Altitude Contextualization for Calibrating a Barometric Pressure Sensor of a Mobile Device

    公开(公告)号:US20240310188A1

    公开(公告)日:2024-09-19

    申请号:US18599901

    申请日:2024-03-08

    申请人: NextNav, LLC

    IPC分类号: G01C25/00 G01C5/06

    CPC分类号: G01C25/00 G01C5/06

    摘要: Estimated positions of a computing device and whether the computing device is inside a building are determined. Atmospheric pressure measurements are collected when inside the buildings using a barometric pressure sensor of the computing device. Heights of the buildings are determined. Calibration values based on the heights of the buildings and the atmospheric pressure measurements are determined. A combined calibration value is determined based on the plurality of calibration values. The combined calibration value corresponds to a numerical overlap region of the plurality of calibration values.

    BUILDING HEIGHT DETERMINATION
    2.
    发明公开

    公开(公告)号:US20240142230A1

    公开(公告)日:2024-05-02

    申请号:US18498910

    申请日:2023-10-31

    申请人: Dense Air Limited

    IPC分类号: G01C5/06

    CPC分类号: G01C5/06

    摘要: A computer-implemented method for determining the height of a plurality of buildings in a region is described, the method comprising: retrieving a map of building locations in the region; retrieving a plurality of sensor data records from a plurality of mobile network devices, wherein each sensor data record comprises horizontal coordinate data and elevation data; processing the plurality of sensor data records and the map of building locations to generate a map set of building heights.

    Cockpit pressurization and oxygen warning system

    公开(公告)号:US11932413B2

    公开(公告)日:2024-03-19

    申请号:US17851768

    申请日:2022-06-28

    发明人: Jurgen R. Ihns

    摘要: A cockpit pressurization and oxygen warning system includes a cabin pressure input and an aircraft pressure input. A pilot interface includes a first visual indicator having a first recognizable characteristic disposed in a first position that is made visually perceptible when a first signal is asserted and a second visual indicator having a second recognizable characteristic esthetically different from the first recognizable characteristic and disposed in a second position different from the first position that is made visually perceptible when a second signal is asserted. A control circuit that is responsive to the cabin pressure input and the aircraft pressure input determines an acceptable range for the cabin altitude that corresponds to the aircraft altitude. The control circuit asserts the first signal when the cabin altitude is within the acceptable range and asserts the second signal when the cabin altitude is not within the acceptable range.

    Systems and methods for extending the spatial coverage of a reference pressure network

    公开(公告)号:US11913809B2

    公开(公告)日:2024-02-27

    申请号:US17938312

    申请日:2022-10-05

    申请人: NextNav, LLC

    IPC分类号: G01C5/06 G01C21/20

    CPC分类号: G01C5/06 G01C21/206

    摘要: Extending the spatial coverage of a reference pressure network. Particular embodiments described herein include machines that initially determine that an estimated position of a mobile device resides outside a coverage area of a network of reference pressure sensors. Reference-level pressures corresponding to reference pressure sensors of the network are determined using measurements of pressure from the network of reference pressure sensors. A pressure pattern for a region that includes the estimated position and an area not included in the coverage area of the network is determined using reference-level pressures that were not determined using measurements of pressure from the network of reference pressure sensors. The reference-level pressures corresponding to reference pressure sensors of the network and the pressure pattern are used to determine a reference-level pressure value for use in calibrating a pressure sensor of the mobile device or for use in estimating an altitude of the mobile device.

    IMPLANTABLE MEDICAL DEVICE
    7.
    发明公开

    公开(公告)号:US20230390044A1

    公开(公告)日:2023-12-07

    申请号:US18035536

    申请日:2021-12-09

    申请人: UROMEMS

    摘要: The invention relates to a medical device comprising: —a sealed casing (1), suited to being implanted in the body of a human or animal patient, —an inflatable element (3), —a fluidic circuit comprising a fluid reservoir (5) having a variable fluid volume and arranged inside the casing with a tube (2) between the reservoir and the inflatable element, —an actuator arranged inside the casing to selectively vary the volume of fluid in the reservoir, —a control unit (100) configured to control the actuator, —at least one sensor suited to measuring an absolute gauge pressure of the fluid in the fluidic circuit, a force exerted on the reservoir, a gas pressure inside the casing, an atmospheric pressure or a value relating to an altitude of the patient, the control unit (100) being configured so as: —on the basis of a measurement from said sensor while the actuator is inactive, to detect a differential between a value relating to an altitude of the patient and a reference value, and—as a function of said differential, to determine the command to be issued to the actuator so as to control the pressure of fluid in the fluidic circuit.