Discrimination method of a metal detector based on time constant spectrum
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United States of America Patent
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Aug 30, 2016
Grant Date -
Feb 11, 2016
app pub date -
Apr 24, 2014
filing date -
Apr 26, 2013
priority date (Note) -
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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.
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