Method of detecting an occurrence of hydroplaning of a tire on a road
First Claim
1. A method of detecting an occurrence of hydroplaning of a tire of a vehicle travelling on wet ground, a tread of the tire being equipped with one or more sensors each capable of measuring a compression experienced locally by the tread when the tire is rolling on the ground and of producing a signal corresponding to measurements made by the one or more sensors, the method comprising:
- obtaining measurements of a compression when a tire is rolling on the ground;
producing a signal corresponding to the measurements;
extracting a portion of the signal relating to a passing of one or more sensors into an apparent area of contact between a tread of the tire and the ground;
determining an instantaneous value (Δ
E, Rz), corresponding to a presence of an indirect contact region of the apparent area of contact between the tread of the tire and the ground, based on the extracted portion of the signal, and;
triggering an alarm when the instantaneous value satisfies a given relationship, wherein the determining of an instantaneous value Δ
E includes;
differentiating the signal,determining a minimum value
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Accused Products
Abstract
In a method of detecting an occurrence of hydroplaning of a tire of a vehicle travelling on wet ground, a tread of the tire of the vehicle is equipped with one or more sensors each capable of measuring a compression experienced locally by the tread when the tire is rolling on the ground and of producing a signal corresponding to these measurements. According to the method, measurements are obtained of a compression when the tire is rolling on the ground; a signal corresponding to these measurements is produced; a portion of the signal relating to a passing of one or more sensors into an apparent area of contact between the tire and the ground is extracted; an instantaneous value (ΔE, Rz), corresponding to a presence of an indirect contact region of the apparent area of contact between the tread and the ground, is determined from the extracted portion of the signal; and an alarm is triggered when the instantaneous value satisfies a given relationship.
22 Citations
11 Claims
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1. A method of detecting an occurrence of hydroplaning of a tire of a vehicle travelling on wet ground, a tread of the tire being equipped with one or more sensors each capable of measuring a compression experienced locally by the tread when the tire is rolling on the ground and of producing a signal corresponding to measurements made by the one or more sensors, the method comprising:
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obtaining measurements of a compression when a tire is rolling on the ground; producing a signal corresponding to the measurements; extracting a portion of the signal relating to a passing of one or more sensors into an apparent area of contact between a tread of the tire and the ground; determining an instantaneous value (Δ
E, Rz), corresponding to a presence of an indirect contact region of the apparent area of contact between the tread of the tire and the ground, based on the extracted portion of the signal, and;triggering an alarm when the instantaneous value satisfies a given relationship, wherein the determining of an instantaneous value Δ
E includes;differentiating the signal, determining a minimum value - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for detecting an occurrence of hydroplaning of a tire of a vehicle travelling on wet ground, the tire including tread equipped with one or more sensors each configured to measure compressive stresses experienced locally by the tread rolling on the ground, and the tire including a transmitter for transmitting a signal corresponding to measurements of stresses sensed by the one or more sensors, the device comprising:
a signal processing unit that extracts, from the transmitted signal, a signal portion corresponding to a number or to a duration of passage of the one or more sensors in an area of contact of the tread of the tire rolling on the ground, wherein the signal processing unit is configured to execute a program for implementing a method of detecting an occurrence of hydroplaning based on the extracted signal, the method including; obtaining measurements from the one or more sensors of a compression when the tire is rolling on the ground; producing a signal corresponding to the measurements; extracting a portion of the signal relating to a passing of the one or more sensors into an apparent area of contact between the tread of the tire and the ground; determining an instantaneous value (Δ
E, Rz), corresponding to a presence of an indirect contact region of the apparent area of contact between the tread of the tire and the ground, based on the extracted portion of the signal; andtriggering an alarm when the instantaneous value satisfies a given relationship, wherein the determining of an instantaneous value Δ
E includes;differentiating the signal, determining a minimum value
Specification
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- Resources
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Current AssigneeCompagnie générale des établissements Michelin
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Original AssigneeMichelin Recherche et Technique SA (Compagnie Generale DES Etablissements Michelin SCA)
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InventorsSpetler, Frederic
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Primary Examiner(s)Caputo; Lisa M
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Assistant Examiner(s)Jenkins; Jermaine
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Application NumberUS12/061,973Publication NumberTime in Patent Office957 DaysField of SearchNoneUS Class Current73/146CPC Class CodesB60T 2210/13 Aquaplaning, hydroplaningB60T 8/1725 Using tyre sensors, e.g. Si...
