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US 11,590,807 B2Granted
Method for the detection of a change in the rolling radius of a tire, and associated monitoring
AssigneeCompagnie Generale Des Etablissements Michelin
InventorsJacques Charreyron, Martin Journois, Jacques De Giacomoni
Life of this patent
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Abstract
A method for detecting a change in the rolling radius of a tire and a method for monitoring the state of the tire are based on the analysis of signals representing an actual speed of a vehicle on which the tyre is fitted and a speed of rotation of the wheel bearing the vehicle.
Claims6
A method for determining a change in a rolling radius of a tire fitted on a vehicle, the method comprising the steps:
- obtaining a first signal representing an actual speed of the vehicle for a first period of time by obtaining geolocation data of the vehicle;
- obtaining a second signal representing a speed of rotation of the vehicle wheel bearing the tire for the same period of time by reading data transmitted on a CAN bus of the vehicle;
- selecting and processing data constituting the first and the second signals so as to make them comparable, wherein the step of selecting and processing data comprises:
- eliminating data representing a speed greater than a predetermined speed threshold;
- deriving a signal;
- and
- eliminating data of the derived signal representing an acceleration less, in absolute terms, than a predetermined acceleration threshold;
- after the selecting and processing step, calculating a ratio of the first signal and the second signal in the form of a set of data;
- determining a set of statistical indicators representative of the set of data;
- and
- determining a change in the rolling radius of the tire based on the statistical indicators in order to monitor the wear of the tire.
8 more elements
Dependencies are inferred from the claim text.