POSITION DETECTING METHOD FOR BURIED CONDUCTOR

摘要

PURPOSE:To improve the detection accuracy of a burying position and to evaluate the reliability of the detection result by obtaining plural data on a line of intersection of two planes crossing a magnetic field at right angles and calculating their mean value with respect to all combinations of two points on both sides of the rack center of magnetic sensors fixed both ends of a rack. CONSTITUTION:Plural magnetic sensors which detect a magnetic field direction are fixed on substantially the same plane nearby both ends of the long rack 3, which this rack 3 is installed on the ground surface closely right above a buried conductor for a method which supplies a current to the buried conductor 1 to find its position. Then, the magnetic field direction is measured at plural positions on the ground surface and data on lines of intersection of two planes crossing the magnetic field at right angles are found with respect to all combinations of two points on both sides of the rack center of the magnetic sensors fixed nearby both ends of the rack. Then their mean value is calculated to obtain the measurement position of the burying position with high reliability, and variance in the measurement result (e.g. standard deviation) is found to evaluate the reliability.