Method for detecting wear of a tyre containing a sonic wear gauge

摘要

A method for detecting wear of a tire involves at least one sonic wear gauge emitting an acoustic footprint noise that includes several acoustic footprint elementary frequency components. An acoustic signal that includes the acoustic footprint noise is acquired, with the acoustic signal including several elementary frequency components acquired in the frequency domain. Several series of elementary frequency components are enumerated, with each enumerated series forming some part of the acoustic footprint elementary frequency components. An acoustic footprint series is determined and, if a confidence index determined based on a local confidence index is greater or less than a predetermined threshold, an alert regarding the wear of the tire is emitted.

主权项

1. A method for detecting wear of a tyre, wherein the tyre includes at least one sonic wear gauge emitting, based on a predetermined radial wear threshold, an acoustic footprint noise that includes a plurality of acoustic footprint elementary frequency components, the method comprising steps of:
acquiring an acoustic signal that includes the acoustic footprint noise; enumerating a plurality of series of elementary frequency components, each enumerated series of the enumerated plurality of series forming at least a part of the elementary frequency components of the acoustic signal; selecting an acoustic footprint series from among the enumerated plurality of series, wherein the acoustic footprint series forms at least part of a Dirac comb; determining a local confidence index of the acoustic footprint series; and emitting a tyre wear alert, when a confidence index, which is determined based the local confidence index, is in absolute value at least one of greater than, less than, and equal to a predetermined threshold associated with the confidence index.