Systems, methods, and apparatus for detection of metal objects in a predetermined space

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United States of America Patent

PATENT NO 10627257
APP PUB NO 20170328740A1
SERIAL NO

15663468

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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This disclosure provides systems, methods and apparatus for detecting foreign objects. In one aspect an apparatus for detecting a presence of an object is provided. The apparatus includes a resonant circuit having a resonant frequency. The resonant circuit includes a sense circuit including an electrically conductive structure. The apparatus further includes a coupling circuit coupled to the sense circuit. The apparatus further includes a detection circuit coupled to the sense circuit via the coupling circuit. The detection circuit is configured to detect the presence of the object in response to detecting a difference between a measured characteristic that depends on a frequency at which the resonant circuit is resonating and a corresponding characteristic that depends on the resonant frequency of the resonant circuit. The coupling circuit is configured to reduce a variation of the resonant frequency by the detection circuit in the absence of the object.

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Patent Owner(s)

  • WITRICITY CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bittner, Markus Sarmenstorf, CH 23 634
Fischer, Marcel Boniswil, CH 21 450
Sieber, Lukas Olten, CH 104 14931
Widmer, Hanspeter Wohlenschwil, CH 79 15892

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