ROAD FACE STATE DISCRIMINATION METHOD AND ROAD FACE STATE DISCRIMINATION DEVICE

摘要

To provide a road face state discrimination method which can secure the discrimination accuracy of a road face state even if reducing a calculation amount of time elongation/contraction, and a road face state discrimination device.SOLUTION: A time series waveform of tire vibration detected by an acceleration sensor is curtained by a time T by curtaining means, a feature vector Xat each time window is calculated by extracting the time series waveform of the tire vibration at each time window, and after that, when calculating a Kernel function Kfrom the feature vector Xat each time window, and a reference feature vector Ybeing a feature vector at each time window which is acquired in advance at each road face state which is calculated in advance, both a digit number nnot larger than a decimal point of the feature vector Xat each time window, and a digit number nnot larger than a decimal point of the reference feature vector Yare changed to n which is smaller than n, and a Kernel function Kis calculated from the feature vector Xat each time window which is changed in the digit number, and a reference feature vector Y.SELECTED DRAWING: Figure 8