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|1. (WO2017062130) METHOD AND APPARATUS FOR DETECTING METALLIC OBJECTS IN A PREDETERMINED SPACE VIA INDUCTIVE KINEMATIC SENSING|
|Inventors:||WIDMER, Hans Peter
|Title:||METHOD AND APPARATUS FOR DETECTING METALLIC OBJECTS IN A PREDETERMINED SPACE VIA INDUCTIVE KINEMATIC SENSING|
An apparatus for detecting a presence of an object is provided. The apparatus comprises an inductive sensing coil that is configurable to generate a magnetic field, the inductive sensing coil configured to have an electrical characteristic that is detectable when generating the magnetic field. The apparatus comprises an actuator configured to inducing relative motion between the inductive sensing coil and the object while the inductive sensing coil generates the magnetic field. The apparatus comprises a controller configured to detect a change in the electrical characteristic, and determine a presence of the object based on the change in the electrical characteristic correlating with the relative motion between the inductive sensing coil and the object. The electrical characteristic comprises one or more of an equivalent resistance, an equivalent inductance, an equivalent impedance, and an impulse response of the inductive sensing coil.