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Techniques for imaging wireless power delivery environments and tracking objects therein

  • US 9,971,015 B2
  • Filed: 11/19/2015
  • Issued: 05/15/2018
  • Est. Priority Date: 04/10/2015
  • Status: Active Grant
First Claim
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1. A method of tracking objects in a wireless power delivery environment, the method comprising:

  • receiving, by multiple adaptively-phased radio frequency antennas of a wireless power delivery system, sequential beacon signals transmitted by multiple power receiver clients respectively in the wireless power delivery environment and responsively transmitting wireless power to the power receiver clients;

    generating, by the wireless power delivery system, a phase pattern for each received beacon signal,wherein the phase pattern includes a measured phase of the received beacon at each of the multiple adaptively-phased radio frequency antennas;

    comparing the phase pattern to an expected phase pattern for each received beacon signal to identify phase differences,wherein the expected phase pattern includes an expected phase of the received beacon signal at each of the multiple adaptively-phased radio frequency antennas;

    processing the phase differences to identify one or more non-static objects within the wireless power delivery environment, wherein the non-static objects do not transmit beacon signals to the wireless power delivery system; and

    tracking movement data associated with the one or more non-static objects within the wireless power delivery environment based on a three-dimensional image of the wireless power delivery environment and the phase differences,wherein the three-dimensional image identifies shapes and relative locations of static objects within the wireless power delivery environment.

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