|Perimeter Intrusion Detection System:|
The digital microphonic cable fence disturbance sensor shall function as an
electronic perimeter intrusion detector. The system shall be used in conjunction
with fences to protect the perimeter of a site. The system shall consist of an
ultraviolet resistant triboelectric transducer cable, and a microprocessor based
dual zone digital signal processor. The system shall be capable of monitoring
different styles of metal fabric fencing such as chain-link, expanded-metal or
welded-mesh fence. The sensor shall detect intruders by utilizing signals generated by the minute flexing of the triboelectric transducer cable, caused by
attempting to cut, climb, or raise the fence fabric. The system shall be capable of
functioning as either a standalone system or as an integral part of a centralized
control and maintenance facility.
The digital signal processor shall analyze the signals from the triboelectric
transducer cable and shall detect minute vibrations in the fabric of the fence.
The processor shall utilize adaptive algorithms, ambient signal compensation
and selectable common-mode rejection, to discriminate between actual, false
and nuisance alarms, without lowering the probability of detection. The processor shall identify, by type, a cut intrusion and a climb intrusion. The
sensor shall have independent adjustments and thresholds for each type of intrusion and shall have the capability to
completely mask climb or cut alarms.