知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

560 records (took 0.036 seconds)

    Measuring vehicle speeds with an uncalibrated camera
    4.
    发明授权
    Measuring vehicle speeds with an uncalibrated camera 有权

    公开(公告)号：US11803976B2

    公开(公告)日：2023-10-31

    申请号：US17484697

    申请日：2021-09-24

    Applicant: Reflex Traffic Systems Pty Ltd.

    Inventor： Jonathan Devor ,  Moshe Mikhail Frolov ,  Igal Muchnik ,  Herbert Zlotogorski

    IPC: G06K9/00 ,  G06T7/246 ,  G06T7/536 ,  G01P21/02 ,  G01P3/38

    CPC classification number: G06T7/251 ,  G01P3/38 ,  G01P21/02 ,  G06T7/536

    Abstract: Measuring speed of a vehicle in a road environment. During calibration, multiple images are captured of a calibration vehicle traveling at a known ground speed. A calibration image feature is located in the image of the calibration vehicle. An optical flow of the calibration image feature is computed to determine a model between an image speed of the calibration image feature and the known ground speed of the calibration vehicle. During speed measurement, multiple images are captured of a target vehicle traveling along a road surface at unknown ground speed. A target image feature may be located in an image of the target vehicle. An image speed may be computed of the target image feature. The model may be applied to determine the ground speed of the target vehicle from the image speed of the target image feature.

    Method, system, and sensor device for monitoring foam in vessel
    6.
    发明申请
    Method, system, and sensor device for monitoring foam in vessel 有权

    公开(公告)号：US20220260604A1

    公开(公告)日：2022-08-18

    申请号：US17651280

    申请日：2022-02-16

    Applicant: Nirrin Technologies, Inc.

    Inventor： Bryan A. Hassell

    IPC: G01N35/10 ,  G01P15/03 ,  G06N20/00 ,  G01P21/02

    Abstract: A foam sensor device is used for monitoring foam within a vessel. The sensor (e.g. accelerometer) is encapsulated inside a water-tight, sterilizable, shell, which floats on a liquid contained. In one example, the foam sensor device includes an accelerometer for detecting and measuring rotation and movement of the foam sensor device and generates movement data based on the detected movement. During a learning or calibration process, sensor data (e.g., movement data) from the foam sensor device is analyzed and classified using machine learning and/or signal processing methods to extract features indicative of different possible foam statuses, including varying levels of foam, or no foam and generate models for the different statuses. During normal operation, the foam sensor device transmits sensor data to an analyzer containing the pre-calibrated models, which determines whether there is foam or not. Based on the foam status, a pump controller adds anti-foam solution.

    Method and apparatus for monitoring fluid dynamic drag
    7.
    发明授权
    Method and apparatus for monitoring fluid dynamic drag 有权

    公开(公告)号：US11408906B2

    公开(公告)日：2022-08-09

    申请号：US16934446

    申请日：2020-07-21

    Applicant: 1323079 Alberta Ltd.

    Inventor： Chris Morton ,  Kelly Zwarych

    IPC: G01P5/16 ,  G01M9/06 ,  G01P5/165 ,  G01P21/02

    Abstract: Methods and apparatus for monitoring fluid-dynamic drag on an object, such as a bicycle, ground vehicle, watercraft, aircraft, or portion of a wind turbine are provided. An array of sensors obtain sensor readings for example indicating: power input for propelling the object; air speed and direction relative to motion of the object; and ground speed of the object. Sensor readings may also indicate: temperature; elevation and humidity for providing a measurement of air density. Sensor readings may also indicate inclination angle and forward acceleration. Processing circuitry determines a coefficient of drag area based on the sensor readings and optionally one or more stored parameters, according to a predetermined relationship. A pitot tube based apparatus for measuring fluid speed and direction is also provided. Methods for dynamic in situ calibration of the pitot tube apparatus, and of adjusting correction factors applied to correct measurement errors of this apparatus are also provided.

    Yaw auto-calibration for a wind turbine generator
    8.
    发明授权
    Yaw auto-calibration for a wind turbine generator 有权

    公开(公告)号：US11286910B2

    公开(公告)日：2022-03-29

    申请号：US16573629

    申请日：2019-09-17

    Applicant: American Superconductor Corporation

    Inventor： Gottfried Slanitsch ,  Robert Tratnig

    IPC: F03D17/00 ,  F03D7/04 ,  G05B19/042 ,  G01P5/02 ,  F03D7/02 ,  G01P21/02

    Abstract: A yaw auto-calibration method configured to calibrate at least one anemometer of a yaw control system to correct for yaw misalignment. The yaw auto-calibration method includes collecting wind turbine data over a plurality of time periods with respect to the at least one anemometer. The wind turbine data including one or more of mechanical speed, wind speed, turbine power, and wind direction. The method includes determining from the collected data a wind direction compensation signal associated with a plurality of operational parameter ranges and the wind direction compensation signals correspond to the effects on the at least one anemometer due to yaw misalignment. The method further includes providing the wind compensation signals to the yaw control system to adjust the wind direction data of the at least one anemometer for each of the associated operational parameter ranges.

Patent Agency Ranking