelet framework. Echo image data of a ground penetrating radar is obtained firstly, a direct wave image in the image is removed, and then a ground penetrating radar signal after preprocessing is obtained; the ground penetrating radar signal after the preprocessing is decomposed through adoption of a box spline wavelet then, and edge positioning is performed on a decomposition result; an edge curve of the image is fitted, and a point at which the derivate of the curve is zero is selected and taken as the vertex of the radar image; and an underground target curve equation is established finally, two points on edges are asymmetrically selected on two branches of the vertex of the radar image, an underground target curve is fitted by utilizing a three-point fitting method, and then positioning of an underground target is achieved. Target positioning precision is improved through the positioning method. For possible shallow layer exploration of a metal pipeline and a nonmetallic pipeline, a false alarm is not easy to generate. An algorithm is simple, operation time is short, and target positioning efficiency is improved.

Description

technical field [0001] The invention relates to a ground penetrating radar underground target positioning method and system based on a box spline wavelet frame, and belongs to the technical field of ground penetrating radar detection. Background technique [0002] Ground-penetrating radar is an effective shallow underground target detection technology developed rapidly in recent decades. It is a non-destructive detection method with fast detection speed, high resolution, convenient and flexible operation, and low detection cost. With many advantages, it has been widely used in the detection and positioning of underground targets, such as cavities, pipelines, mines, etc. The two-dimensional echo data detected by ground penetrating radar is called B-Scan data, which is the data basis for subsequent radar signal processing, target recognition and interpretation, and the ground penetrating radar target positioning technology is also based on B-Scan data. The biggest influence o...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a ground penetrating radar underground target positioning method based on the box spline wavelet framework, to solve the problems of large amount of calculation and inaccurate positioning in the current underground target positioning method; the present invention also provides a method based on box Ground Penetrating Radar Underground Target Location System Based on Spline Wavelet Frame

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