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Buried iron pipeline detection and accurate positioning method based on magnetic field indirect detection

It is a technology of precise positioning and magnetization field, which is applied in the direction of electric/magnetic exploration, measurement device, and re-radiation of sound waves, so as to reduce the cost of use, improve the detection accuracy, and have a wide range of applications.

Active Publication Date: 2017-04-19
SOUTHWEST PETROLEUM UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a buried subway pipeline detection and accurate positioning method based on the indirect detection of the magnetization field in view of the existing problems in the detection and positioning of the total magnetic anomaly of the buried subway pipeline

Method used

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  • Buried iron pipeline detection and accurate positioning method based on magnetic field indirect detection
  • Buried iron pipeline detection and accurate positioning method based on magnetic field indirect detection
  • Buried iron pipeline detection and accurate positioning method based on magnetic field indirect detection

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Embodiment

[0029] Such as figure 2 It is an operation flowchart of the buried subway pipeline detection and precise positioning method based on the indirect detection of the magnetization field. In this embodiment, the specific operation process is as follows: nine small three-axis magnetic field sensors with an accuracy of 1nT are installed at intervals of 10cm On the aluminum detection bracket, the nine measuring points of the three-axis magnetic field sensor are located on the same straight line, and the three axial directions of the sensor are respectively corresponding to the same; the instrument is adjusted so that the difference in the magnetic field measurement values ​​of the same axis of different sensors in the uniform magnetic field is as small as possible less than 1nT .

[0030] Use the linear detection array to measure and calculate the anomalous distribution of the magnetic induction intensity of the magnetization field along the preliminary detection path with a length ...

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Abstract

The invention belongs to the field of underground pipeline detection, and particularly relates to a pipeline detection and positioning method based on buried iron pipeline magnetic field indirect detection. According to the specific realization method, three-axis magnetic field sensors are used for forming a linear detection array, abnormal distribution of magnetic induction intensity near the surface is detected in a detected area along a linear detection path, a detection magnetic field tri-component far away from the magnetic induction intensity abnormal peak point in the detection path and little influenced by the magnetic abnormal condition is used as a background magnetic field, the background magnetic field tri-component is subtracted from a detection magnetic field tri-component on each measurement point, vectors are solved as magnetic fields, and the peak connection of the obtained magnetic fields detected and calculated by each path of probe is used for positioning horizontal distribution of the underground pipeline. The pipeline is accurate to detect and position, the equipment cost and the use cost are low, and the instrument is easy to make.

Description

technical field [0001] The invention belongs to the field of detection of underground pipelines, in particular to a method for detection and precise positioning of buried subway pipelines based on the indirect detection of magnetization fields. Background technique [0002] Due to historical, cultural and geological changes, the distribution information of underground pipelines is unclear, which often causes leakage or cutting of underground pipelines in the process of dense pipeline laying, road construction excavation, engineering survey and construction piling, resulting in oil and gas leakage, Safety accidents such as water and electricity interruptions seriously affect the normal production of industry and agriculture and people's daily life. Therefore, before the construction of the project, it is extremely important to find out whether there are underground pipelines in the construction area and determine the horizontal distribution of the pipelines. [0003] There a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08
CPCG01V3/081
Inventor 郭智勇张禾梁海波秦连升靳涛赖欣邹佳玲李国亮
Owner SOUTHWEST PETROLEUM UNIV
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