Title :
Analysis of alternating magnetic field location technology of buried pipe lines
Author :
Honda, S. ; Miyamoto, Y.
Author_Institution :
Fac. of Eng., Kumamoto Univ., Japan
fDate :
9/1/1989 12:00:00 AM
Abstract :
The magnetic field induced by currents flowing through the ground between a buried pipe and an earth contact electrode is analyzed and numerically evaluated under the assumptions of homogeneous soil of pure resistance and quasi-steady field in order to clarify and to increase the accuracy of alternating magnetic field location technology. An effective formula for the evaluation of the magnetic field induced by underground current is developed. The theory evaluates the magnetic field with about 80% accuracy, providing more precise location. The time required for the evaluation is greatly reduced by the development of a table lookup algorithm. Experimental measurement of magnetic fields on an open space agree well with the numerical evaluations in spite of the use of idealized assumptions
Keywords :
electromagnetism; magnetic field effects; position measurement; alternating magnetic field location technology; assumptions; buried pipe lines; earth contact electrode; homogeneous soil of pure resistance; numerically evaluated; pipe location; quasi-steady field; table lookup algorithm; underground current; Contact resistance; Electrical resistance measurement; Electrodes; Grounding; Magnetic analysis; Magnetic field measurement; Magnetic fields; Signal processing algorithms; Soil; Space technology;
Journal_Title :
Magnetics, IEEE Transactions on
