US Patent 11685197 Tire wear estimation

A tire wear estimator includes a tire measurement system adapted to be mounted in or on an inner surface of the tire. The tire measurement system comprises a sensor adapted for sensing a physical property of the tire, and an acquisition system adapted for sampling a signal of the sensor into memory, to acquire a perturbation in the sampled data induced by a contact patch of the tire when the sensor is mounted in or on an inner surface of the tire. A sample rate of the acquisition system is high enough so at least one oscillation, which indicates a tread depth of the tire, becomes detectable in the sampled data in and/or around the perturbation.