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公开(公告)号：US20210258471A1
公开(公告)日：2021-08-19
申请号：US17169660
申请日：2021-02-08
Inventor： Terry W. Stanard , Theus H. Aspiras , Vijayan K. Asari , Taleri L. Hammack
Abstract: A system includes a control station that enables efficient human collaboration with automated object tracking. The control station is communicatively coupled to an aerial vehicle to receive full motion video of a ground scene taken by an airborne sensor of the aerial vehicle. The control station spatially registers features of a movable object present in the ground scene and determines motion of the movable object relative to the ground scene. The control station predicts a trajectory of the movable objective relative to the ground scene. The control station tracks the movable object based on data fusion of: (i) the spatially registered features; (ii) the determined motion; and (iii) the predicted trajectory of the movable object. The control station presents a tracking annotation and a determined confidence indicator for the tracking annotation on a user interface device to facilitate human collaboration with object tracking.
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公开(公告)号：US20210125348A1
公开(公告)日：2021-04-29
申请号：US17077323
申请日：2020-10-22
Inventor： Santasri Bose-Pillai , Jack McRae , Christopher Rice , Steven Fiorino
Abstract: A system and method provide improved remote turbulence measurement. The system includes an image capturing device that captures frames of images of a target. A controller of the system tracks motion of one or more features of the images between frames using a pattern recognition algorithm. The controller computes subpixel motion based on results of the pattern recognition algorithm and computes differential motion or tilts between pairs of features. The controller computes differential tilt variances from every set of frames. The controller computes theoretical weighting functions for differential tilt variances. The controller determines weights to linearly combine weighting functions such that the combined weighting function closely resembles a desired weighting function that corresponds to the turbulence parameter of interest. The controller linearly combines the differential tilt variances using the determined weights to obtain the turbulence parameter of interest.
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公开(公告)号：US20210033750A1
公开(公告)日：2021-02-04
申请号：US16851906
申请日：2020-04-17
Inventor： Joshua Lentz , Kevin Brink
Abstract: A star tracker includes imaging optics comprising a folding mirror, a lens, and a detector. The folding mirror bends light received from an optical axis through the lens that focuses the bent light onto the detector. The star tracker includes a steering mechanism that steers light from an adjustable field of view (FOV) to the optical axis of the imaging optics. The steering mechanism includes: (i) a first photonic crystal element comprising beam pointing spatially variant photonic crystals (SVPCs); (ii) a second photonic crystal element comprising beam pointing SVPCs that is positioned adjacent and axially aligned with the first photonic crystal element; and (iii) a housing that receives the first and second photonic crystal elements for independent rotation.
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公开(公告)号：US20200340873A1
公开(公告)日：2020-10-29
申请号：US16815500
申请日：2020-03-11
Inventor： Charles M. Jenkins , Alain L. Beliveau
IPC: G01L5/14
Abstract: A Solid Instrumented Spherical Blast Impulse Recording Device (SISBIRD) includes a spherical housing formed of material that is resistant to an explosive blast wave from a test weapon. A test payload bore shaft is accessible through an opening in the spherical housing. A door is fastened over the opening in the spherical housing. A test data module is received in the test payload bore shaft. The test data module includes: (i) a three-axis acceleration sensor; (ii) a memory; and (iii) a controller. The controller is communicatively coupled to the three-axis acceleration sensor and the memory. The controller executes a data acquisition utility to record, in the memory, acceleration data in three-dimensions from the three-axis acceleration sensor during exposure of the spherical housing to the explosive blast wave.
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公开(公告)号：US20200292720A1
公开(公告)日：2020-09-17
申请号：US16812844
申请日：2020-03-09
Inventor： Robert Olesen , Bryan Egner , Darren Holland , Valerie Martin , James Bevins , Larry Burggraf , Buckley O'Day
Abstract: A directional radiation detection system and an omnidirectional radiation detector. The omnidirectional radiation detector detects radiation comprising at least one of: (i) gamma rays; and (ii) neutron particles. A radiation scatter mask (RSM) of the radiation detection system includes a rotating sleeve received over the omnidirectional radiation detector and rotating about a longitudinal axis. The RSM further includes: (i) a fin extending longitudinally from one side of the rotating sleeve; and (ii) a wall extending from the rotating sleeve and spaced apart from the fin having an upper end distally positioned on the rotating sleeve spaced apart or next to from a first lateral side of the fin and a lower end proximally positioned on the rotating sleeve and spaced apart from or next to a second lateral side of the fin.
