Patent ID: 9239400
Filing Date: 2016-01-19
CPC Classification: G01V

Claim Text:
1. A method for detecting electrically conductive targets in soil comprising: generating a transmit magnetic field for transmission into the soil based on a transmit signal; receiving a receive magnetic field; providing a receive signal induced by the receive magnetic field; selecting at least two models, each approximating a form of a signal due to a different type of source; processing the receive signal using the at least two models to produce at least two independent signals, each representing a component of the receive signal due to a different type of source; and producing, based on at least two independent signals, an indicator output signal indicative of the presence of the electrically conductive target; wherein the at least two models selected are two of the following models: a model representing signals due to all ferrous objects, a model representing signals due to all non-ferrous objects, and a model representing signals due to soil.