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ULTRASONIC COMMUNICATION SYSTEM

  • US 20170126332A1
  • Filed: 11/26/2014
  • Published: 05/04/2017
  • Est. Priority Date: 12/02/2013
  • Status: Active Grant
First Claim
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1. A sensor network comprising:

  • a sink coupled to a substrate and configured to transmit a periodic ultrasonic pulse on the substrate; and

    a plurality of sensor nodes, wherein a first sensor node of the plurality of sensor nodes is coupled to the substrate and is configured to;

    receive the periodic ultrasonic pulse from the substrate,synchronize an internal clock of the first sensor node to the sink based on the periodic ultrasonic pulse,selectively detect an event in a region surrounding the first sensor node, andin response to detecting the event, transmit a first ultrasonic pulse toward the sink on the substrate.

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