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 KA from the feature vector Xi in each time window and a road surface feature vector YAj that 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 Xi in each time window and the road-surface feature vector YAj are 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
2021-10-07
Patent
Electronic Resource
English
IPC: | 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 / G01V Geophysik , GEOPHYSICS / G01W METEOROLOGY , Meteorologie / G06N COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS , Rechnersysteme, basierend auf spezifischen Rechenmodellen |
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