US 12,070,971 B1
Device and method for automatically determining wear of tires
Boaz Mizrachi, Sede Warburg (IL); Jacobus Daniel Potgieter, Netanya (IL); Stanislav Shapira, Nahariya (IL); and Michael Zak, Haifa (IL)
Assigned to TACTILE MOBILITY LTD., Haifa (IL)
Filed by TACTILE MOBILITY LTD., Haifa (IL)
Filed on Jul. 19, 2023, as Appl. No. 18/223,767.
Int. Cl. B60C 11/24 (2006.01)
CPC B60C 11/246 (2013.01) 22 Claims
OG exemplary drawing
 
1. A method of determining the wear of a tire, the method comprising, using a computing device operating a processor:
based on signals from one or more sensors of a vehicle, the one or more sensors comprising a wheel speed sensor, a pressure sensor and a torque sensor, determining a plurality of tire parameters of a tire, the tire parameters comprising a load acting on the tire, a rotational speed of the tire, a pressure within the tire, a torque acting on the tire and a slip of the tire;
based on the load acting on the tire, the rotational speed of the tire and the pressure within the tire, determining a normalized rolling radius of the tire, the normalized rolling radius being an effective rolling radius of the tire under a zero rotational speed, a zero load or both;
based on a change in the normalized rolling radius of the tire over a period of time, determining, in real time, during a ride of the vehicle, an average wear value of the tire;
based on at the load acting on the tire, the rotational speed of the tire and the pressure within the tire, the torque acting on the respective tire and the slip of the respective tire, determining a normalized stiffness of the tire, the normalized stiffness of the tire being an effective stiffness of the tire under a zero torque; and
based on the change in the normalized rolling radius of the tire and a change of the normalized stiffness of the tire over the period of time, determining, in real time, during a ride of the vehicle, at least one of an irregular wear type of the tire and an irregular wear value of the tire;
transmitting a notification related to at least one of the determined average wear value, the determined irregular wear type and the determined irregular wear value to a tire management system to allow monitoring tires in real-time.