Method for extracting depth of shallow buried pipe in reclamation land

Abstract

The invention discloses a method for extracting the depth of a shallow buried pipe in a reclamation land, and the method comprises the steps: arranging a ground penetrating radar measuring line in a direction perpendicular to the distribution direction of the buried pipe, employing a high-frequency ground penetrating radar antenna for detection, and obtaining an original radar image of a research area; building a method based on the variance statistics, and extracting a target region of the buried pipe on a radar image; calculating the similarity level and correlation coefficient of adjacent echo signals, extracting feature points (shown in the description) of a reflection characteristic curve of a pipe target; carrying out the curve fitting of the feature points through employing a Levenberg-Marquardt algorithm, and obtaining the top point of a reflection characteristic curve; obtaining the electromagnetic wave propagation velocity based on the above through combining the diameter of the buried pipe and employing a least square algorithm, and finally calculating the depth of the buried pipe more accurately. The method employs the lossless detection technology based on the ground penetrating radar, and is a new method for the acceptance check of the land reclamation and consolidation projects of our country.

Description

technical field [0001] The invention relates to the technical field of project quality monitoring, in particular to a method for extracting the depth of shallow buried pipes in land reclamation and development and finishing projects. Background technique [0002] In my country, the coal industry accounts for nearly 70% of the primary energy consumption. Experts predict that this proportion may still reach about 50% by 2050. However, while coal resources provide power for the development of my country's national economy, It has also caused a large amount of damaged land, especially in the high-water level areas in the central and eastern regions. This phenomenon is more obvious. The cultivated land has become perennial and seasonal waters, completely losing the ability to cultivate. Moreover, in recent years, with the rapid advancement of urbanization, land is a scarce strategic resource, and the lack of land use indicators has seriously restricted the development of cities. ...

AI Technical Summary

Problems solved by technology

[0006] Due to the inhomogeneity and complexity of the upper medium of the target object in the developed soil, the actual target echo signal is not ideal, and there are generally more coherent interference and noise in the GPR radar echo. Therefore, in The actual application process will increase the complexity of ground penetrating radar detection and interpretation. The extraction of the depth of shallow buried pipes should solve the following problems: 1) The ROI (region of interest) area extraction of buried pipes in radar images: various The interference of factors and the influence of clutter and noise make the ROI area extraction and automatic target detection in GPR images extremely difficult, and because the radar detection area is generally large, when the amount of acquired data is large, the disadvantages of the manual interpretation method will appear. come out

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