Optical reference for inertial drift mitigation

    公开(公告)号:US12130374B2

    公开(公告)日:2024-10-29

    申请号:US16910995

    申请日:2020-06-24

    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.

    DIRECTING ENERGY BY DISTRIBUTED ARRAY OF INDEPENDENT COHERENT MOBILE ELEMENTS

    公开(公告)号:US20240219563A1

    公开(公告)日:2024-07-04

    申请号:US18093276

    申请日:2023-01-04

    申请人: RAYTHEON COMPANY

    发明人: David D. Crouch

    IPC分类号: G01S17/08 G01S5/16 H04B10/61

    CPC分类号: G01S17/08 G01S5/16 H04B10/61

    摘要: Method and system for directing RF energy from an active retrodirective antenna array including moving elements onto a target includes: receiving a beacon from the target by each element, the scattered beacon including an RF pilot signal imposed thereon, extracting the RF pilot signal from the received scattered optical beacon, dynamically measuring a distance to an area of optical beacon illumination on the target, calculating a phase utilizing the measured distance to the area of the target and a frequency of the extracted RF pilot signal, phase conjugating the RF pilot signal based on the calculated phase, and transmitting the phase conjugated RF signal towards the target; by each element, where the phase conjugated RF signal transmitted by each element add coherently at the area of optical beacon illumination on the target to enhance power density on the target.

    SYSTEM AND METHOD FOR DETERMINING GEOLOCATION DATA

    公开(公告)号:US20240094004A1

    公开(公告)日:2024-03-21

    申请号:US17766883

    申请日:2020-12-15

    IPC分类号: G01C21/20 G01S5/16

    CPC分类号: G01C21/206 G01S5/16

    摘要: A system and sensor device for determining geolocation data. A plurality of nodes, each at a predetermined location is provided. Each node emits a time-varying magnetic field, each time-varying magnetic field having a characteristic identifying the node. A sensor device comprises a magnetometer, the magnetometer configured to detect the time-varying magnetic field from at least one of the plurality of nodes, the magnetometer comprising diamond comprising at least one quantum spin defect. The sensor device has a processor configured to determine the identifying characteristic from the sensed time-varying magnetic field, and is further configured to determine geolocation data on the basis of at least the determined identifying characteristic.

    POSITIONING A DEVICE
    10.
    发明公开

    公开(公告)号:US20230344119A1

    公开(公告)日:2023-10-26

    申请号:US18042710

    申请日:2020-08-27

    IPC分类号: H01Q3/08 H01Q1/12 G01S5/16

    CPC分类号: H01Q3/08 H01Q1/1257 G01S5/16

    摘要: Embodiments described herein relate to methods and apparatus for positioning a device to communicate with a transmitter. In one embodiment the method comprises receiving a communications signal (115, 390) from the transmitter (405), the communications signal comprising electromagnetic radiation having a wavelength corresponding to line-of-sight propagation only; determining a first spatial parameter of the device and a signal parameter of the communications signal using the received communications signal (410, 415, 420); determining second spatial parameters using the first spatial parameter and the signal parameter (425), the second spatial parameters for positioning the device to improve communication with the transmitter.