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Parallel pipeline non-contact harmonic magnetic field diagnosis method and indoor experiment system

A harmonic magnetic field and experimental system technology, applied in the direction of material magnetic variables, etc., can solve problems such as poor anti-interference ability, complicated operation, and bulky instruments, and achieve the effect of high magnetic field strength, high sensitivity, and enhanced advantages

Pending Publication Date: 2021-04-30
BEIJING UNIV OF TECH
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Problems solved by technology

[0002] External detection technologies for pipe damage mainly include TEM transient electromagnetic method, German NoPig multi-frequency harmonic current method, and Russian MTM magnetic detection technology. High detection rate and other shortcomings, and can only achieve wall thickness thinning detection; MTM detection technology detects the magnetic field of the pipeline itself, resulting in poor anti-interference ability

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  • Parallel pipeline non-contact harmonic magnetic field diagnosis method and indoor experiment system
  • Parallel pipeline non-contact harmonic magnetic field diagnosis method and indoor experiment system
  • Parallel pipeline non-contact harmonic magnetic field diagnosis method and indoor experiment system

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Embodiment Construction

[0036] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings. like figure 1 As shown in the overall structure diagram, a parallel pipeline non-contact harmonic magnetic field diagnosis method and an indoor experimental system provided by the present invention include an experimental system frame (1), a parallel pipeline system (2), a loading module (3) and a detection module ( 4).

[0037] The present invention will be further described below in combination with specific embodiments and accompanying drawings.

[0038] figure 2 It is a structural schematic diagram of the experimental system frame (1) of the present invention, the experimental system frame (1) is made up of mounting bracket (5), pipeline sliding bracket (6) and corner piece (7), and is used for installing parallel pipeline system (2), Detect the guide rail platform (16) and the single-rod piston double-acting hydraulic cyli...

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Abstract

The invention discloses a parallel pipeline non-contact harmonic magnetic field diagnosis method and an indoor experiment system. The parallel pipeline non-contact harmonic magnetic field diagnosis system comprises an experiment system frame (1), a parallel pipeline system (2), a loading module (3) and a detection module (4). By adjusting the distance between the parallel interference pipeline (10) and the to-be-tested target pipeline (8) and the load applied by the loading module (3) to the to-be-tested target pipeline (8), the real working condition of the to-be-tested target pipeline (8) can be simulated. The harmonic power supply (18) loads a harmonic signal to the harmonic magnetic field excitation array coil (35) so as to emit a low-frequency high-frequency harmonic electromagnetic field to the to-be-tested target pipeline (8), and the damage state of the to-be-tested target pipeline (8) can be obtained by collecting and processing a reflection echo signal of the to-be-tested target pipeline (8). According to the harmonic magnetic field diagnosis method and the experimental system, pipeline damage ground excavation-free diagnosis under different parallel distances and different detection heights of the pipelines can be achieved.

Description

technical field [0001] The invention belongs to the field of pipeline damage detection, and in particular relates to a non-contact harmonic magnetic field diagnosis method for parallel pipelines and an indoor experiment system. At the same time, it can simulate pipeline damage at different parallel distances and different detection heights without excavating the ground, and has a structure The advantages of simplicity, convenient adjustment, high detection accuracy, short detection time and low detection cost improve the efficiency of pipeline detection Background technique [0002] External detection technologies for pipe damage mainly include TEM transient electromagnetic method, German NoPig multi-frequency harmonic current method, and Russian MTM magnetic detection technology. High detection rate and other shortcomings, and can only achieve wall thickness thinning detection; MTM detection technology detects the magnetic field of the pipeline itself, resulting in poor ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/82
CPCG01N27/82
Inventor 陈迎春王昌王新华段宇赵以振邓茗
Owner BEIJING UNIV OF TECH
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