Buried steel pipeline damage full-tensor geomagnetic detection system and implementation method

Abstract

The invention discloses a buried steel pipeline damage full-tensor geomagnetic detection system and an implementation method. A signal conditioning module is used for conditioning multi-channel differential analog voltage signals output by a tunnel magnetic resistance multi-element sensor array probe; a data information high-speed processing module is composed of an FPGA as a main control chip; apipeline damage feature extraction and identification module is controlled by an ARM; a damage positioning module is used for acquiring longitude and latitude coordinate information, the pipeline detection route is calculated, and the damage position is positioned; the field environment is combined to divide and independently process the magnetic field information of different pipe sections, meanwhile, the 15-axis data is deeply excavated, array advantages are brought into play, the gradient of the three-dimensional damage magnetic field signals in the three directions of the XYZ is calculated, a magnetic gradient full tensor matrix is constructed, and effective extraction and identification of pipeline damage information are realized. According to the buried steel pipeline damage full-tensor geomagnetic detection system, an additional excitation source is not needed, a feasible scheme for non-excavation detection on the ground of the buried steel pipeline is provided, and a certain reference and practical values are achieved.

Description

technical field [0001] The invention relates to the field of pipeline detection, in particular to a non-excavation detection technology for ground damage of buried steel pipelines. Background technique [0002] Some of my country's active oil and gas pipelines have entered the aging stage. Due to corrosion, third-party damage, natural disasters and other reasons, pipeline accidents occur frequently, which can easily lead to catastrophic accidents such as explosions, fires, and poisoning, causing heavy losses to people's lives and property. And seriously pollute the environment, social impact is bad. Therefore, in order to ensure the safe operation of the pipeline, the corresponding testing equipment and technical methods are particularly important. [0003] At present, manual inspection and external corrosion detection are generally used in pipeline inspection, which are not enough to effectively detect the pipeline itself, and cannot fundamentally make a reliable evaluation...

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Problems solved by technology

[0005] In order to solve the defects and deficiencies existing in the existing detection equipment and methods, the present invention proposes a buried steel pipeline damage full-tensor geomagnetic detection system and its implementation method, using FPGA and ARM dual main control systems and magnetic gradient full-scale Based on quantitative theory, multi-sensor array probes are designed to realize reliable identification and effective extraction of non-excavation magnetic field signals on pipeline damage ground in complex environments

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