Object detection for wireless energy transfer systems

  • US 9,952,266 B2
  • Filed: 02/13/2015
  • Issued: 04/24/2018
  • Est. Priority Date: 02/14/2014
  • Status: Active Grant
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First Claim
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1. A living object detector for a wireless energy transfer system, comprising:

  • a sensor comprising a first conductor positioned adjacent to a first surface of a substrate;

    a shield comprising a second conductor different from the first conductor, wherein at least a portion of the second conductor is positioned proximal to the first conductor and adjacent to the first surface of the substrate;

    a ground reference comprising a third conductor spaced from the substrate and positioned on a side of the substrate opposite to the first surface, wherein during operation of the living object detector, the third conductor is maintained at a ground reference electrical potential;

    first and second switches; and

    an electrical circuit coupled to the first, second and third conductors and to the first and second switches, and configured so that during the operation of the living object detector;

    the electrical circuit applies a first electrical potential to the first conductor and a second electrical potential to the second conductor, the first and second electrical potentials being approximately similar; and

    the electrical circuit can charge and discharge the first conductor by activating the first and second switches.

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