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Tracking system

  • US 10,528,856 B2
  • Filed: 05/02/2017
  • Issued: 01/07/2020
  • Est. Priority Date: 04/29/2016
  • Status: Active Grant
First Claim
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1. A tracking system comprising:

  • a tag reader comprising an interrogating antenna;

    one or more tags comprising;

    an electrical energy generator configured to convert environmental energy to electrical energy, wherein the electrical energy generator is more than one generation element selected from;

    a mechanical to electrical energy convertor;

    a thermoelectric generator;

    a solar electricity generator;

    a piezo generator; and

    an RF power generatora control circuit configured to manage the electrical energy generated by the more than one generation elements;

    a radio frequency, RF, communication circuit;

    one or more sensors;

    a controller configured to;

    use the electrical energy generated by the electrical energy generator to transmit a data signal to the tag reader using the RF communication circuit and include data generated by the one or more sensors in the data signal;

    an energy storage device configured to store electrical energy provided by the electrical generator and to supply the stored electrical energy for use by the controller and RF communication circuit; and

    a management unit configured to prevent the tag from operating when insufficient power is available.

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