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.
ROAD SURFACE STATE DETERMINATION METHOD AND ROAD SURFACE STATE DETERMINATION DEVICE
STRASSENOBERFLÄCHENVORHERSAGEVERFAHREN UND TRASSENOBERFLÄCHENVORHERSAGEVORRICHTUNG
PROCÉDÉ DE DÉTERMINATION D'ÉTAT DE SURFACE DE ROUTE ET DISPOSITIF DE DÉTERMINATION D'ÉTAT DE SURFACE DE ROUTE
2021-03-10
Patent
Electronic Resource
English
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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