| 摘要 |
When the tire reaches a limit of wear level, tire wear indicators generate an acoustic signal by knocking the ground. Magnetic, optical and mechanical versions exist. A detector made of a microphone located under the vehicle and a processing central unit switches on a warning included in the dashboard. In a more sophisticated version, the detector recognizes the incriminated wheel using the phase of the acoustic signal and the information from the ABS(TM). Application to the detection of the decay of a tire, or any other type of wear surface such as pad, or similar, and to the detection of the presence of snow chains or spikes.
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