Patent ID: 6710599
Filing Date: 2004-03-23
Classification: G01V

Abstract:
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 including a sensor positioned proximate to the first receiver coil for measuring a temperature of the first receiver coil; 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.