Patent ID: 7419140

Claim:
A security fence section in a fence formed along a boundary, the boundary having a secured side and an unsecured side, comprising: a rectangular base positioned on an underlying surface forming part of the boundary, the base including a first end beam, a second end beam, a first lateral support and a second lateral support, each coupled perpendicular to the first and second end beams, the first end beam positioned closer to said unsecured side of said boundary than said second end beam; a first rectangular fence section extending perpendicular to the base and between a second rectangular fence section extending perpendicular to the base and between the first and second lateral supports substantially near the second end beam, said second fence section including at least two support posts and a section of semi-rigid fencing extending therebetween, said semi-rigid fencing providing a continuous barrier extending from lower portions to upper portions of said at least two support posts; a third rectangular fence section extending from the base near the first end beam to a predetermined point along each of the support posts of the second rectangular fence section to form an acute angle greater than zero degrees between the third section and the rectangular base, said third fence section including at least two support posts coupled between said base and said point along each of said support posts of said second fence section and further including a section of semi-rigid fencing extending therebetween, said semi-rigid fencing providing a continuous barrier extending from the base to said point along each of the support posts of the second fence section; a first sensing module coupled to the second fence section to sense vibrations applied to said second fence section so as to detect intrusion of said boundary from said unsecured side; and a second sensing module coupled to the third fence section to sense vibrations applied to said third fence section so as to detect intrusion of said boundary from said unsecured side.