Metal Detector
AssigneeMinelab Electronics Pty Limited
InventorPhilip Shane Wahrlich
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Abstract
Provided is a method to detect at least one target using a handheld metal detector including transmitting a transmit magnetic field using a transmitter; receiving a receive magnetic field using a receiver to produce one or more receive signals; processing the one or more receive signals to produce a plurality of different processed signals; forming a representation of a vector subspace based on the plurality of different processed signals; processing the representation of the vector subspace with each of a plurality of target models individually to determine a closeness from each of the plurality of target models to the vector subspace; and producing an indicator output indicative of the presence of at least one target based on the closeness from each of the plurality of target models to the vector subspace.
Claims20
A method to detect at least one target using a handheld metal detector, comprising:
- transmitting a transmit magnetic field using a transmitter;
- receiving a receive magnetic field using a receiver to produce one or more receive signals:
- processing the one or more receive signals to produce a plurality of different processed signals:
- forming a representation of a vector subspace based on the plurality of different processed signals:
- processing the representation of the vector subspace with each of a plurality of target models individually to determine a closeness from each of the plurality of target models to the vector subspace:
- and
- producing an indicator output indicative of the presence of at least one target based on the closeness from each of the plurality of target models to the vector subspace.
Dependencies are inferred from the claim text.