Buried iron pipeline detection and accurate positioning method and device

Abstract

The invention belongs to the field of underground pipeline detection, and particularly relates to a buried iron pipeline detection and accurate positioning method and device based on magnetic anomaly vertical component analytic signal detection. The method particularly comprises the steps that multiple parallel detection paths are delimited on the ground of a detected region, magnetic anomaly analytic signal detectors are used for forming a linear array, magnetic anomaly vertical component analytic signals caused by buried iron pipelines are detected along the delimited tracks, four single-axis magnetic field sensors measure magnetic anomaly vertical components simultaneously, an analytic signal at the center of the cross is obtained through calculation and uploaded to a computer, detection surface analytic signal strength distribution is drawn on the computer, and existence and horizontal positions and orientations of the underground iron pipelines are indicated in a graph visualization mode. According to the buried iron pipeline detection and accurate positioning method and device, pipeline detection positioning is accurate, the use cost is low, instruments are easy to manufacture, and the economic benefit is significant.

Description

Technical field [0001] The invention belongs to the field of underground pipeline detection, and in particular relates to a method and device for detecting and precise positioning of buried underground pipelines based on magnetic anomaly vertical component analytical signal detection. Background technique [0002] Due to historical, cultural, and geological changes, the information on the distribution of underground pipelines is unclear, leading to dense pipeline laying, road construction excavation, engineering surveys, and leakage or excavation of underground pipelines during piling construction, causing oil and gas leakage. , Water and electricity interruption and other safety accidents have seriously affected the normal production of industry and agriculture and people's daily life. Therefore, it is extremely important to ascertain the distribution information of underground pipelines in the construction area before project construction. [0003] There are many types of underg...

AI Technical Summary

Problems solved by technology

The pipeline robot tracking method calculates the trajectory of the pipeline based on the three-dimensional coordinates of the initial starting point and the distances and changing angles of the points recorded during the progress of the robot. This method is not applicable to pipes with varying diameters

The premise of the infrared thermal imaging method is that there is a temperature difference between the pipeline and the surrounding medium, so the applicability of this method is easily affected when the ambient temperature is high in summer

[0006] At present, the detection of magnetic anomalies in underground iron pipelines is mainly based on the detection of total magnetic anomalies. During the detection, three magnetic field components need to be measured at the same time. This will not only increase the cost of detection equipment, but also affect the accuracy of magnetic anomaly detection.

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