A Method of Noncontact Measurements of Currents for Control over Corrosion Protection of Underground Pipelines

摘要

We consider the basic principles and potentials ofnoncontact measurements of currents for control over corrosionprotection of underground steel pipelines. The characteristics ofthe magnetic field and a solution of the inverse problem for arectilinear current are analyzed. The necessary and sufficientconditions for the determination of current on measurements ofthe magnetic field above the route are formulated. We describealgorithms, an example of using a BIT-3 noncontact currentmeter, and full-scale tests for the insulation control and cathodicprotection of a main gas pipeline.