Alarm method for indicating the wear of a tyre with a groove
First Claim
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1. A method for alerting to wear of a tyre that includes a tread strip equipped with at least one circumferential groove, the method comprising steps of:
- measuring sound signals made by the tyre running along a ground;
from the measured running sound signals, isolating a sound signal emitted in a predetermined range of frequencies close to a predetermined resonant frequency of a portion of the circumferential groove during running;
measuring an amplitude of the isolated sound signal; and
comparing the measured amplitude against a predetermined alert threshold wherein the tyre when in new condition includes a subsurface circumferential channel embedded in the tread strip, the subsurface circumferential channel forming the circumferential groove when the tyre becomes worn.
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Abstract
In a method for alerting to the wear of a tire that includes a tread strip equipped with at least one circumferential groove,
- the running noise made by the tire running along a ground is measured,
- from the measured running noise, a noise emitted in a predetermined range of frequencies close to a predetermined resonant frequency of a portion of the circumferential groove during running is isolated,
- the amplitude of the isolated noise is measured, and
- the measured amplitude is compared against a predetermined alert threshold.
13 Citations
8 Claims
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1. A method for alerting to wear of a tyre that includes a tread strip equipped with at least one circumferential groove, the method comprising steps of:
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measuring sound signals made by the tyre running along a ground; from the measured running sound signals, isolating a sound signal emitted in a predetermined range of frequencies close to a predetermined resonant frequency of a portion of the circumferential groove during running; measuring an amplitude of the isolated sound signal; and comparing the measured amplitude against a predetermined alert threshold wherein the tyre when in new condition includes a subsurface circumferential channel embedded in the tread strip, the subsurface circumferential channel forming the circumferential groove when the tyre becomes worn. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification