A method for obtaining the deformation of a tire casing subjected to a load, rotating at a rotational speed W, comprises the following steps: acquiring a signal comprising the amplitude of the acceleration in the direction normal to the crown when running at the rotational speed W; delimiting the signal over a number of wheel revolutions, so as to construct a wheel revolution signal; determining a reference acceleration; defining a first energy density S which is a function of the wheel revolution signal, and of the reference acceleration, and which is denoted S.sup.+ when the wheel revolution signal is above a threshold value A, or is denoted S.sup.? when the wheel revolution signal is below or equal to said threshold value A; and identifying the deformation generated by the load as a function of the reference acceleration and of the first energy density S.

An indirect tire pressure monitoring (WSB TPMS) method includes establishing a wheel speed reference value database using a vehicle speed, and correcting the real-time wheel speed through tire wear compensation, and then based on a comparative analysis of the real-time wheel speed and the wheel speed reference value, determining the degree of tire deflection deformation and tire safety, and to give an alert message prompt based on the tire pressure abnormality information.

The present invention relates to a method for testing or verifying the indirect pressure monitoring system of the wheels (TW) of a vehicle (V).

Examples provide a method, a component, a tire-mounted TPMS module, a TPMS system and a machine readable storage or computer program for determining time information of at least one contact patch event of a rolling tire and a method for locating a tire. A method for determining time information of at least one contact patch event of a rolling tire, comprises obtaining information indicative of a rotational rate of the tire; obtaining a sequence of samples indicative of at least an acceleration component during at least one rotation of the tire; and determining a position of at least one reference sample in the sequence, wherein the position of the at least one reference sample is indicative of the time information of the contact patch event of the rolling tire.

Examples provide a method, a component, a tire-mounted TPMS module, a TPMS system and a machine readable storage or computer program for determining a duration of at least one contact patch event of a rolling tire. A method for determining a duration of at least one contact patch event of a rolling tire, comprises obtaining a sequence of acceleration measurement samples of the rolling tire from a tire-mounted acceleration sensor; and determining the duration of the contact patch event based on acceleration measurement samples of the sequence between a first time instance when the acceleration measurement samples cross a first threshold and a second time instance when the acceleration measurement samples cross a second threshold.

A system includes sensor modules, each associated with a wheel on a vehicle, and a receiver unit. Each sensor module calculates a rotation period associated with the wheel during turn mode vehicular motion and determines rotation direction of the associated wheel during straight vehicular motion. A data packet that includes a unique identifier for the sensor module, the rotation period, and the rotation direction are transmitted from each sensor module for receipt at the receiver unit. The receiver unit determines the steered wheels and non-steered wheels based on the rotation period, and the receiver unit can determine which wheels are on the right side or the left side of the vehicle based on the rotation direction. Knowledge of the steered and non-steered wheels and the rotation direction of the wheels, enables the receiver unit to assign locations of the sensor modules, and hence positions of the wheels of the vehicle.

Embodiments provide a fail-safe device, a tire pressure measurement system, a vehicle, a tire, a method and a computer program for monitoring a first sensor of a tire pressure monitoring system. The fail-safe device includes a first input for a first signal from the first sensor. The first signal indicates a first physical quantity. The fail-safe device includes a second input for a second signal from a second sensor. The second signal indicates a second physical quantity. The fail-safe device further includes a control module to verify the first signal based on the second signal and a physical relation between the first and the second physical quantities.

A system and method of estimating a load bearing on a vehicle tire includes an inflation pressure measuring sensor for measuring an inflation pressure level within a tire cavity; a contact patch length sensor measuring the rolling contact patch length of the tire; a tire rolling speed sensor measuring a rolling speed of the tire; and a tire wear state estimation calculator estimating a tire wear state of a tread of the tire. An artificial neural network estimates a tire load from the contact patch length, the inflation pressure level, and the tire rolling speed by utilizing as a compensation factor input the estimated tire wear state.

A system for monitoring parameters of a vehicle wheel assembly includes a wheel speed sensor configured to produce a wheel speed signal, and a wheel assembly monitoring module operatively connected to the wheel speed sensor. The wheel assembly monitoring module determines a dynamic response of the wheel speed signal at one or more wheel speeds. A wheel assembly health module provides one of a visual output, an audible output, and a haptic output indicating that the wheel assembly has exceeded a selected wheel assembly parameter threshold based on the dynamic response of the wheel speed signal.

A wheel parameter resolving system, apparatus and method are disclosed and described. The wheel parameter resolving system comprises a wheel unit configured to sense radial acceleration in a wheel, the wheel comprising a rim and a tire, the rim having a diameter, and a transmitter configured to transmit a transmit signal indicative of sensed radial acceleration, a controller configured to resolve a rotation parameter indicative of the rim diameter in response to the sensed radial acceleration, and a receiver configured to receive a receive signal based on a transmit signal indicative of sensed radial acceleration, the receiver communicatively coupled to the controller. Resolving the rotation parameter comprises calculating the rotation parameter based on the sensed radial acceleration and a predetermined roll parameter.