Accurate Electromagnetic Measuring Method and Pipeline Instrument Device of Underground Pipeline Depth

Abstract

The invention discloses an accurate electromagnetic measuring method for the depth of underground pipelines and a pipeline instrument device. The operator holds the pipeline instrument device on the ground directly above the buried pipeline to measure the axis and lead of the top air-core coil and the bottom air-core coil. The included angle in the vertical direction, and the included angle between the central axis of the top air-core coil and the bottom air-core coil and the vertical direction, the inclination sensor in the pipeline instrument device is used to correct the electric current measured by the top air-core coil and the bottom air-core coil respectively. The magnetic induction intensity is the top electromagnetic induction intensity value and the bottom electromagnetic induction intensity value, as well as the distance value between the top air-core coil and the bottom air-core coil, so as to obtain a more accurate buried depth value of the ultra-deep pipeline underground pipeline. The invention is simple to implement, and the measurement deviation caused by the inaccurate measurement position of the locator can be eliminated only by the pipeline instrument device with the inclination sensor, and the measurement accuracy of the buried depth of the ultra-deep pipeline can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of detection and application of underground pipelines, in particular to an accurate electromagnetic measurement method for the depth of underground pipelines and a pipeline instrument device. Background technique [0002] It is known that buried pipelines are widely used in the long-distance transportation of oil and natural gas, and in the field of district heating for combined heat and power generation in cities and towns. For the existing underground pipeline detection method, the electromagnetic method is used to locate the conventionally buried metal pipeline technology. Transmit to the pipeline to be detected, use the signal receiver to apply the peak / valley value detection mode, and accurately locate the route and direction of the pipeline on the ground, and the difference in the induced signal strength measured by the two vertically arranged horizontal coils of the receiver , so that the distance be...

AI Technical Summary

Problems solved by technology

At this time, if the fuselage of the locator cannot be kept vertical to the ground, it will directly affect the measurement accuracy of the buried depth of the ultra-deep pipeline. It cannot meet the high-precision measurement requirements in engineering. Accurate measurement of the depth of ultra-deep underground pipelines is of great significance for subsequent projects in pipeline laying areas and ensuring pipeline safety to avoid third-party damage

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