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External perimeter monitoring system

  • US 6,937,647 B1
  • Filed: 03/10/2000
  • Issued: 08/30/2005
  • Est. Priority Date: 03/10/2000
  • Status: Expired due to Term
First Claim
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1. A system for monitoring activity along an area bounded by a wire, said system comprising:

  • a single conductor wire defining a boundary around an area;

    at least one sensor in communication with said wire, said at least one sensor for measuring local activity as a measured local activity signal and transmitting said measured local activity signal through said wire;

    a gateway electrically connected to said wire, said gateway for managing transmissions through said wire;

    a digital signal processing device in electrical communication with said gateway, said digital signal processing device for applying a digital filter to each said measured local activity signal to produce a filtered activity signal;

    a processing device in electrical communication with said gateway and said digital signal processing device;

    said processing device for sequencing operation of said monitoring system, communicating with said at least one sensor, and identifying said filtered activity signal to produce an activity identification;

    a power supply providing power to said system, said power supply electrically connected to said gateway for transmitting power through said wire to said sensors; and

    an indicator responsive to said processing device for communicating said activity identification.

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