A tire position determination system includes a first tire detector, a revolving body detector, and a monitoring unit. The first tire detector is attached to a first tire and detects an acceleration. The revolving body detector is attached to a first revolving body and detects an acceleration. The monitoring unit obtains first correspondence representing relation between a first value and a second value during a first period, obtains second correspondence representing relation between a third value and a fourth value during a second period, compares the first correspondence and the second correspondence with each other, and determines whether or not the first tire revolves in synchronization with the first revolving body.

A tire revolution direction determination system includes a detection device arranged in each of two tires coupled back-to-back and a monitoring unit. The detection device includes a first detector that detects a first acceleration in a tire diameter direction and a second detector that detects a second acceleration in the tire diameter direction. The first detector is arranged in front of the second detector in a reference direction. When the monitoring unit receives the first acceleration and the second acceleration from the detection device while a vehicle travels forward, it specifies change over time of the first acceleration and change over time of the second acceleration and determines whether a direction of revolution of the tire where the detection device is arranged is the reference direction based on whether change over time of the first acceleration is more advanced than change over time of the second acceleration.

A wear amount estimation method calculates a shearing force of each rib based on an average grounding pressure of each rib of an aircraft tire; calculates a wear energy of the aircraft tire based on the shearing force; and estimates the wear amount of the aircraft tire based on the wear energy and a wear resistance showing a relationship between a predetermined wear amount. The information related to the aircraft includes an internal pressure of the aircraft tire. The average grounding pressure of each rib is calculated based on the internal pressure and a wheel load applied to the aircraft tire.

An embodiment system for monitoring a tire pressure includes a wheel speed sensor mounted on each wheel of a vehicle, a set button for resetting a pressure setting, and a controller configured to determine whether the tire pressure is low using the wheel speed sensor, output a low pressure warning, determine whether a user has an intention to reset the pressure setting when a manipulation of the set button is sensed after the low pressure warning is output, and reset the pressure setting in response to a response of the user.

The present disclosure relates to a vehicle system and a method for determining a location of a tire pressure sensor. An exemplary embodiment of the present disclosure provides a vehicle system including: a plurality of tire pressure sensors configured to sense air pressure of a tire of a vehicle including a double wheel; a plurality of wheel speed sensors configured to sense a speed of each wheel of the vehicle; and a tire pressure sensor location determining apparatus configured to determine locations of the tire pressure sensors using wheel pulse counter values inputted from the wheel speed sensors whenever the tire pressure sensors transmit tire pressure detection signals.

A method of determining a left or right side installation position of a trailer wheel of a trailer connected to a tow vehicle. A number of rotations of the trailer wheel is determined using an acceleration sensor, and a number of rotations of a left side tow vehicle wheel and a right side tow vehicle wheel is determined using an ABS sensor or ESP sensor of the left side tow vehicle wheel and the right side two vehicle wheel, respectively. A first correspondence value between the number of rotations of the trailer wheel and the number of rotations of the left side tow vehicle wheel is determined. A second correspondence value between the number of rotations of the trailer wheel and the number of rotations of the right side tow vehicle wheel is determined. A left side or right side installation position of the trailer wheel is determined based on the first correspondence value and the second correspondence value.

A first tire pressure sensor module is configured to provide information related to a pressure of a tire of a vehicle and comprises a pressure sensor configured to determine the information related to the pressure of the tire. The pressure module further includes a controller configured to selectively operate the tire pressure sensor module in an active state and in an inactive state, wherein an energy consumption of the tire pressure sensor module is lower in the inactive state than in the active state. The controller is further configured to control an output of the information related to the pressure of the tire in the active state, and operate the tire pressure sensor module in the inactive state based on determining that information related to a velocity of the tire indicates a velocity above a threshold.

The disclosure relates to a method for monitoring behavior of a tire of a vehicle in a rolling condition of the tire, comprising the steps of: acquiring a signal representative of an acceleration of a specified point of the tire, deriving from the signal a curve which represents a profile of the acceleration of the point during a revolution of the tire, determining a leading portion and a trailing portion of the curve, corresponding to an entry of the point into a footprint region of the tire and corresponding to an exit of the point from the footprint region of the tire, respectively, determining a first measure of a volatility of the signal in the leading portion and a second measure of a volatility of the signal in the trailing portion, and determining an indication of the behavior of the tire based on the first measure and the second measure.

A method for determining the loading of a tire (1) mounted on a vehicle (9) and running along the ground, said tire (1) being equipped with a sensor (10), comprises: acquisition, by the sensor (10), of a measurement signal representative of the change in curvature of the tire (1) during running, determination, from the measurement signal, of measurement data comprising a first parameter representative of a length of a contact patch (6) in contact with the ground (7) during a revolution of the wheel bearing the tire, and determination of the loading of the tire (1) as a function of the first parameter, of the internal pressure of the tire, and of a firmness factor representative of a condition of firmness of the ground, which is derived from measurements taken while the tire is rolling over said ground.

A tire physical information estimation system includes a physical information estimation unit and a data acquisition unit. The physical information estimation unit includes a learning type arithmetic model including an input layer through an output layer to estimate physical information related to a tire produced in association with movement of the tire. The data acquisition unit acquires input data input to the input layer. The arithmetic model includes a feature extraction unit that performs a convolution operation in an operation halfway between the input layer and the output layer to extract a feature amount.