Method and device for detecting tyre wear or the like
First Claim
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1. A method for monitoring the wear of a tire on a vehicle comprising steps of:
- providing at least one tread wear indicator on or in said tire, said at least one tread wear indicator adapted to generate a turn of the wheel harmonic signal when said tread wear indicator become exposed due to wear in the tire or when said tread wear indicator becomes worn and disappears;
detecting said turn of the wheel harmonic signal;
extracting a turn of the wheel harmonic component of said signal; and
identifying tread wear of the tire based on the extracted turn of the wheel harmonic component.
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Abstract
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™. 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.
24 Citations
51 Claims
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1. A method for monitoring the wear of a tire on a vehicle comprising steps of:
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providing at least one tread wear indicator on or in said tire, said at least one tread wear indicator adapted to generate a turn of the wheel harmonic signal when said tread wear indicator become exposed due to wear in the tire or when said tread wear indicator becomes worn and disappears; detecting said turn of the wheel harmonic signal; extracting a turn of the wheel harmonic component of said signal; and identifying tread wear of the tire based on the extracted turn of the wheel harmonic component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for monitoring the wear of a tire on a vehicle, said tire including at least one tread wear indicators on or in said tire, said tread wear indicator adapted to generate a turn of the wheel harmonic signal when said tread wear indicator becomes exposed due to wear in the tire or when said tread wear indicator becomes worn and disappears, said system comprising:
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one or more sensors for detecting the turn of the wheel harmonic signal generated by said at least one tread where indicators; means for extracting a turn of the wheel harmonic component of said turn of the wheel harmonic signal; and means for identifying tread wear of the tire based on the extracted turn of the wheel harmonic component. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method of manufacturing a tire comprising steps of:
providing at least one tread wear indicator on or in said tire, said at least one tread wear indicator adapted to generate a signal when said tread wear indicator become exposed due to wear in the tire or when said tread wear indicator becomes worn and disappears, said signal having an harmonic component that indicates tread wear of the tire. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
Specification