A method for determining a state of a road surface in which, a time-series waveform of tire vibration detected by an acceleration sensor is windowed by a windowing means with a time T and a feature vector Xi in each time window is calculated through the extraction of a time-series waveform of the tire-vibration in each time window. Thereafter, in the calculation of a kernel function KAfrom the feature vector Xi in each time window and a road surface feature vector YAjthat is a feature vector in each time window calculated from a time-series waveform of tire-vibration that has been calculated in advance for each road surface state, the feature vector Xiin each time window and the road-surface feature vector YAjare made to be vibration levels of frequency bands of 500 Hz or greater extracted from the time-series waveform in each time window.


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    Title :

    ROAD SURFACE STATE DETERMINATION METHOD AND ROAD SURFACE STATE DETERMINATION DEVICE


    Additional title:

    STRASSENOBERFLÄCHENVORHERSAGEVERFAHREN UND TRASSENOBERFLÄCHENVORHERSAGEVORRICHTUNG
    PROCÉDÉ DE DÉTERMINATION D'ÉTAT DE SURFACE DE ROUTE ET DISPOSITIF DE DÉTERMINATION D'ÉTAT DE SURFACE DE ROUTE


    Contributors:
    ISHII KEITA (author) / MASAGO TAKESHI (author) / GOTO TAKATO (author)

    Publication date :

    2021-03-10


    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 / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / G06K Erkennen von Daten , RECOGNITION OF DATA / G06N COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS , Rechnersysteme, basierend auf spezifischen Rechenmodellen



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