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    Suppressing thermally induced voltages for verifying structural integrity of materials
    4.
    发明授权
    Suppressing thermally induced voltages for verifying structural integrity of materials 有权

    公开(公告)号：US11609203B2

    公开(公告)日：2023-03-21

    申请号：US17303867

    申请日：2021-06-09

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： David H. Redinger ,  Christopher R. Yungers ,  Jennifer F. Schumacher

    IPC: G01N27/20 ,  G01N33/38

    Abstract: The disclosure describes techniques for detecting a crack or defect in a material. The technique may include applying an electrical signal to a first electrode pair electrically coupled to the material. The technique also may include, while applying the electrical signal to the first electrode pair, determining a measured voltage between a second, different electrode pair. At least one electrode of the second, different electrode pair is electrically coupled to the material. The technique may further include determining a corrected measured voltage by suppressing a thermally induced voltage from the measured voltage and determining whether the material includes a crack or other defect based on the corrected measured voltage.

    System and method for anomaly detection in an electrical network
    6.
    发明授权
    System and method for anomaly detection in an electrical network 有权

    公开(公告)号：US11143685B2

    公开(公告)日：2021-10-12

    申请号：US16647539

    申请日：2018-10-31

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Golshan Golnari ,  Saber Taghvaeeyan ,  Jennifer F. Schumacher

    IPC: G01R31/08

    Abstract: The present subject matter enables early or real-time detection of anomalies in electric networks. In various applications, the system detects anomalies, such as electricity theft, electricity surge, etc. It solves the difficult-to-detect problems in an electrical network, where anomalies like electricity theft or electrical surge may not be found until it has raised numerous concerns or complaints, or has created a significant impact on infrastructure functionality, service quality, or cost. In addition, the present subject matter decreases the requirement for large number of sensors and provides more cost effective and scalable solutions. The present subject matter provides a method for determining where a detected anomaly is occurring within an electrical network. Variations of the present subject matter include anomaly identification systems for addressing anomalies in large networks. Various applications of the present subject matter provide guidance or effective placement of sensors in the electrical network.

    Electrode placement for verifying structural integrity of materials
    8.
    发明授权
    Electrode placement for verifying structural integrity of materials 有权

    公开(公告)号：US11609202B2

    公开(公告)日：2023-03-21

    申请号：US17301082

    申请日：2021-03-24

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： David H. Redinger ,  Christopher R. Yungers ,  Eric M. Chinnock ,  Jennifer F. Schumacher

    IPC: G01N27/20 ,  G01N27/04

    Abstract: A technique may include applying a first electrical signal to a first pair of drive electrodes, and, while applying the first electrical signal to the first pair of drive electrodes, determining a first measured voltage using a first measurement electrode. The technique further may include applying a second electrical signal to a second pair of drive electrodes, and, while applying the second electrical signal to the second pair of drive electrodes, determining a second measured voltage using a second, different measurement electrode. The first pair of drive electrodes, the second pair of drive electrodes, the first measurement electrode, and the second, different measurement electrode may from a set of N electrodes electrically coupled to the material. The technique also may include determining whether the material includes a crack or other defect based on a comparison between the first measured voltage and the second measured voltage.

    Impairment detection with environmental considerations
    9.
    发明授权
    Impairment detection with environmental considerations 有权

    公开(公告)号：US11324421B2

    公开(公告)日：2022-05-10

    申请号：US15511318

    申请日：2015-09-15

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： James W. Howard ,  Eric C. Lobner ,  Jennifer F. Schumacher

    IPC: A61B5/11 ,  A61B5/00 ,  G16H20/30

    Abstract: A method and system for monitoring impairment indicators. The method comprises, during a first time window, measuring a first movement signal related to movement of a person with a movement sensor associated with the person, and measuring a first environmental signal with an environmental sensor. The method further comprises electronically storing at least one numerical descriptor derived from the first movement signal and the first environmental signal as reference data for the person. The method further includes, during a second time window, measuring a second movement signal related to movement of the person with the movement sensor and measuring a second environmental signal with the environmental sensor; and comparing at least one numerical descriptor derived from the second movement signal and the second environmental signal to the reference data to identify an impairment indicator.

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