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12 条记录 (耗时 0.012 秒)

    Foreign object debris discrimination with modulated laser light
    2.
    发明授权
    Foreign object debris discrimination with modulated laser light 有权

    公开(公告)号：US12019028B2

    公开(公告)日：2024-06-25

    申请号：US17383781

    申请日：2021-07-23

    申请人： Raytheon Technologies Corporation

    发明人： Jose-Rodrigo Castillo-Garza ,  David L. Lincoln

    IPC分类号： G01N21/88 ,  G01N15/10 ,  G02B6/38

    CPC分类号： G01N21/8806 ,  G01N15/10 ,  G02B6/3885 ,  G01N2015/1027 ,  G01N2201/06113

    摘要： A method of foreign object debris discrimination includes illuminating a particle located within a sensing volume with a modulated electromagnetic radiation pulse emitted from a source; receiving one or more electromagnetic radiation return signals that have been scattered by the particle illuminated by the modulated electromagnetic radiation pulse at a detector; mixing, using a controller, the electromagnetic radiation return signal of amplitude IRS and frequency fRS with a reference signal of amplitude ILS and frequency fRS; analyzing, using the controller, an amplitude of the mixed signal √{square root over (ILSIRS)}, and frequency of the mixed signal, fRS−fLS; and classifying, using the controller, a particle position, a velocity, and electromagnetic characteristic of the particle based on the amplitude, √{square root over (ILSIRS)}, and frequency, fRS−fLS of the mixed signal.

    Particle counting apparatus, systems and methods
    5.
    发明授权
    Particle counting apparatus, systems and methods 有权

    公开(公告)号：US12050169B2

    公开(公告)日：2024-07-30

    申请号：US17430191

    申请日：2020-03-20

    申请人： Precision Planting LLC

    发明人： Chad E. Plattner ,  Philip Steiner

    IPC分类号： G01N15/14 ,  A01C7/10 ,  G01N15/00 ,  G01N15/10 ,  G01N15/1434

    CPC分类号： G01N15/1459 ,  A01C7/105 ,  G01N15/1434 ,  G01N2015/0046 ,  G01N2015/1027 ,  G01N2015/1486 ,  G01N2015/1493

    摘要： In one embodiment a first light plane is generated across the passageway by a first LED emitter array. A corresponding photodiode receiver array detects particles passing through a first number of light channels comprising the first light plane. In a second embodiment a second light plane is generated across the passageway at 90 degrees from the first light plane and longitudinally offset from the first light plane by a second LED emitter array. A corresponding photodiode receiver array detects particles passing through a second number of light channels comprising the second light plane. The second light plane is capable of identifying particles in a third dimension that may go undetected when passing through the first light plane. The raw output signals generated by respective photodiodes is normalized, analyzed and characterized to differentiate between particles passing through light planes as individual particles or groups of overlapping particles to be separately counted.

    FOREIGN OBJECT DEBRIS DISCRIMINATION WITH MODULATED LASER LIGHT
    8.
    发明公开
    FOREIGN OBJECT DEBRIS DISCRIMINATION WITH MODULATED LASER LIGHT 审中-公开

    公开(公告)号：US20240319106A1

    公开(公告)日：2024-09-26

    申请号：US18668764

    申请日：2024-05-20

    申请人： RTX Corporation

    发明人： Jose-Rodrigo Castillo-Garza ,  David L. Lincoln

    IPC分类号： G01N21/88 ,  G01N15/10 ,  G02B6/38

    CPC分类号： G01N21/8806 ,  G01N15/10 ,  G02B6/3885 ,  G01N2015/1027 ,  G01N2201/06113

    摘要： A method of foreign object debris discrimination includes illuminating a particle located within a sensing volume with a modulated electromagnetic radiation pulse emitted from a source; receiving one or more electromagnetic radiation return signals that have been scattered by the particle illuminated by the modulated electromagnetic radiation pulse at a detector; mixing, using a controller, the electromagnetic radiation return signal of amplitude IRS and frequency fRS with a reference signal of amplitude ILS and frequency fRS; analyzing, using the controller, an amplitude of the mixed signal √{square root over (ILSIRS)}, and frequency of the mixed signal, fRS−fLS; and classifying, using the controller, a particle position, a velocity, and electromagnetic characteristic of the particle based on the amplitude, √{square root over (ILSIRS)}, and frequency, fRS−fLS, of the mixed signal.