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Magnetic infrasound sensor

United States Patent

November 14, 2006
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
A magnetic infrasound sensor is produced by constraining a permanent magnet inside a magnetic potential well above the surface of superconducting material. The magnetic infrasound sensor measures the position or movement of the permanent magnet within the magnetic potential well, and interprets the measurements. Infrasound sources can be located and characterized by combining the measurements from one or more infrasound sensors. The magnetic infrasound sensor can be tuned to match infrasound source types, resulting in better signal-to-noise ratio. The present invention can operate in frequency modulation mode to improve sensitivity and signal-to-noise ratio. In an alternate construction, the superconductor can be levitated over a magnet or magnets. The system can also be driven, so that time resolved perturbations are sensed, resulting in a frequency modulation version with improved sensitivity and signal-to-noise ratio.
Mueller; Fred M. (Los Alamos, NM), Bronisz; Lawrence (Los Alamos, NM), Grube; Holger (Los Alamos, NM), Nelson; David C. (Santa Fe, NM), Mace; Jonathan L. (Los Alamos, NM)
The United States of America as represented by the United States Department of Energy (Washington, DC), N/A (
10/ 932,654
August 31, 2004
STATEMENT OF GOVERNMENT INTEREST The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-36 between the United States Department of Energy and the University of California for the operation of the Los Alamos National Laboratory.