To clear the line-of-sight (LOS) on a window in a lidar system within a vehicle, ultrasonic transducers are physically attached to the interior surface of the window to remove debris. When debris is detected at the window, the ultrasonic transducers are directed to vibrate at an ultrasonic frequency thereby generating an ultrasonic wave which causes the debris to bounce off the window. In some scenarios, the ultrasonic transducers vibrate with a particular phase shift to generate a travelling wave that causes the debris to sweep across the window. Additionally, windshield wipers, spray from a nozzle, and/or a hydrophobic or oleophobic coating may be used in combination with the ultrasonic transducers to remove the debris from the window.


    Access

    Download


    Export, share and cite



    Title :

    ULTRASONIC VIBRATIONS ON A WINDOW IN A LIDAR SYSTEM


    Contributors:

    Publication date :

    2021-08-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01S RADIO DIRECTION-FINDING , Funkpeilung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



    ULTRASONIC VIBRATIONS ON A WINDOW IN A LIDAR SYSTEM

    MCWHIRTER JOHN E | European Patent Office | 2018

    Free access

    Ultrasonic vibrations on a window in a lidar system

    MCWHIRTER JOHN E | European Patent Office | 2023

    Free access

    LiDAR SAFE WHEELCHAIR ELEVATOR BOARDING SYSTEM UTILIZING LiDAR AND ULTRASONIC SENSORS

    LEE EUNG HYUK / KIM DAE WE / LEE WON YOUNG et al. | European Patent Office | 2025

    Free access

    Friction-induced vibrations of window sealing systems

    Kim,U. / Krousgrill,C. / Mongeau,L. et al. | Automotive engineering | 2005


    Friction-lnduced Vibrations of Window Sealing Systems

    Kim, U. / Krousgrill, C. / Mongeau, L. et al. | British Library Conference Proceedings | 2005