Patent ID: 6911823
Filing Date: 2005-06-28
Classification: G01V

Abstract:
1. A method for characterizing a target metal object in ground, comprising: (a) characterizing the ground at two distinct sinusoidal frequencies of interrogation; (b) characterizing the target metal object in the ground at said two frequencies: (c) characterizing a plurality of reference metal objects apart from the ground at said two frequencies; (d1) computing a respective first number for each of said reference metal objects using the characterizations of said steps (a) and (c); (d2) computing a second number for the target, metal object using the characterization of step (b); (e) comparing said first and second numbers; and (f) characterizing the target metal object with the result of the comparison of said step (e), wherein the characterizing step (a) provides for determining at least the ratios (Y