Discrimination method of a metal detector based on time constant spectrum
AssigneeMinelab Electronics Pty Limited
InventorPhilip Shane Wahrlich
Life of this patent
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Abstract
A method for detecting a target in a soil using a metal detector, including: 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; processing the receive signal for producing a set of data which has effects of signals from the soil reduced therein or removed therefrom; producing at least two components of a form of at least one time constant spectrum based on the set of data; and producing, at least one indicator output signal based on the at least two components for indicating the presence and/or identity of the target when the target is within, an influence of the transmit magnetic field.
Claims19
A method for detecting a target in a soil using a metal detector, comprising:
- generating a transmit magnetic field, using a transmit coil, for transmission into the soil based on a transmit signal;
- receiving a receive magnetic field, using a receive coil, to provide a receive signal induced by the receive magnetic field;
- processing the receive signal, using a processor, for producing a set of data which has effects of signals from the soil reduced therein or removed therefrom;
- producing, using the processor, at least two components of a form of at least one time constant spectrum based on the set of data to represent the target;
- and
- producing, using the processor, at least one indicator output signal based on the at least two components for indicating at least one of a presence and an identity of the target when the target is within an influence of the transmit magnetic field;
- wherein each of the at least two components corresponds to a time constant within the at least one time constant spectrum.
Dependencies are inferred from the claim text.