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Ultrasonic micro-machined selectable transducer array

  • US 6,115,326 A
  • Filed: 10/22/1998
  • Issued: 09/05/2000
  • Est. Priority Date: 10/22/1998
  • Status: Expired due to Fees
First Claim
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1. A position tracking system operating in a two dimensional system defined by mutually perpendicular x and y coordinates, the position tracking system comprising:

  • a transmitter positioned at a first location for producing a transmitter signal;

    a first array of ultrasonic transducers arranged in a first grid pattern;

    a second array of ultrasonic transducers arranged in a second grid pattern;

    the second array of ultrasonic transducers being offset from the first array of ultrasonic transducers in the x direction;

    said plural ultrasonic transducers being responsive to said transmitter signal to produce plural reactive signals corresponding to said transmitter signal as received at respective ones of said plural ultrasonic transducers; and

    a computer responsive to said reactive signals from said plural ultrasonic transducers for continuously determining the position of said first and second arrays.

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