公开(公告)号：US11820470B2

公开(公告)日：2023-11-21

申请号：US17008967

申请日：2020-09-01

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Jerry Provenza

IPC: B63B43/14 ,  B60R21/00 ,  B60R21/01

CPC classification number: B63B43/14 ,  B60R2021/0016 ,  B60R2021/01252 ,  B63B2043/145

Abstract: An emergency vehicle flotation system has bladder(s) attached in a compressed state on a vehicle. An inflation initiating component comprising a selected one or more of a submersion sensor attached to the vehicle to detect water pressure indicative of submersion of the vehicle and a user interface device. Selectable force gas generator(s) (SFGGs) have one gas-generating propellant cells that are individually fired. The SFGG(s) have conduit(s) that receive gas from fired gas-generating propellant cells and direct the gas to inflate the bladder(s). A controller is communicatively coupled to the inflation initiating component and the gas-generating propellant cells of the one or more SFGGs. The controller enables the emergency vehicle flotation system to receive an inflation signal from the inflation initiating component, and to fire a selected number of the more than one gas-generating propellant cells to at least partially inflate the bladder(s).

公开(公告)号：US11635315B2

公开(公告)日：2023-04-25

申请号：US17245645

申请日：2021-04-30

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Jeremiah C Williams ,  Hengky Chandrahalim

IPC: G01F1/10 ,  G01L11/02 ,  G01F1/115

Abstract: A passive microscopic flow sensor includes a three-dimensional microscopic optical structure formed on a cleaved tip of an optical fiber. The three-dimensional microscopic optical structure includes a post attached off-center to and extending longitudinally from the cleaved tip of the optical fiber. A rotor of the three-dimensional microscopic optical structure is received for rotation on the post. The rotor has more than one blade. Each blade has a reflective undersurface that reflects a light signal back through the optical fiber when center aligned with the optical fiber, the blades of the rotor shaped to rotate at a rate related to a flow rate.

公开(公告)号：US20220269472A1

公开(公告)日：2022-08-25

申请号：US17169910

申请日：2021-02-08

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Avi Nusimow

IPC: G06F3/16 ,  H04R1/08 ,  F41A33/04

Abstract: An acoustic gunshot replicator device includes a microphone attachable proximate to a barrel of a firearm to sense a sound caused by a gunshot by the firearm. The device includes an audio output device configured to replicate the sound. The device includes a recording device that is communicatively coupled to the microphone and the audio output device and that is configured to record the sound sensed by the microphone and playback the recorded sound using the audio output device. A record control attachable to the firearm is communicatively coupled to the recording device to prompt recording of the sound in response to a first user input. A playback control attachable to the firearm is communicatively coupled to the recording device to prompt playback of the sound in response to a second user input.

公开(公告)号：US11356599B2

公开(公告)日：2022-06-07

申请号：US17169660

申请日：2021-02-08

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Terry W. Stanard ,  Theus H. Aspiras ,  Vijayan K. Asari ,  Taleri L. Hammack

IPC: H04N5/232 ,  G06T7/246 ,  H04N5/28

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.

公开(公告)号：US20220082481A1

公开(公告)日：2022-03-17

申请号：US17034006

申请日：2020-09-28

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： James M. Greer, JR.

IPC: G01N3/04 ,  G01N3/10

Abstract: A material testing system that uses at least one hydraulic grip is improved with cable clips that are attachable to a respective lateral side of each hydraulic grip wedge. Each cable clip has another end that extends to engage a cable(s) extending from a corresponding wedge retention spring hole. The cable(s) enable manual extension of a wedge retention spring for engagement and disengagement from the hydraulic grip wedge. The cable clip maintains the cable in a noninterfering position during operational use of the material testing system.

