| 摘要 |
A system for protecting strategic facilities against terrorists by providing perimeter intrusion detection and deterrence is realized by employing sensors operating in "solar blind" region of the ultraviolet spectrum. Such sensors are unique in that their performance is not background noise limited, as well as operable under low visibility conditions. In one preferred embodiment, the inventive "terrorist shield" system comprises two shields surrounding a strategic facility. A detection shield arranged along a circumference at a known radius from the center of the strategic facility serves as the primary means of detection. The detection shield employs UV sources and sensors housed in poles arranged equidistant along the outer circumference of the detection shield. The system also includes a deterrent shield, representing the countermeasures employed in thwarting the terrorist as he approaches or nears the lethal range of the facility. An assessment area between the two shields allows for covert threat assessment that is afforded by imaging systems. This assessment area uses interior covert UV beams that criss-cross to assist in tracking the movement of the terrorist. Depending upon the circumstances, the operator can take different countermeasures.
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