Search International and National Patent Collections

1. (WO2017062130) METHOD AND APPARATUS FOR DETECTING METALLIC OBJECTS IN A PREDETERMINED SPACE VIA INDUCTIVE KINEMATIC SENSING

Pub. No.:    WO/2017/062130    International Application No.:    PCT/US2016/050984
Publication Date: Fri Apr 14 01:59:59 CEST 2017 International Filing Date: Sat Sep 10 01:59:59 CEST 2016
IPC: B60L 11/18
G01D 5/20
H01F 38/14
H04B 5/00
H02J 50/12
H02J 50/60
G01V 3/10
Applicants: QUALCOMM INCORPORATED
Inventors: WIDMER, Hans Peter
DAETWYLER, Andreas
SIEBER, Lukas
Title: METHOD AND APPARATUS FOR DETECTING METALLIC OBJECTS IN A PREDETERMINED SPACE VIA INDUCTIVE KINEMATIC SENSING
Abstract:
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.