MEMS STRAIN GAUGE PRESSURE SENSOR WITH MECHANICAL SYMMETRIES

    公开(公告)号:US20220307929A1

    公开(公告)日:2022-09-29

    申请号:US17216049

    申请日:2021-03-29

    Inventor: Jun Zheng

    Abstract: A microelectromechanical system (MEMS) strain gauge pressure sensor includes a top wafer stack having a top surface and a first cavity that is configured to receive a first fluid at a first pressure, a backing wafer having a bottom surface opposite the top surface of the top wafer stack; a diaphragm wafer positioned between the top wafer stack and the backing wafer and having a second cavity that is configured to receive a second fluid at a second pressure, and a pedestal connected laterally to the top wafer stack, the backing wafer, and the diaphragm wafer. The diaphragm wafer includes a diaphragm extending between the first cavity and the second cavity, and a resistor positioned on the diaphragm. The MEMS strain gauge pressure sensor has a central axis such that the MEMS strain gauge pressure sensor has mechanical symmetries about the central axis.

    COMPOSITE WIPER BLADE ASSEMBLY
    42.
    发明申请

    公开(公告)号:US20220289145A1

    公开(公告)日:2022-09-15

    申请号:US17408021

    申请日:2021-08-20

    Abstract: An aircraft windshield wiper system includes a wiper arm, a wiper blade coupled to a first end of the wiper arm, and an output shaft coupled to a second end of the wiper arm. The wiper blade includes a support member coupled to a blade element through a clip and a fastener extending through the blade element. The support member can be made from a composite material and the clip and fastener allow for attachment of the blade element to the support member without piercing the support member.

    WINDSHIELD WIPER SYSTEM WITH AN INTERNAL TRIGGER

    公开(公告)号:US20220234542A1

    公开(公告)日:2022-07-28

    申请号:US17484334

    申请日:2021-09-24

    Abstract: An aircraft windshield wiper system includes a wiper arm, a wiper blade coupled to a first end of the wiper arm, and an output shaft coupled to a second end of the wiper arm. The wiper blade is configured to clean water, dirt, and other debris from the windshield of the aircraft. The output shaft is configured to rotate and cause the wiper arm with the coupled wiper blade to sweep across and clean the windshield. A sensor and a trigger are coupled to an actuator to ensure accurate sweep angle and parking position of the wiper arm and wiper blade.

    PITOT TUBE HEATER ASSEMBLY
    44.
    发明申请

    公开(公告)号:US20220136884A1

    公开(公告)日:2022-05-05

    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.

    Differential leakage current measurement for heater health monitoring

    公开(公告)号:US11293995B2

    公开(公告)日:2022-04-05

    申请号:US16826916

    申请日:2020-03-23

    Abstract: A system and method for monitoring leakage current in a heater connected to a heater power supply by a power cable having a first power lead conducting an inlet current defining an inlet current direction and a second power lead conducting an outlet current defining an outlet current direction that is opposite the inlet current direction. The system includes a differential current electromagnetic sensor having a magnetic core with a center region that the power cable passes through one or more times. The magnetic core has an air gap in which a magnetic flux sensing device is positioned and configured to provide a signal that is representative of magnetic flux across the air gap, which is indicative of a difference between the inlet current and the outlet current. This difference defines the leakage current.

    Pitot tube heater assembly
    46.
    发明授权

    公开(公告)号:US11262227B2

    公开(公告)日:2022-03-01

    申请号:US16578561

    申请日:2019-09-23

    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.

    TARGETED AREA IMAGE ENHANCEMENT FOR AIRCRAFT CAMERA SYSTEM

    公开(公告)号:US20220020125A1

    公开(公告)日:2022-01-20

    申请号:US16931709

    申请日:2020-07-17

    Abstract: A method of enhancing a portion of an aircraft digital video image in real time includes the steps of identifying a target area within a field of view of a camera, the target area including at least a portion of an aircraft structure and a shadowed region, and selecting for enhancement a predetermined pixel subset corresponding to the target area. The method further includes capturing an image using the camera, the image represented by a signal, providing the signal to a video processing box, formatting the image within the video processing box, and applying, using a processing device, a contrast enhancement algorithm to the predetermined pixel subset to create and enhanced image.

    SMART COVER BUG DETERRENT
    49.
    发明申请

    公开(公告)号:US20220015352A1

    公开(公告)日:2022-01-20

    申请号:US17492316

    申请日:2021-10-01

    Abstract: A cover for a probe head of an air data probe includes a sleeve defining a cavity for enclosing a portion of the probe head of the air data probe, the sleeve including a closed end, an open end opposite the closed end, and an interior surface extending from the open end to the closed end, and a reservoir for holding insect repellent, the reservoir located at least partially within the cavity of the sleeve.

    PERSONAL PROTECTIVE POSITIVE PRESSURE DEVICE

    公开(公告)号:US20210386138A1

    公开(公告)日:2021-12-16

    申请号:US17301593

    申请日:2021-04-08

    Abstract: A personal protective positive pressure device includes a mask with an inlet connector and a tube with a first connector and a second connector. The tube is connected through the first connector to the inlet connector of the mask and the tube is connected through the second connector to an air nozzle of a ventilation system onboard a transportation vehicle. The personal protective positive pressure device is configured to limit inhalation of airborne pathogens while traveling on the transportation vehicle and to inspire confidence in the safe use of public transportation.

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