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Movable body detecting/notifying system

  • US 6,696,975 B2
  • Filed: 02/25/2002
  • Issued: 02/24/2004
  • Est. Priority Date: 06/05/1998
  • Status: Expired due to Fees
First Claim
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1. A movable body detecting/notifying system for allowing a detecting movable body to detect and report a detected movable body by using electromagnetic wave communication, comprising:

  • means mountable to the detecting movable body for receiving information on a position of the detected movable body from a traffic regulating center, the traffic regulating center receiving information on positions of movable bodies within a predetermined range;

    means mountable to the detected movable body for transmitting a large wavelength electromagnetic wave easily diffractable by an obstruction and a small-wavelength electromagnetic wave not easily diffractable by an obstruction; and

    when said information on the position of the detected movable body indicates that said detected movable body is moving in a particular direction, said detecting movable body generates a caution signal upon reception of said large wavelength electromagnetic wave to produce a first notice upon reception of small-wavelength electromagnetic wave when the detected movable body is hidden by an obstruction, or a second notice upon reception of said small-wavelength electromagnetic wave when the detected movable body appears from behind the obstruction.

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