METHOD FOR DETECTING ABRASION OF TIRE AND DEVICE FOR DETECTING ABRASION OF TIRE

摘要

A method for detecting the abrasion state at a tire tread portion precisely, and a detection device excellent in durability. Acceleration of the inner surface of the tire tread is detected by installing an acceleration sensor (11) at an inner liner portion of a tire and an acceleration waveform of a stepping region where a block from a time series waveform of the acceleration thus obtained includes a peak occurring when stepping into the road surface, or an acceleration waveform of a kick-out region where the block includes a peak occurring when leaving the road surface is extracted. A frequency band value Pf which is the magnitude of acceleration in a predetermined frequency region of a frequency spectrum obtained by performing frequency analysis of the extracted acceleration waveform is estimated. The degree of abrasion of the tire is judged by comparing the frequency band value Pf with a preset threshold K(v).