Patent ID: 7479878

Claim:
A flexible sensor cable for use in an intrusion detection system having a processor, the flexible sensor cable having an input and an output for coupling to the processor, the flexible sensor cable comprising: a first electrically conductive cable member; a second electrically conductive cable member; an air separator and a plastic electrically insulating member both being disposed between the first conductive cable member and the second conductive cable member; the first electrically conductive cable member having one surface in contact with the air separator and being freely movable within the air separator relative to the plastic electrically insulating member, such that the flexible sensor is capable of providing impedance change in response to a disturbance; and the plastic electrically insulating member being made of a material selected based on triboelectric series properties and being processed such that the flexible sensor cable is capable of producing a terminal voltage with acceptable signal to noise in response to a disturbance.