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

摘要

A method and apparatus for detecting the state of wear of the tire tread with accuracy and durability are provided. Acceleration of the inner surface of the tire tread is detected by an acceleration sensor installed in an inner liner region of the tire. From a thus detected time-series waveform of acceleration, an acceleration waveform in the leading edge region including a leading peak which occurs when the block engages with the road surface or an acceleration waveform in the trailing edge region including a trailing peak which occurs when the block disengages from the road surface is extracted. A frequency band value P f is calculated which is the magnitude of acceleration in a predetermined frequency region of a frequency spectrum obtained through a frequency analysis of the extracted acceleration waveform. And the degree of tire wear is determined by comparing the frequency band value P f with a preset threshold K(v).