公开(公告)号：US20210376463A1

公开(公告)日：2021-12-02

申请号：US17332438

申请日：2021-05-27

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Jeffrey P. Massman

IPC: H01Q3/34 ,  H01Q1/48

Abstract: A phased array antenna system having radiating units unitarily formed and arranged in an array by direct metal sintering avoiding assembly requirements. Each radiating unit includes a free-space impedance transformer having first, second and third radiator elements. Each radiating unit includes an embedded balun having first, second, and third impedance transition elements located generally concentric with the first, the second, and the third radiator elements and distally connected respectively to form a first integrated coaxial interface, a second integrated coaxial interface, and an integrated ground interface. Each radiating unit includes a ground plane electrically coupled to the integrated ground interface.

公开(公告)号：US20210294039A1

公开(公告)日：2021-09-23

申请号：US17236028

申请日：2021-04-21

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Jeremiah Q. Williams ,  Hengky Chandrahalim

IPC: G02B6/293

Abstract: A method is provided for fabricating a passive optical sensor on a tip of an optical fiber. The method includes perpendicularly cleaving a tip of an optical fiber and mounting the tip of the optical fiber in a specimen holder of a photosensitive polymer three-dimensional micromachining machine. The method includes forming a three-dimensional microscopic optical structure within the photosensitive polymer that comprises a two cavity Fabry-Perot Interferometer (FPI) having a hinged optical layer that is pivotally coupled to a suspended structure. The method includes removing an uncured portion of the photosensitive polymer using a solvent. The method includes depositing a reflective layer on a mirror surface of the hinged optical layer. The method includes positioning the pivotally hinged optical layer to a closed position with the suspended structure, aligning the mirror surface with the cleaved tip of the optical fiber.

公开(公告)号：US20210149116A1

公开(公告)日：2021-05-20

申请号：US17136564

申请日：2020-12-29

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Hengky Chandrahalim ,  Jonathan Smith

IPC: G02B6/293

Abstract: A method of making passive microscopic Fabry-Pérot Interferometer (FPI) sensor includes forming a three-dimensional microscopic optical structure on a cleaved tip of an optical fiber that reflects a light signal back through the optical fiber. The reflected light is altered by refractive index changes in the three-dimensional structure that is subject to at least one of: (i) thermal radiation; and (ii) volatile organic compounds.

公开(公告)号：US11320596B2

公开(公告)日：2022-05-03

申请号：US17237128

申请日：2021-04-22

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Jeremiah Williams ,  Hengky Chandrahalim

IPC: G02B6/293 ,  G02B6/35 ,  G02B6/02 ,  G02B6/12

Abstract: A passive microscopic Fabry-Pérot Interferometer (FPI) sensor includes a three-dimensional microscopic optical structure formed on a cleaved tip of the optical fighter using a two-photon polymerization process on a photosensitive polymer by a three-dimensional micromachining device. The three-dimensional microscopic optical structure having a hinged optical layer pivotally connected to a distal portion of a suspended structure. A reflective layer is deposited on a mirror surface of the hinged optical layer while in an open position. The hinged optical layer is subsequently positioned in the closed position to align the mirror surface to at least partially reflect a light signal back through the optical fiber.

公开(公告)号：US20220091249A1

公开(公告)日：2022-03-24

申请号：US17479641

申请日：2021-09-20

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Ramachandran S. Raghavan

IPC: G01S13/524 ,  G01S7/02 ,  G01S7/292

Abstract: A radar system provides a transmitter that transmits a sequence of transmitted pulses in a transmit beam, receiving antenna array comprised of more than one element, and a receiver communicatively coupled to the receiving antenna area to receive received signal that comprises in-phase and quadrature samples collected of a reflected version of the sequence of transmitted pulses. A signal processing and target detection module resolves a received signal-plus-interference into different range cells based on a time delay between the transmitted pulse and the received signal, wherein a response from a range cell to a transmitted pulse is due to a target within the transmit beam and moving at an unknown velocity. An interference suppression module suppresses interference and test for presence of a target tested at each of a set of hypothesized azimuth angles and Doppler frequencies.