Object locater and method for locating a metallic and/or magnetizable object
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United States of America Patent
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Aug 21, 2018
Grant Date -
Feb 11, 2016
app pub date -
Feb 14, 2014
filing date -
Apr 4, 2013
priority date (Note) -
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Abstract
A sensor for locating metallic or magnetizable objects comprises two emission coils and a receiving coil which are inductively interconnected. A method for determining the influence of temperature on the sensor includes supplying a first pair of predetermined alternating currents to the emitter coils, and simultaneously sampling current flows which pass through the emitter coils and a first current of the receiver coil. Subsequently, the method includes supplying a second pair of predetermined alternating currents to the emitter coils, and simultaneously sampling current flows which pass through the emitter coils and a second current of the receiver coil. The method further includes determining coupling factors between the emitter coils and the receiver coils based on the determined current flows and voltages, and determining the object based on the coupling factors.
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