| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for accurately estimating a tire partial wear of a shoulder part and a device thereof with less sensors.SOLUTION: A tire partial wear estimation device 10 is constituted of an acceleration sensor 11 arranged on an inner surface of a tire tread to measure a tire diameter direction acceleration; an acceleration waveform extraction means 12 for extracting an acceleration waveform of a kicking-out rear region from an output signal of the acceleration sensor; means for calculating a vibration level α of a partial wear major zone and a vibration level &bgr; of a reference zone from the extracted acceleration waveform; partial wear determination index calculation means 16 for calculating a partial wear determination index γ which is an index for determining the partial wear from the vibration level α and the vibration level &bgr;; and determination means 18 for determining whether or not an end part of the tire shoulder part is partially worn from the magnitude of the partial wear determination index γ. |
