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    • 4. 发明授权
    • Magnetic infrasound sensor
    • 磁次声传感器
    • US07134342B1
    • 2006-11-14
    • US10932654
    • 2004-08-31
    • Fred M. MuellerLawrence BroniszHolger GrubeDavid C. NelsonJonathan L. Mace
    • Fred M. MuellerLawrence BroniszHolger GrubeDavid C. NelsonJonathan L. Mace
    • G01P15/105G01P15/08
    • G01V1/181
    • 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.
    • 通过在超导材料表面上方的磁势阱内约束永磁体来产生磁次声传感器。 磁次声传感器测量永磁体在磁势阱内的位置或运动,并解释测量结果。 次声源可以通过组合来自一个或多个次声传感器的测量结果来定位和表征。 可以调节磁次声传感器以匹配次声源类型,从而获得更好的信噪比。 本发明可以在频率调制模式下工作,以提高灵敏度和信噪比。 在替代结构中,超导体可以悬浮在磁体或磁体上。 该系统也可以被驱动,从而感测时间分辨的扰动,导致具有改善的灵敏度和信噪比的频率调制版本。