Patent ID: 8773133
Filing Date: 2014-07-08
Classification: G01V

Abstract:
1. A portable locator system for locating hidden objects characterized by an electromagnetic (EM) field emission, the system comprising: an EM sensor array configured for detecting a cylindrical field emission corresponding to a line source and producing a time-varying sensor signal S(t); an analog-to-digital converter (ADC) apparatus coupled to the EM sensor array for producing a sequence of digital samples {D(t)} corresponding to the time-varying sensor signal S(t); a processor coupled to the sequence of digital samples {D(t)} for producing a frequency spectrum signal {P(f)} representing the sensor signal S(t) energy within each of a first plurality of predetermined frequency intervals responsive to the sequence of digital samples {D(t)}; at least one adaptive filter coupled to the processor for producing a filter output signal F(t) representing the sensor signal energy within each of a second plurality of predetermined frequency intervals, wherein the second plurality of predetermined frequency intervals has a number of predetermined frequency intervals that is less than a number of predetermined frequency intervals in the first plurality of predetermined frequency intervals, selected responsive to the spectrum signal {P(f)}; and a user interface (UI) coupled to the processor for indicating the presence of one or more hidden objects responsive to the filter output signal F(t).