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    ACOUSTIC DIFFRACTIVE CONCENTRATORS
    1.
    发明专利
    ACOUSTIC DIFFRACTIVE CONCENTRATORS 未知

    公开(公告)号：CA3134454A1

    公开(公告)日：2020-09-24

    申请号：CA3134454

    申请日：2020-03-20

    Applicant: ELWHA LLC

    Inventor： URZHUMOV YAROSLAV A

    IPC: H01Q3/44 ,  H01Q21/06 ,  H01Q21/29

    Abstract: An acoustically-transmissive structure with a three-dimensional distribution of subwavelength acoustic refractive indices to diffractively concentrate acoustic waves incident on an effective aperture of the structure from a range of incidence directions between a minimum acceptance angle and a maximum acceptance angle to a smaller effective aperture. In a specific embodiment, an acoustic system may include a plurality of electroacoustic transducers and an acoustic structure having a first, larger effective aperture with a three-dimensional distribution of acoustic refractive indices. The acoustic structure diffractively concentrates acoustic waves received at a first set of angles of incidence to a first electroacoustic transducer and diffractively concentrates acoustic waves received at a second set of angles of incidence to a second electroacoustic transducer. The effective apertures of each of the first and second electroacoustic transducers has a smaller effective aperture relative to the larger effective aperture of the acoustic structure.

    RESONANCE-FREQUENCY DIVERSE METAMATERIALS AND METASURFACES
    2.
    发明专利
    RESONANCE-FREQUENCY DIVERSE METAMATERIALS AND METASURFACES 未知

    公开(公告)号：CA3132836A1

    公开(公告)日：2020-09-24

    申请号：CA3132836

    申请日：2020-03-20

    Applicant: ELWHA LLC

    Inventor： URZHUMOV YAROSLAV A

    IPC: H01Q3/26 ,  H01Q1/38 ,  H01Q15/00

    Abstract: A beamforming system, comprising a plurality of subsets of tunable resonator elements arranged on a substrate. Each subset of tunable resonator elements comprises at least two resonator elements that have a common resonance property modifiable by a common physical stimulus. A first control input may provide a first physical stimulus to modify the resonance property of all the tunable resonator elements in a first subset of tunable resonator elements. A second control input may provide a second physical stimulus to modify the resonance property of all the tunable resonator elements in a second subset of tunable resonator elements. A controller adjusts the first and second physical stimulus provided via the control inputs between a plurality of physical stimulus values. Each different physical stimulus value corresponds to one of a plurality of a unique resonance patterns and associated unique radiation patterns.

    WHEEL SLIP OR SPIN NOTIFICATION
    4.
    发明申请
    WHEEL SLIP OR SPIN NOTIFICATION 审中-公开
    轮子滑动或旋转通知

    公开(公告)号：WO2015073407A3

    公开(公告)日：2015-08-20

    申请号：PCT/US2014064955

    申请日：2014-11-11

    Applicant: ELWHA LLC

    Inventor： DRISCOLL TOM ,  GUERCI JOSEPH R ,  HANNIGAN RUSSELL J ,  HYDE RODERICK A ,  ISHIKAWA MURIEL Y ,  KARE JORDIN T ,  MYHRVOLD NATHAN P ,  SMITH DAVID R ,  TEGREENE CLARENCE T ,  URZHUMOV YAROSLAV A ,  WHITMER CHARLES ,  WOOD LOWELL L JR ,  WOOD VICTORIA Y H

    IPC: B60B15/00 ,  G06T7/20

    CPC classification number: G06K9/00791 ,  B60W2550/00

    Abstract: Described embodiments include a system and method. A digital imaging device is configured to capture images of a region of a contact between a wheel of a terrestrial vehicle and a surface ("contact region"). A correlator is configured to correlate a first digital image of the contact region captured at a first time with a second digital image of the contact region captured at a second time. A kinematics circuit determines an incremental slide or slip of the wheel relative to the surface. A traction status circuit combines at least two instances of the incremental slide or slip into data indicative of a slide or slip by the terrestrial vehicle relative to the surface. A communications circuit outputs an electronic signal indicative of the data indicative of a slide or slip by the terrestrial vehicle.

    Abstract translation: 所描述的实施例包括系统和方法。 数字成像装置被配置成捕获地面车辆的车轮与表面（“接触区域”）之间的接触区域的图像。 相关器被配置成将在第一时间捕获的接触区域的第一数字图像与在第二时间捕获的接触区域的第二数字图像相关。 运动学电路确定车轮相对于表面的增量滑动或滑动。 牵引状态电路将增量滑动或滑动的至少两个实例组合成指示地面车辆相对于表面的滑动或滑动的数据。 通信电路输出电子信号，该电子信号指示由地面车辆指示滑动或滑动的数据。

    ARTIFICIALLY STRUCTURED UNIT CELLS PROVIDING LOCALIZED B1 MAGNETIC FIELDS FOR MRI AND NMR DEVICES
    8.
    发明公开
    ARTIFICIALLY STRUCTURED UNIT CELLS PROVIDING LOCALIZED B1 MAGNETIC FIELDS FOR MRI AND NMR DEVICES 审中-公开

    公开(公告)号：EP3169230A4

    公开(公告)日：2018-04-04

    申请号：EP15821987

    申请日：2015-07-16

    Applicant: ELWHA LLC

    Inventor： SMITH DAVID R ,  DRISCOLL TOM ,  URZHUMOV YAROSLAV A

    IPC: G01R33/34

    CPC classification number: G01R33/34046 ,  G01R33/288 ,  G01R33/345

    Abstract: Described embodiments include a system, apparatus, and method. An apparatus includes an array of at least two groups of at least two artificially structured electromagnetic unit cells. Each group of the at least two groups configured to be respectively linearly arranged with respect to the z-axis of the bore of MRI or NMR device. Each group of the at least two groups of artificially structured electromagnetic unit cells configured to transform an incident pulse of radiofrequency electromagnetic waves into a pulse of radiofrequency magnetic field B1 orientated transverse to a segment of the z-axis and spatially proximate to the group. The apparatus includes a radiofrequency electromagnetic wave conducting structure configured to selectably distribute a received pulse of radiofrequency electromagnetic waves to a group of the at least two groups.

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