VELOCITY MEASUREMENT BY COMPARISON OF INDEPENDENT LASERS

    公开(公告)号:US20250123400A1

    公开(公告)日:2025-04-17

    申请号:US18380426

    申请日:2023-10-16

    Abstract: A method includes emitting scanned reference laser light from a first tunable laser into a first atomic vapor filter to output filtered scanned reference laser light and receiving the filtered reference laser light with a first detector. The method includes emitting scanned outgoing signal laser light from a second tunable laser into an atmospheric space, receiving a return of the scanned signal laser light from Doppler shifted scattering from the atmospheric space into a second atomic vapor filter to output Doppler shifted filtered scanned signal laser light, and receiving the Doppler shifted filtered scanned signal laser laser light with a second detector. Each tunable laser wavelength scan is controlled independently using information from the wavelength scan received at the associated detector to maintain the center of the wavelength scan received at the detector as the bottom of an atomic absorption well. Velocity is determined using the Doppler shift of the light collected from atmospheric space as measured by the wavelength difference between the center wavelength of the scanned reference laser and the center wavelength of the scanned outgoing signal laser light which is transmitted into the atmosphere.

    Three-dimensional stress-sensitive device

    公开(公告)号:US12264063B2

    公开(公告)日:2025-04-01

    申请号:US17726935

    申请日:2022-04-22

    Abstract: A stress-sensitive device includes a substrate having a first surface with a cavity defined therein and a three-dimensional deformable material extending along the first surface and into the cavity. The three-dimensional deformable material has an electrical characteristic responsive to deformation. A method of forming a three-dimensional stress-sensitive device includes providing a substrate having a first surface and a second surface opposite the first surface, forming a cavity in the substrate, wherein the cavity is open to the first surface, depositing a sacrificial layer in the cavity, depositing a deformable material on the sacrificial layer, and removing at least a portion of the sacrificial layer to form an interstitial space between the deformable material and the substrate in the cavity.

    INTEGRATED STANDOFF OPTICAL ICE DETECTION AND HUMIDITY SENSING

    公开(公告)号:US20250067899A1

    公开(公告)日:2025-02-27

    申请号:US18236041

    申请日:2023-08-21

    Abstract: A system includes an optical ice detection (OID) sub-system optically coupled to light collection optics. A water vapor differential absorption LIDAR (WV-DIAL) sub-system is optically coupled to the OID laser source or light collection optics. The OID sub-system and the WV-DIAL sub-system share at least a portion of an optical path of the light source or through the light collection optics. The OID sub-system, the WV-DIAL sub-system, and the illumination and light collection optics can all be aboard an aircraft. A method includes using a set of illumination and light collection optics aboard an aircraft to obtain data indicative of optical ice detection (OID) and water vapor differential absorption LIDAR (WV-DIAL), e.g. to detect contrail forming conditions for the aircraft and/or predict persistence of contrails from the aircraft.

    Pitot tube heater assembly
    5.
    发明授权

    公开(公告)号:US12198839B2

    公开(公告)日:2025-01-14

    申请号:US17578653

    申请日:2022-01-19

    Abstract: A pitot tube includes an outer tube extending from a first tube end to second tube end. The second tube end defines a tip portion of the pitot tube. A tube sleeve is located inside of the outer tube and defines a tube passage extending from the first tube end to the second tube end. A heating element is located between the outer tube and the tube sleeve. The heating element is isolated from airflow into the tube passage. A method of forming a pitot tube includes installing a heating element to an outer surface of a tube sleeve, the tube sleeve defining a tube passage of the pitot tube. The tube sleeve is secured in an outer tube such that the heating element is between the tube sleeve and the outer tube and is isolated from airflow through the tube passage.

    Method and device for water intrusion mitigation

    公开(公告)号:US12137527B2

    公开(公告)日:2024-11-05

    申请号:US17230281

    申请日:2021-04-14

    Abstract: A water intrusion mitigation device for use in enclosures housing electric components and equipment that are sensitive to humidity includes a thermoelectric cooler and a water electrolyzer. The thermoelectric cooler has two sides: a first side that is configured to be heated with the application of an electric current and a second side that is configured to cooled with the application of an electric current. The water electrolyzer is a proton exchange membrane that is in thermal communication with the second side of the thermoelectric cooler.

    AOM FREQUENCY SHIFTER TEST FIXTURE
    9.
    发明公开

    公开(公告)号:US20240345128A1

    公开(公告)日:2024-10-17

    申请号:US18134228

    申请日:2023-04-13

    Inventor: Gary E. Halama

    CPC classification number: G01P21/025 G01P5/26 G01S7/497 G01S17/58

    Abstract: A doppler lidar system includes an acousto-optic modulator. The acousto-optic modulator frequency shifts light to simulate a Doppler effect of a target without moving the target relative to a transceiver. A detector detects a frequency. One or more processors then calibrate the doppler lidar system based on the detected frequency. The acousto-optic modulator is then decoupled to return the doppler lidar system to a normal operating condition. The acousto-optic modulator is coupled in a transmit path or a receive path of the doppler lidar system.

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