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    System for audibly detecting precursors of material fracture for a specimen under test
    1.
    发明授权
    System for audibly detecting precursors of material fracture for a specimen under test 有权

    公开(公告)号：US11624730B2

    公开(公告)日：2023-04-11

    申请号：US17374173

    申请日：2021-07-13

    Applicant: GM Global Technology Operations LLC

    Inventor： Bradley Allen Newcomb ,  Nathan Thompson

    IPC: G01N29/14 ,  G01N29/06 ,  G01N29/12

    Abstract: A system for determining a trigger amplitude indicating a precursor to a material fracture in a specimen under test includes a microphone converting acoustic emission emitted by the specimen under test into electrical signals. A load is exerted upon the specimen under test and the acoustic emission are emitted when the load causes the specimen under test to undergo deformation prior to the material fracture. A control module is in electrical communication with the microphone and executes instructions to monitor the electrical signals generated by the microphone and filter the electrical signals generated by the microphone. The control module converts the electrical signals generated by the microphone into individual frequency components based on a fast Fourier Transform (FFT). The individual frequency components each include a peak intensity. The control module determines the trigger amplitude based on the peak intensity of the individual frequency components of the FFT.

    VARIABLE TRANSMITTANCE LAMINATE WITH EMBEDDED THERMALLY CONDUCTIVE MULTI-LAYER
    6.
    发明申请
    VARIABLE TRANSMITTANCE LAMINATE WITH EMBEDDED THERMALLY CONDUCTIVE MULTI-LAYER 有权

    公开(公告)号：US20250084227A1

    公开(公告)日：2025-03-13

    申请号：US18462769

    申请日：2023-09-07

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Jonglee Park ,  Julien P. Mourou ,  Yujie Guo ,  Bradley Allen Newcomb

    IPC: C08J7/044 ,  C08J7/04 ,  C08J7/054

    Abstract: Aspects of the disclosure include variable transmittance laminates having an embedded thermally conductive multi-layer for auto-shading applications. An exemplary vehicle includes a lighting system having a light source and a housing for the light source. A variable transmittance laminate is positioned such that light emitted from the housing passes through the variable transmittance laminate. The variable transmittance laminate includes a thermally conductive multi-layer and an auto-shading film on the thermally conductive multi-layer. The auto-shading film includes discrete substructures which vary in alignment in response to an electric field. A wire is embedded in the auto-shading film and a controller is electrically coupled to the wire. The controller switchably causes the wire to deliver the electric field to the discrete substructures. The variable transmittance laminate has a first transmittance when a switch is in a first state and a second transmittance when the switch in in a second state.

    SYSTEM FOR AUDIBLY DETECTING PRECURSORS OF MATERIAL FRACTURE FOR A SPECIMEN UNDER TEST
    8.
    发明申请
    SYSTEM FOR AUDIBLY DETECTING PRECURSORS OF MATERIAL FRACTURE FOR A SPECIMEN UNDER TEST 有权

    公开(公告)号：US20230014054A1

    公开(公告)日：2023-01-19

    申请号：US17374173

    申请日：2021-07-13

    Applicant: GM Global Technology Operations LLC

    Inventor： Bradley Allen Newcomb ,  Nathan Thompson

    IPC: G01N29/14 ,  G01N29/12 ,  G01N29/06

    Abstract: A system for determining a trigger amplitude indicating a precursor to a material fracture in a specimen under test includes a microphone converting acoustic emission emitted by the specimen under test into electrical signals. A load is exerted upon the specimen under test and the acoustic emission are emitted when the load causes the specimen under test to undergo deformation prior to the material fracture. A control module is in electrical communication with the microphone and executes instructions to monitor the electrical signals generated by the microphone and filter the electrical signals generated by the microphone. The control module converts the electrical signals generated by the microphone into individual frequency components based on a fast Fourier Transform (FFT). The individual frequency components each include a peak intensity. The control module determines the trigger amplitude based on the peak intensity of the individual frequency components of the FFT.

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