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136769 条记录 (耗时 0.071 秒)

    Optical reference for inertial drift mitigation
    23.
    发明授权
    Optical reference for inertial drift mitigation 有权

    公开(公告)号：US12130374B2

    公开(公告)日：2024-10-29

    申请号：US16910995

    申请日：2020-06-24

    申请人： Rockwell Collins, Inc.

    发明人： Carlo L. Tiana

    IPC分类号： G01S5/16

    CPC分类号： G01S5/16

    摘要： An inertial head-tracking system includes light emitting diodes (LEDs) and photoreceptors. The LEDs and photoreceptors are positioned around the environment and helmet respectively. A processor periodically receives measurements from the photoreceptors and resets inertial drift based on those measurements. Either the LEDs or the photoreceptors are constrained to a specified range to allow for more accurate drift estimation.

    Satellite signal propagation delay test device
    24.
    发明授权
    Satellite signal propagation delay test device 有权

    公开(公告)号：US12130368B2

    公开(公告)日：2024-10-29

    申请号：US17884412

    申请日：2022-08-09

    申请人： VIAVI SOLUTIONS INC.

    发明人： Joseph Gomez ,  David Royle

    IPC分类号： G01S19/23

    CPC分类号： G01S19/23

    摘要： A test device determines a Global Navigation Satellite System (GNSS) signal propagation delay in a GNSS signal distribution system (GSDS) for a radio access network. The test device includes a GNSS receiver and a clock. The GNSS receiver is connected at different times to a reference GSDS with a known signal propagation delay and to a device under test (DUT), including a second GSDS having an unknown signal propagation delay. One pulse per second (1PPS) signals are generated by the GNSS receiver and are compared to determine the unknown signal propagation delay of the DUT.

    Ultrasound transmitter device for driving piezoelectric transducers
    25.
    发明授权
    Ultrasound transmitter device for driving piezoelectric transducers 有权

    公开(公告)号：US12130360B2

    公开(公告)日：2024-10-29

    申请号：US18178110

    申请日：2023-03-03

    申请人： STMicroelectronics S.r.l.

    发明人： Antonio Davide Leone ,  Vanni Poletto

    IPC分类号： G01S7/521 ,  G01S7/524 ,  G01S15/93 ,  G01S15/931 ,  G01S7/52 ,  H04R17/00

    CPC分类号： G01S15/931 ,  G01S7/521 ,  G01S7/524 ,  G01S2007/52007 ,  G01S2015/937 ,  H04R17/00

    摘要： In accordance with an embodiment, an ultrasound transmitter device includes a transformer comprising a secondary winding configured to be coupled to a piezoelectric transducer; a plurality of transistors coupled to the primary winding of the transformer and to a ground terminal via a sense resistor; an amplifier having an output coupled to control nodes of the plurality of transistors, a first input coupled to the sense resistor, and second input coupled to a reference resistor; a switching circuit configured to alternately couple control nodes of the plurality of transistors to an output of amplifier and to a reference node via complementary pulse signals, wherein the switching circuit is configured to turn on and turn off the plurality of transistors and operate the plurality of transistors in a push-pull manner; and a digital-to-analog converter having an output coupled to the reference resistor.

    Systems and methods to detect motion on sloped surfaces
    27.
    发明授权
    Systems and methods to detect motion on sloped surfaces 有权

    公开(公告)号：US12130352B2

    公开(公告)日：2024-10-29

    申请号：US18360158

    申请日：2023-07-27

    申请人： Niiva OpCo, LLC

    发明人： David Long ,  Jordan Hill

    IPC分类号： G01S13/534 ,  G01S13/42 ,  G01S13/87 ,  G08B21/10 ,  H04B7/06

    CPC分类号： G01S13/534 ,  G01S13/42 ,  G01S13/87 ,  G08B21/10 ,  H04B7/0617

    摘要： Systems and methods are described to identify motion events on a sloped surface, such as a mountainside, using transmitted and received radio frequency (RF) chirps. A one-dimensional array of receive antennas can be digitally beamformed to determine azimuth information of received reflected chirps. Elevation information can be determined based on time-of-flight measurements of received reflected chirps and known distances to locations on the sloped surface. Motion events may be characterized by deviations in return power levels and/or return phase shifts. The systems and methods may, for example, be used to provide real-time detection of avalanches and/or landslides.