Mobile robot guidance and navigation system

  • US 5,165,064 A
  • Filed: 03/22/1991
  • Issued: 11/17/1992
  • Est. Priority Date: 03/22/1991
  • Status: Expired due to Fees
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First Claim
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1. In a mobile robot of the type havinga. a vision system employing at least one array of ultrasonic transducers in which each transducer is arranged to monitor its own sector of the robot'"'"'s workspace;

  • b. means for simultaneously activating a plurality of the transducers in the array whereby each activated transducer transmits a pulse of ultrasonic energy, the improvement for reducing crosstalk comprisingi. a horn fronting each activated transducer, the horn flaring at an angle related to the extent of the sector monitored by the transducer; and

    ii. ultrasonic energy absorptive material covering at least part of each horn'"'"'s surface.

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