DETERMINATION OF THE POSITION OF AN UNDERGROUND PIPELINE USING THE RESULTS OF MEASUREMENTS OF ITS MAGNETIC FIELD STRENGTH

摘要

The results of an experiment to determine the position of an underground pipeline using its magnetic field strength when there are other underground systems (cables and pipelines) present, situated side by side, are presented. It is shown that the excitation of a current in the pipe by a current in a wire, grounded at the ends, occurs as a result of magnetic coupling between the wire and the pipe. At a frequency of the exciting current higher than 1 kHz, currents occur in the other nearby pipelines lines which lead to ambiguity and errors in determining the route of the pipeline.