Determining tread depth using data from a tire-mounted sensor
Determining tread depth using data from a tire mounted sensor (TMS), including: determining, based on data collected by the tire mounted sensor, a tire deformation for a tire; determining, based on the tire deformation, an effective rolling radius of the tire; and determining, based at least on the effective rolling radius of the tire, an estimated tread depth for the tire.
1. A method of determining tread depth using data from a tire mounted sensor (TMS), the method comprising:
determining, by the tire mounted sensor (TMS) based on data collected by the TMS, a tire deformation for a tire;
receiving, by the TMS, at least a linear velocity parameter from a vehicle control system of a vehicle on which the tire is mounted, the linear velocity parameter indicating a value of a linear velocity of a wheel center;
determining, by the TMS, an effective rolling radius of the tire based on at least the tire deformation, the linear velocity parameter, and an angular velocity parameter; and
determining, by the TMS based at least on the effective rolling radius of the tire, an estimated tread depth for the tire.
2. The method of claim 1 , further comprising receiving, by the TMS, the angular velocity parameter from the vehicle control system, the angular velocity parameter indicating a value of an angular velocity of a wheel of the vehicle.
3. The method of claim 1 , wherein the linear velocity is based on a Global Positioning System (GPS) doppler velocity.
4. The method of claim 1 , wherein the angular velocity is based on wheel speed sensor data.
5. The method of claim 1 , wherein determining the tire deformation for the tire comprises determining, based on radial acceleration data, a contact patch length.
6. The method of claim 1 , wherein determining the estimated tread depth is further based on one or more tire stiffness coefficients.
7. The method of claim 6 , wherein the one or more tire stiffness coefficients are stored in a memory of the TMS.
8. The method of claim 1 , further comprising sending, by the TMS, the estimated tread depth to the vehicle control system.
9. A tire mounted sensor (TMS) comprising:
a memory;
a transceiver;
one or more accelerometers; and
a processor configured to perform the steps comprising:
determining, based on data collected by the TMS, a tire deformation for a tire;
receiving at least a linear velocity parameter from a vehicle control system of a vehicle on which the tire is mounted, the linear velocity parameter indicating a value of a linear velocity of a wheel center;
determining, an effective rolling radius of the tire based on at least the tire deformation, the linear velocity parameter, and an angular velocity parameter; and
determining, based at least on the effective rolling radius of the tire, an estimated tread depth for the tire.
10. The TMS of claim 9 , further comprising receiving, by the TMS, the angular velocity parameter from the vehicle control system, the angular velocity parameter indicating a value of an angular velocity of a wheel of the vehicle.
11. The TMS of claim 9 , wherein the linear velocity is based on a Global Positioning System (GPS) doppler velocity.
12. The TMS of claim 9 , wherein the angular velocity is based on wheel speed sensor data.
13. The TMS of claim 9 , wherein determining the tire deformation for the tire comprises determining, based on radial acceleration data, a contact patch length.
14. The TMS of claim 9 ,
wherein determining the estimated tread depth is further based on one or more tire stiffness coefficients.
15. The TMS of claim 14 , wherein the one or more tire stiffness coefficients is stored in the memory of the TMS.
16. The TMS of claim 9 , wherein the steps further comprise sending, to the vehicle control system, the estimated tread depth.