Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Thomas Ledoux

Denis Martin

Guillaume Heredia

Alexandre Pernot

Patrick Meneroud

Grégory Michaud

Nicolas Fangeat

Frank Claeyssen

Frédéric Domprobst

Benoït Gandar

Timothée Forissier

Alexandre Pagès

Cédric Goeau

Nathalie Levain

A method for determining a running parameter of a vehicle travelling on a road, based on a measurement of a sound signal produced by a tire of the vehicle, and on measurements and estimations of running conditions effected in real time.

Method for detecting road and tire conditions

A method for providing a service linked to the condition and/or behavior of a vehicle and/or of a tire comprises the following steps: when a vehicle passes a road infrastructure equipped with a system for assessing the condition of a vehicle, determining an identifier of the vehicle and/or of a tire of the vehicle, at the same time, determining at least one parameter representative of the condition of the vehicle and/or of a component of the vehicle, transmitting the determined data to a remote data server, from the identification data, retrieving external data concerning the vehicle and/or the tire and/or the running conditions, combining the determined information with the external data such as to determine a relevant indicator concerning the condition and/or the behavior of a vehicle, and transmitting the relevant indicator to a provider of a service linked to the condition and/or to the behavior of a vehicle and/or of a tire.

Method for providing a service linked to the condition and/or behavior of a vehicle and/or of a tire

The method for organizing a group of several separate vehicles in a platoon includes an identification step (a) in order to identify the candidate vehicles that are to form the platoonp The method also includes an acquisition step (b) in order to acquire, for each candidate vehicle, at least one parameter associated with a tire of the candidate vehicle, such as the wet grip index of the tire tyre, referred to as the 'tire parameter'. Subsequently, based on the tire parameter, a processing step (c) for determining the rank attributed to the particular candidate vehicle in the platoon and/or the inter-vehicle distance which, at a given speed, must separate the candidate vehicle in question from the vehicle immediately in front in the platoon.

Method for managing a platoon of trucks on the basis of information relating to the tires with which the trucks of said platoon are equipped

A system is provided for measuring a thickness of rubber layer of a tire. The layer includes a joined face, which is joined to an adjacent metal reinforcement, and a free face in contact with air. The system includes a casing with an application face for contacting the free face, and a sensor positioned in the casing and structured to measure a distance d between the joined face and the free face. The sensor includes a source coil and an adjacent sensing element. The source coil is a source of an alternating magnetic field. The sensing element includes a sensing device configured to produce an output signal that is dependent on an induced local magnetic field. An excitation power and a frequency of the source coil are such that the local magnetic field induced between the reinforcement and the source coil increases in strength as the distance d decreases.

System for determining the thickness of a rubber layer of a tire

A system for evaluating a condition of a tire includes a housing placed on a ground surface, a wear detector that detects a wear condition of the tire when the tire passes over the housing, a tire presence detector that detects a presence of the tire over the housing, and an electronic activator that activates the wear detector during detection of the presence of the tire by the tire presence detector.

System for evaluating the condition of a tire including tire wear detector and tire presence detector

A system is provided for assessing a condition of a tire. The system includes first and second individual modules, a data transmission gateway, and a collaboration device. The first and second individual modules are for assessing the condition of the tire. Each of the first and second individual modules includes a housing, which is structured to be placed on a ground surface, and a data transmitter. The housing includes at least one detector arranged to enable a parameter of the tire to be assessed as the tire passes over the housing. The data transmission gateway is structured to transmit data between the first and second individual modules and a remote database. The collaboration device is structured to enable data from the first individual module to be used collaboratively with data from the second individual module.

System for assessing the condition of a tire

A method for detecting an underflation state of a tire fitted on a vehicle is provided. The method includes determining a first contact patch measurement of a first tire fitted on the vehicle, determining a second contact patch measurement of a second tire fitted on the vehicle, and comparing the first and second contact patch measurements. An underinflation situation is inferred if a difference between the first and second contact patch measurements is greater than a predetermined signalling threshold.

Method for detecting and signalling the under-inflation state of a tire

A system for counting wheel revolutions made by a wheel of a vehicle, the system including an electronic counter, a transmitter, a housing, and a connector. The electronic counter counts a number of wheel revolutions made by the wheel. The transmitter transmits data from the electronic counter to a remote database. The housing houses the electronic counter. The connector removably attaches the housing to a nut anti-loosening device installed on the wheel.

Removable system for counting wheel revolutions

A system, which is structured to evaluate a condition of a tire, includes a housing, a tire-wear detector, a tire-presence detector, and an electronic activator. The housing, when the system is deployed, is placed on a ground surface. The tire-presence detector detects a presence of a tire on the housing. The electronic activator activates the tire-wear detector when the tire-presence detector detects the presence of the tire on the housing. The tire-wear detector, when activated, detects a wear condition of the tire when the tire passes over the housing.

System for evaluating the condition of a tire

A method is provided for measuring a thickness of a layer of rubber-like material. The layer of rubber-like material includes a free face in contact with air and a face joined to an adjacent reinforcement made of elements electrically insulated from one another. Each of the elements includes at least one hysteretic material having a magnetic permeability greater than the magnetic permeability of air. According to the method, a sensitive element, which emits an alternating magnetic field, is brought towards the layer of rubber-like material whose thickness is to be measured, hysteretic losses in the adjacent reinforcement are measured at terminals of the sensitive element, and a thickness of the layer of rubber-like material is evaluated based on the hysteretic losses.

Method for measuring the thickness of a layer of rubber-like material

A system for measuring a thickness of a layer of rubber material of a tire includes a sensor. The layer includes a joined face, which is joined to an adjacent metal reinforcement, and a free face, which is in contact with air. The sensor, which measures a distance d between the joined face and the free face, includes a source of a static magnetic field and a sensitive element whose output signal is a function of a level of a local magnetic field. The sensor is positioned in such a way that a magnetic field strength measured by the sensitive element varies when the distance d decreases.

System for determining the thickness of a layer of rubber for a tire

A magnetometric device for evaluating a physical parameter (D, K), comprising a circuit () which is sensitive to a magnetic field, a measurement circuit () and a magnetic field generator (), the sensitive circuit () being subjected to a magnetic field which varies with the physical parameter to be measured and having an electrical characteristic which is evaluated by the measurement circuit and which varies as a function of the magnetic field. The field generator () is designed to reverse the polarity of the applied magnetic field, the evaluation of the physical parameter thus being able to be corrected of the parasitic influence of the terrestrial magnetic field.

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Clermont-Ferrand, France

Thomas Ledoux