METHOD AND APPARATUS FOR DETECTING WEAR OF TIRE
First Claim
1. A method for detecting the wear of a tire, comprising the steps of:
- detecting an acceleration waveform of the inner surface of the tread; and
detecting the state of tire wear from an acceleration waveform in one or both of the leading edge region around a peak position appearing near the leading block point and the trailing edge region around a peak position appearing near the trailing block point of the detected acceleration waveform.
1 Assignment
0 Petitions
Accused Products
Abstract
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 Pf 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 Pf with a preset threshold K(v).
-
Citations
10 Claims
-
1. A method for detecting the wear of a tire, comprising the steps of:
-
detecting an acceleration waveform of the inner surface of the tread; and detecting the state of tire wear from an acceleration waveform in one or both of the leading edge region around a peak position appearing near the leading block point and the trailing edge region around a peak position appearing near the trailing block point of the detected acceleration waveform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An apparatus for detecting the wear of a tire, comprising:
-
an acceleration sensor for detecting the acceleration of the inner surface of the tread; an acceleration waveform extracting means for extracting an acceleration waveform in the leading edge region around a peak position appearing near the leading block point and an acceleration waveform in the trailing edge region around a peak position appearing near the trailing block point from the time series waveform of the detected acceleration; a band value calculating means for calculating a frequency band value, which is the magnitude of acceleration in a predetermined frequency band of acceleration waveform, in one or both of the acceleration waveforms in the leading edge region and the trailing edge region extracted by the acceleration waveform extracting means; and a wear determining means for determining whether tire wear has progressed based on the calculated band value.
-
Specification