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    Magnetic Beacon Self-Localization Using Mobile Device Magnetometers
    1.
    发明申请
    Magnetic Beacon Self-Localization Using Mobile Device Magnetometers 审中-公开
    磁信号自动定位使用移动设备磁力计

    公开(公告)号：US20160245638A1

    公开(公告)日：2016-08-25

    申请号：US15050554

    申请日：2016-02-23

    Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

    Inventor： Arie SHEINKER ,  Mark B. MOLDWIN

    IPC: G01B7/004

    CPC classification number: G01C21/005 ,  G01C21/206

    Abstract: A computer-implemented method for determining position of a mobile device using magnetic beacons including detecting, by a sensor in the mobile device, a magnetic signal having a unique signature associated with a given magnetic beacon; storing location and an associated signature for each of a plurality of magnetic beacons in a data store of the mobile device, where each of the magnetic beacons is assigned a different signature; extracting the unique signature from the magnetic signal; comparing the extracted signature to each of the signatures stored in the data store; identifying a given magnetic beacon from the plurality of magnetic beacons, where signature for the given beacon matches the extracted signature; and retrieving the location for the given magnetic beacon for the data store and correlating location of the mobile device with the location of the given magnetic beacon.

    Abstract translation: 一种用于使用磁信标确定移动设备的位置的计算机实现的方法，包括通过所述移动设备中的传感器检测具有与给定磁信标相关联的唯一签名的磁信号; 为移动设备的数据存储器中的多个磁信标中的每一个存储位置和相关联的签名，其中每个磁信标被分配不同的签名; 从磁信号中提取唯一签名; 将提取的签名与存储在数据存储中的每个签名进行比较; 从所述多个磁信标识别给定的磁信标，其中所述给定信标的签名与所提取的签名匹配; 以及检索用于数据存储器的给定磁信标的位置，并将移动设备的位置与给定磁信号的位置相关联。

    Wavelet-Adaptive Interference Cancellation For Underdetermined Platforms
    2.
    发明申请
    Wavelet-Adaptive Interference Cancellation For Underdetermined Platforms 有权

    公开(公告)号：US20250020739A1

    公开(公告)日：2025-01-16

    申请号：US18768522

    申请日：2024-07-10

    Applicant: The Regents of The University of Michigan

    Inventor： Alex HOFFMANN ,  Mark B. MOLDWIN

    IPC: G01R33/02 ,  G01R33/025

    Abstract: An interference removal technique, called Wavelet-Adaptive Interference Cancellation for Underdetermined Platforms (WAIC-UP), is provided to effectively eliminate stray magnetic field signals using multiple magnetometers, without requiring prior knowledge of the spectral content, location, or magnitude of the interference signals. WAIC-UP capitalizes on the distinct spectral properties of various interference signals and employs an analytical method to separate them from ambient magnetic field in the wavelet domain.

    Space Weather Monitor System
    3.
    发明申请
    Space Weather Monitor System 有权

    公开(公告)号：US20220365148A1

    公开(公告)日：2022-11-17

    申请号：US17741723

    申请日：2022-05-11

    Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

    Inventor： Mark B. MOLDWIN ,  Lauro V. OJEDA

    IPC: G01R33/02 ,  G01C21/24 ,  G01W1/10

    Abstract: A magneto-inductive DC magnetometer is provided that is operable to output fluxgate quality measurements in a low mass, volume, power and cost package. The magnetometer enables constellation-class missions not only due to its low-resource requirements, but also due to its potential for commercial integrated circuit fabrication. In addition, the magnetometer will be part of a ground-based Space Weather Underground Citizen Science instrument package that enables dense arrays of space weather-relevant observations at mid-latitudes. The magneto-inductive operating principle is based on a simple resistance-inductor (RL) circuit and involves measurement of the time it takes to charge and discharge the inductor between an upper and lower threshold by means of a Schmitt trigger oscillator. This time is proportional to the inductance that in turn is proportional to the field strength.

    Magnetometer Array System For Small Satellites
    4.
    发明公开
    Magnetometer Array System For Small Satellites 审中-公开

    公开(公告)号：US20240353507A1

    公开(公告)日：2024-10-24

    申请号：US18636339

    申请日：2024-04-16

    Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

    Inventor： Matthew Joseph PELLIONI ,  Finna Hope BRONNER ,  Jacob THOMA ,  Leonardo REGOLI ,  Brady STRABEL ,  Lauro V. OJEDA ,  Mark B. MOLDWIN

    IPC: G01R33/00 ,  G01R33/10

    CPC classification number: G01R33/0094 ,  G01R33/10

    Abstract: A CubeSat magnetometer array system having a housing having CubeSat dimensions, a host computer, and a magnetometer array system. The magnetometer array system includes a circuit board mounted within the housing, a plurality of magnetometers operably mounted on the circuit board, and a microcontroller system operably coupled with the plurality of magnetometers. The microcontroller system is configured to synchronize data from the plurality of magnetometers, utilize machine learning processes to identify and reduce noise in the synchronized data, and output a signal representative of a magnetic field with reduced noise due to the machine learning processes. A communication interface is operably coupled with the host computer and the microcontroller system and configured to communicate the signal to the host computer.

    Magnetometer Array System For Magnetically Noisy Environments
    6.
    发明公开
    Magnetometer Array System For Magnetically Noisy Environments 审中-公开

    公开(公告)号：US20240353504A1

    公开(公告)日：2024-10-24

    申请号：US18636334

    申请日：2024-04-16

    Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

    Inventor： Eftyhia ZESTA ,  Alex HOFFMANN ,  Lauro V. OJEDA ,  Mark B. MOLDWIN

    IPC: G01R33/00 ,  G01V3/38 ,  G01V3/40

    CPC classification number: G01R33/0029 ,  G01V3/38 ,  G01V3/40 ,  G01R33/0094

    Abstract: A system and method for separating spacecraft generated magnetic noise from geomagnetic field data includes detecting magnetic information using a plurality of magnetometers and outputting a representative detection signal, the magnetic information comprising magnetic noise and geomagnetic field data; receiving the representative detection signal including the magnetic information from the plurality of magnetometers and resolving the magnetic noise data and the geomagnetic field data by analyzing a relative gain and phase of the representative detection signal in a time-frequency (TF) domain, if a noise signal of the representative detection signal is sparse in the TF domain then the relative gain and phase is found using cluster analysis, and separating a geomagnetic field data signal from a magnetic noise data signal using cluster centroids in compressive sensing based on the cluster analysis. The system and method further includes outputting a resultant signal representative of at least the geomagnetic field data signal.

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