A method of determining a road surface condition includes: acquiring, when determining a condition of a road surface being in contact with a tire from a time-varying waveform of vibration of the running tire, the time-varying waveform of vibration having been detected by a vibration detecting means, a plurality of intrinsic vibration modes, from data of the time-varying waveform of vibration of the tire, using an algorithm of empirical mode decomposition; selecting an arbitrary intrinsic vibration mode from the plurality of intrinsic vibration modes; calculating a statistic amount from the distribution of feature data calculated by performing Hilbert transform on the selected intrinsic vibration mode to set the statistic amount as a feature amount; and determining the road surface condition from the feature amount and a feature amount obtained in advance for each road surface condition.


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    Title :

    ROAD SURFACE CONDITION DETERMINING METHOD AND ROAD SURFACE CONDITION DETERMINING DEVICE


    Additional title:

    VERFAHREN ZUR BEURTEILUNG DES STRASSENOBERFLÄCHENZUSTANDS UND VORRICHTUNG ZUR BEURTEILUNG DES STRASSENOBERFLÄCHENZUSTANDS
    PROCÉDÉ DE DÉTERMINATION DE L'ÉTAT D'UNE SURFACE DE ROUTE ET DISPOSITIF DE DÉTERMINATION DE L'ÉTAT D'UNE SURFACE DE ROUTE


    Contributors:
    ISHII KEITA (author)

    Publication date :

    2021-08-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01W METEOROLOGY , Meteorologie / B60C VEHICLE TYRES , Fahrzeugreifen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion




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