VIRTUAL ELECTRONIC PERIMETER FENCE WITH SOLAR POWERED LIGHTS

摘要

A virtual electronic perimeter fence includes at least a first, second and third fence post each including an emitter for emitting a beam of infrared light a t a predetermined frequency. The first, second and third fence posts include a receiver for receiving the predetermined frequency of infrared light emitted from a designated fence post. A beam of infrared light of a first frequency is emitted from th e first fence post to the second fence post and a beam of infrared light of a second frequency is emitted from the second fence post to the third fence post and infrared ligh t of a third frequency is emitted from the third fence post to the first fence post for providing a virtual electronic perimeter fence that provides an alarm if an interruption occurs in the beam of infrared light while eliminating cross-signals therebetween. A light, sound and video system may be provided.