Examples of systems and methods for locating movable objects such as carts (e.g., shopping carts) are disclosed. Such systems and methods can use dead reckoning techniques to estimate the current position of the movable object. Various techniques for improving accuracy of position estimates are disclosed, including compensation for various error sources involving the use of magnetometer and accelerometer, and using vibration analysis to derive wheel rotation rates. Various techniques utilize characteristics of the operating environment in conjunction with or in lieu of dead reckoning techniques, including characteristic of environment such as ground texture, availability of signals from radio frequency (RF) transmitters including precision fix sources. Navigation techniques can include navigation history and backtracking, motion direction detection for dual swivel casters, use of gyroscopes, determining cart weight, multi-level navigation, multi-level magnetic measurements, use of lighting signatures, use of multiple navigation systems, or hard/soft iron compensation for different cart configurations.


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    Titel :

    NAVIGATION SYSTEMS FOR WHEELED CARTS


    Weitere Titelangaben:

    NAVIGATIONSSYSTEME FÜR WAGEN MIT RÄDERN
    SYSTÈMES DE NAVIGATION POUR CHARIOTS À ROUES


    Beteiligte:
    CARTER SCOTT J (Autor:in) / HANNAH STEPHEN E (Autor:in) / JAMES JESSE M (Autor:in) / RAMANATHAN NARAYANAN V (Autor:in) / HARLING ROBERT M (Autor:in) / JOHNSON JACK (Autor:in)

    Erscheinungsdatum :

    2021-01-20


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    G08B SIGNALLING OR CALLING SYSTEMS , Signalisier- oder Rufsysteme / B62K Fahrräder , CYCLES / G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES , Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen



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