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.

A tire wear state estimation system includes a CAN bus system disposed on a vehicle. A tire supporting the vehicle is mounted on a wheel. A wheel sensor unit is mounted on a structure adjacent the wheel, and the wheel sensor unit includes a longitudinal acceleration sensor to generate a longitudinal acceleration signal. The wheel sensor unit also includes a vertical acceleration sensor to generate a vertical acceleration signal, and transmission means to communicate the longitudinal acceleration signal and the vertical acceleration signal to the CAN bus system. A processor receives the longitudinal acceleration signal and the vertical acceleration signal. An extractor extracts a tire translational mode from the longitudinal acceleration signal and a tire vertical mode from the vertical acceleration signal. The tire translational mode and the tire vertical mode are input into a classifier to generate a wear state estimation for the tire. A method is also provided.

This application relates to a tire monitoring system. In one aspect, the system includes a sensor module installed in a tire provided in a vehicle to obtain tire data and a communication module. The communication module may include a transceiver configured to transmit and receive the tire data, and an output unit configured to output one of a caution signal and a warning signal. The communication module may also include a controller configured to determine whether a state of the tire is abnormal based on the tire data and control the output unit to output one of the caution signal and the warning signal based on the determination result.

A device for measuring and/or monitoring tire-related variables of a vehicle, having a sensor unit for transmitting, receiving and processing signals, wherein a transmission signal is emitted by an antenna unit of the sensor unit in the direction of an object being measured and wherein a reflection signal reflected by the object being measured is received and analysed, the sensor unit having a transceiver device, via by means of which a reflection factor, formed as the quotient from the reflection signal reflected by the object being measured and the transmission signal, is measured and via which a resonance frequency and/or a phase difference between the transmission signal and the reflection signal is determined, wherein the transceiver unit comprises a vector network analyser and an analysis unit, so that a distance to the object being measured is established by detecting the phase difference between the transmission signal and the reflection signal.

Methods, apparatuses, computer program products, systems for enhanced tracking of tire tread wear are disclosed. In a particular embodiment, a tire monitoring sensor (TMS) detects a tread wear reporting event, generates tread wear data including at least a rotational time period, and transmits the tread wear data to a vehicle control system (VCS). The rotational time period may be a measure of time the tire takes to complete a particular number of revolutions. The VCS receives, from the TMS, the tread wear data including at least the rotational time period, determines a current circumference of the tire based on at least the rotational time period, and determines a tread wear value based on at least the current circumference.

Described herein are systems and methods for determination of rolling resistance from a sensor or sensors in a tire or tires for application in smart cars to provide feedback to interested parties, such as Departments of Transportation or tire manufacturers.

A vehicle includes: a tire monitor, located in a wheel arch and configured to: project beam(s) onto a tire, measure reflection(s) of the beam(s); memory, processor(s) configured to, based on the reflection(s): build a two-dimensional (2D) profile of the tire, compare depths of the built profile to depths of a preloaded profile, assess tire wear based on the comparison.

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.

A tire or tire tread features a helical, metallic RFID tag antenna, configured to provide an operable frequency response between 900 and 930 MHz upon receiving 100 electromagnetic waves having a power between 12 and 24 dBm. The helical, metallic RFID tag antenna is disposed within the at least one tread feature and has a wear rate commensurate with a wear rate of the at least one tread feature. The response(s) from the helical, metallic RFID tag antenna are used to track tread wear.

A tire includes a plurality of tire components defining a plurality of layers. A radio frequency identification (RFID) tag is disposed between at least two of the plurality of layers. The RFID tag is in contact with each of the at least two layers and is configured to transmit a response signal in response to receiving a request signal. When no air is in a region surrounding the RFID tag, a first response signal is emitted from the tire at a first frequency and first power. However, when air is in the region surrounding the RFID tag, a second response signal is emitted from the tire at the first frequency and a second power different from the first power.