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Apparatus for measuring terrain conductivity

  • US 20030184301A1
  • Filed: 04/02/2002
  • Published: 10/02/2003
  • Est. Priority Date: 04/02/2002
  • Status: Active Grant
First Claim
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1. A conductivity meter for measuring conductivity of terrain, including:

  • a first transmitter coil;

    a signal generator connected to the first transmitter coil to supply a time-varying current thereto for inducing eddy currents in the terrain;

    a first receiver coil horizontally spaced from the first transmitter coil;

    a temperature sensing device for measuring temperature; and

    a signal processor, including a memory storing a plurality of temperature dependent correction values, for isolating from a signal received by the first receiver coil a secondary signal representative of a secondary magnetic field generated in the terrain by the eddy currents, and determining an apparent terrain conductivity based on the isolated secondary signal and a selected temperature dependent correction value selected from the stored temperature dependent correction values according to a measured temperature received from the temperature sensing device.

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