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Patent Agency Ranking
36.发明授权公开(公告)号：US11747434B2
公开(公告)日：2023-09-05
申请号：US17211253
申请日：2021-03-24
Inventor： Ramachandran S. Raghavan
IPC: G01S7/02 , G01S13/524 , G01S7/41
CPC classification number: G01S7/023 , G01S7/414 , G01S13/5246
Abstract: Detection of a radar target from a received radar signal includes computing a vector of filter weights dependent upon a steering vector and determining a threshold value dependent upon a designated probability of false alarm. The vector of filter weights is applied to samples of the received radar signal at a test cell, corresponding to a test range, to provide a filtered test signal and a test power of the filtered test signal is computed. The weights are also applied to samples of the received radar signal at a number of reference cells, to produce filtered reference signals. A reference power is computed from the filtered reference signals and the radar target is detected at the test range when a ratio of the test power to the reference power exceeds the threshold value.
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公开(公告)号：US11543571B2
公开(公告)日：2023-01-03
申请号：US16902672
申请日：2020-06-16
Inventor： Justin W. Cleary , Evan M. Smith , Ricky D. Gibson, Jr. , Shivashankar R. Vangala , Joshua Hendrickson , Ivan Avrutsky
IPC: G02B5/28
Abstract: A transmission filter apparatus is provided that includes: (i) a substrate to serve as a foundation for the apparatus; (ii) a layer containing resonant dielectric cavities separated by conductive regions. The dimensions and design of the dielectric cavities, thickness of the layer, and substrate, dielectric and conductive materials are chosen to achieve resonant transmission of selected wavelengths. In a particular one or more embodiments, the layer is one dimensional, i.e. you have dielectric cavities along one axis in the plane that are comparatively infinity long in the parallel plane. In a particular one or more embodiments, the layer is two dimensional, i.e. you have dielectric cavities along both axis in the plane. The dimensions in each plane may or may not be equal. In a specific one or more embodiments, the dielectric cavities are terminated on the top and/or bottom by thin metal films with small apertures or tapers.
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公开(公告)号：US11378476B2
公开(公告)日：2022-07-05
申请号：US16815376
申请日：2020-03-11
Inventor： Charles M. Jenkins , Alain L. Beliveau
Abstract: An Instrumented Spherical Blast Impulse Recording Device (ISBIRD) provides for survivable test measurement of an explosive blast impulse. The ISBIRD includes a spherical housing formed of a metal having a thickness sufficient to survive the explosive blast wave from a test weapon. A test data module of the ISBIRD includes: (i) a three-axis acceleration sensor; (ii) a memory; and (iii) a controller communicatively coupled to the three-axis acceleration sensor and the memory. The controller executes a data acquisition utility to record acceleration data in three-dimensions from the three-axis acceleration sensor during exposure of the spherical housing to the explosive blast wave. An internal support structure of the ISBIRD is attached inside of the spherical housing and attached to the test data module. The internal support structure centrally locates the test data module within the spherical housing during exposure to the explosive blast wave.
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公开(公告)号：US11353627B2
公开(公告)日：2022-06-07
申请号：US16851906
申请日：2020-04-17
Inventor： Joshua Lentz , Kevin Brink
Abstract: A star tracker includes imaging optics comprising a folding mirror, a lens, and a detector. The folding mirror bends light received from an optical axis through the lens that focuses the bent light onto the detector. The star tracker includes a steering mechanism that steers light from an adjustable field of view (FOV) to the optical axis of the imaging optics. The steering mechanism includes: (i) a first photonic crystal element comprising beam pointing spatially variant photonic crystals (SVPCs); (ii) a second photonic crystal element comprising beam pointing SVPCs that is positioned adjacent and axially aligned with the first photonic crystal element; and (iii) a housing that receives the first and second photonic crystal elements for independent rotation.
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公开(公告)号：US20210372921A1
公开(公告)日：2021-12-02
申请号：US17335804
申请日：2021-06-01
Inventor： Jennie Burns , Joel Bixler
IPC: G01N21/45
Abstract: A digital speckle pattern interferometer (DSPI) is provided for long-range measurement of displacement of materials within a hazardous environments. A test arm of a portion of coherent beam from a laser is aimed at a selected angle to traverse a distance to a test surface. An input collimator has a lens wide enough to receive a reflected beam from the test surface and is focused at a corresponding distance. The reflected beam is combined with a reference beam split from the coherent radiation onto a camera for measuring displacement of the test surface based on an electronic speckle pattern interferometer (ESPI).
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