Method of detecting wear of a tyre

摘要

A method for detecting a wear condition of a tire utilizes tread pattern elements included on the tire. The elements are adapted to generate first and second acoustic footprint noises (BEA1, BEA2), with one of the first and second acoustic footprint noises being characteristic of the wear condition of the tire. According to the method, a parent frequency spectrum, which is capable of forming a frequency spectrum of one of the first and second acoustic footprint noises, and a child frequency spectrum, which is capable of forming a frequency spectrum of the other of the first and second acoustic footprint noises, are selected from a frequency spectrum of an acoustic signal acquired from the tire. Two detection confidence indices are determined. If each detection confidence index meets a predetermined condition, a warning is emitted indicating that tire wear has been detected.

主权项

1. A method for detecting a wear condition of a tyre that includes a first tread pattern element adapted to generate a first acoustic footprint noise and a second tread pattern element adapted to generate a second acoustic footprint noise, the first and second acoustic footprint noises being characteristic of the wear condition of the tyre, the method comprising steps of:
acquiring an acoustic signal that is capable of including the first and second acoustic footprint noises; selecting a parent frequency spectrum, which is capable of forming a frequency spectrum of one of the first and second acoustic footprint noises, from within a frequency spectrum of the acquired acoustic signal; determining a trimmed frequency spectrum by eliminating at least part of the parent frequency spectrum from the frequency spectrum of the acquired acoustic signal; selecting a child frequency spectrum, which is capable of forming a frequency spectrum of another of the first and second acoustic footprint noises, from within the trimmed frequency spectrum; determining two detection confidence indices, which are indices associated with detection of the first and second acoustic footprint noises, based on at least one characteristic of each of the parent frequency spectrum and the child frequency spectrum; and if each of the two detection confidence indices meets a predetermined condition relating to detection of each of the first and second acoustic footprint noises, a warning is emitted indicating detection of wear of the tyre.