×

System and method for navigation using two-way ultrasonic positioning

  • US 20030142587A1
  • Filed: 01/25/2002
  • Published: 07/31/2003
  • Est. Priority Date: 01/25/2002
  • Status: Active Grant
First Claim
Patent Images

1. A method of operating a positioning system having a plurality of objects each configured to transmit and receive ultrasonic signals, comprising transmitting an initiating ultrasonic signal from a first one of the plurality of objects, the initiating ultrasonic signal including a code identifying a second one of the plurality of objects for responding to the initiating ultrasonic signal;

  • transmitting a responding ultrasonic signal from the second one of the plurality of objects;

    receiving the responding ultrasonic signal at the first one of the plurality of objects; and

    determining a distance between the first one and the second one of the plurality of objects based on a time period starting at the transmission of the initiating ultrasonic signal and ending at the reception of the responding ultrasonic signal.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×