Magneto-inductive seismic fence
First Claim
1. A seismic detector system comprising:
- at least one sensor module fully buried in one of a ground environment and a water environment to sense seismic vibrations, to generate signals representative of said seismic vibrations and to transmit said representative signals through said one of a ground environment and a water environment via magneto-inductive signals in the ELF to VLF range not to exceed approximately 4000 Hz; and
at least one relay module to receive said magneto-inductive signals in said one of a ground environment and a water environment, to demodulate said representative signals from said magneto-inductive signals, and to broadcast through the air RF signals representative of said demodulated signals.
1 Assignment
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Accused Products
Abstract
An intrusion detector has buried sensor modules arranged along a perimetero sense seismic vibrations caused by intrusions within the area defined by the perimeter. The sensor modules transmit data representative of the intrusions via magneto-inductive signals in the ELF to VLF range through ground, air, and/or water to at least one buried relay module within the area. The relay modules transmit RF signals representative of the intrusion data via a camouflaged RF antenna to mobil or fixed stations for appropriate action. Transmission of magneto-inductive signals in the ELF to VLF range is clandestine and reliable, and locations of buried sensor modules and relay modules are not revealed to intruders to reduce the possibility of evasion or tampering. The sensor modules may have sensor elements sensitive to humans, vehicles, and low flying aircraft to give enforcement officers the opportunity to better utilize their resources where the intrusions are occurring. In addition, this system could be placed along many well-used passageways, such as highways, roads, trails, air corridors, etc. to gather information regarding use of facilities and resources to help governmental officials and planners make intelligent decisions.
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Citations
15 Claims
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1. A seismic detector system comprising:
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at least one sensor module fully buried in one of a ground environment and a water environment to sense seismic vibrations, to generate signals representative of said seismic vibrations and to transmit said representative signals through said one of a ground environment and a water environment via magneto-inductive signals in the ELF to VLF range not to exceed approximately 4000 Hz; and at least one relay module to receive said magneto-inductive signals in said one of a ground environment and a water environment, to demodulate said representative signals from said magneto-inductive signals, and to broadcast through the air RF signals representative of said demodulated signals. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for detecting seismic vibrations in a ground environment or a water environment, comprising the steps of:
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fully burying at least one sensor module in one of a ground environment and a water environment; sensing seismic vibrations in said one of a ground environment and a water environment using said at least one sensor module; generating signals representative of said seismic vibrations using said at least one sensor module; transmitting said representative signals from said at least one sensor module through said one of a ground environment and a water environment via magneto-inductive signals in the ELF to VLF range not to exceed 4000 Hz. - View Dependent Claims (8, 9, 10, 11)
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12. An intrusion detector system comprising:
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first means fully buried in one of a ground environment and a water environment for sensing vibrations caused by intruders and for generating intrusion signals representative of said vibrations; second means fully buried in said one of a ground environment and a water environment and coupled to said first means for transmitting said intrusion signals through said one of a ground environment and a water environment via magneto-inductive signals in the ELF to VLF range not to exceed approximately 4000 Hz; third means fully buried in said one of a around environment and a water environment for receiving said magnet-inductive signals and for demodulating said intrusion signals therefrom to form demodulated signals; and fourth means coupled to said demodulating means for broadcasting through the air RF signals representative of said demodulated signals. - View Dependent Claims (13, 14, 15)
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Specification