Transportation monitoring system for detecting the approach of a specific vehicle

  • US 6,958,701 B1
  • Filed: 06/04/2003
  • Issued: 10/25/2005
  • Est. Priority Date: 06/05/2002
  • Status: Active Grant
First Claim
Patent Images

1. A system for detecting the approach of a vehicle, comprising:

  • a vehicle transmitter which operatively transmits at least one code beyond said vehicle transmitter;

    a code generator that generates a representative code selected from a plurality of codes which is representative of said vehicle transmitter and discernable from others of said plurality of codes, said code generator operatively coupled to said vehicle transmitter to couple said representative code to said vehicle transmitter for transmission of a signal therefrom;

    a receiver remote from said vehicle transmitter having a signal receiver operatively monitoring transmitted signals from said vehicle transmitter at a signal strength at said receiver of at least a first threshold and having a code demodulator responsive to said signal receiver extracting said representative code from said signal;

    a code detector comparing said representative code to at least one user-selected code and generating an indication of identity therewith; and

    a lock-out for preventing said generation of indication of identity with said at least one user-selected code.

View all claims

    Thank you for your feedback