ALERTING SYSTEM FOR A FACILITY
First Claim
1. A method for providing a warning for a facility, comprising:
- receiving an acoustic signal;
classifying a source of the acoustic signal based upon a spectral analysis of a frequency-based domain signature of the acoustic signal;
detecting a distance of the source of the acoustic signal from the facility and an altitude of the source of the acoustic signal relative to the facility based upon the acoustic signal; and
generating the warning (i) when the source of the acoustic signal is classified as a rotary-wing aircraft and (ii) when the detected distance of the source of the acoustic signal from the facility and the detected altitude of the source of the acoustic signal relative to the facility falls within a defined geographical zone relative to the facility.
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Accused Products
Abstract
A surveillance system is configured to detect a rotary-wing aircraft approaching a fixed facility and provide a warning upon detection. The system includes acoustic processing nodes that receive acoustic signals from the environment surrounding the fixed facility. As the nodes receive the acoustic signals, the nodes perform a spectral analysis of the signals to detect if the source of the acoustic signals is a rotary-wing aircraft. Additionally, based upon the acoustic signals, the nodes detect an altitude of the rotary-wing aircraft and a distance between the rotary-wing aircraft and the fixed facility. In the case where the system identifies the rotary-wing aircraft as encroaching a predefined geographical area outside of the facility, based upon the altitude and distance between the rotary-wing aircraft and the facility, the system generates a warning to allow security forces to intercept the rotary-wing aircraft prior to its arrival at the facility.
32 Citations
15 Claims
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1. A method for providing a warning for a facility, comprising:
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receiving an acoustic signal; classifying a source of the acoustic signal based upon a spectral analysis of a frequency-based domain signature of the acoustic signal; detecting a distance of the source of the acoustic signal from the facility and an altitude of the source of the acoustic signal relative to the facility based upon the acoustic signal; and generating the warning (i) when the source of the acoustic signal is classified as a rotary-wing aircraft and (ii) when the detected distance of the source of the acoustic signal from the facility and the detected altitude of the source of the acoustic signal relative to the facility falls within a defined geographical zone relative to the facility. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for cuing a warning signal for a facility, comprising:
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a set of nodes disposed at the facility, each node of the set of nodes carrying a plurality of audio sensors, the set of nodes configured to; receive an acoustic signal from the corresponding plurality of audio sensors; classify a source of the acoustic signal based upon a spectral analysis of a frequency-based domain signature of the acoustic signal; detect a distance of the source of the acoustic signal from the facility and an altitude of the source of the acoustic signal relative to the facility based upon the acoustic signal; and generate the warning (i) when the source of the acoustic signal is classified as a rotary-wing aircraft and (ii) when the detected distance of the source of the acoustic signal from the facility and the detected altitude of the source of the acoustic signal relative to the facility falls within a defined geographical zone relative to the facility. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification