Patent ID: 6937647

Claim:
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.