A method for determining a rotational frequency of a wheel, in particular of a motor vehicle, uses a rate of rotation sensor that has a rotary sensor assigned to the wheel and a sensor element assigned to the rotary sensor. The rotary sensor has pulse generators that are arranged in a manner distributed over its circumference and spaced evenly from one another and whose edges are recorded by the sensor element so as to determine the rotational frequency of the rotary sensor. There is provision to use an optimal filter in order to compensate a modulation caused by an eccentricity, and to adapt modulation parameters of the optimal filter through a sequential least-squares method. A time-equidistant frequency signal is subjected to short-term averaging, for example using a PT1 filter, and the modulation is modelled as sinusoidal interference and compensated.

A method is provided for evaluating wheel sensor signals of a wheel speed sensor where the wheel speed sensor supplies signals that are transmitted using two different protocols. Each protocol comprises a start pulse and a number of data pulses. A first processor unit receives the signals from the sensor and uses the start pulse to determine whether they were transmitted using the first protocol or the second protocol. Depending on the result, the first processor unit signals without a time delay whether a start pulse has been received via an ASO interface of a second processor unit, wherein a variable pulse width is used to indicate whether the start pulse belongs to a data packet that is transmitted with the first protocol or with the second protocol. The second processor provides each incoming ASO signal with a time stamp, so that the speed can be determined.

A controller is for a vehicle system. The controller includes: at least one terminal for exchanging signals with a peripheral device that is connected to the terminal; a processing unit that is connected or connectable to the at least one terminal and that is configured to process signals that can be transmitted via the terminal; and, at least one operating unit for operating the at least one terminal. The controller has a switch-over unit that is configured to switch over between at least two operating modes for the at least one terminal. The switch-over unit is configured to select the operating mode in dependence upon whether the peripheral device connected to the respective terminal is also simultaneously connected to a further controller via a y-connection, or being directly cabled is connected only to the respective terminal of the controller.

A control unit for controlling a heavy-duty vehicle is arranged to obtain an initial inverse tire model configured to represent a preliminary relationship between wheel slip and generated longitudinal wheel force for at least one wheel of the heavy-duty vehicle. The control unit obtains data from a tire thread deflection sensor configured to measure an amount of tire thread deflection associated with the at least one wheel, and an amount of wheel slip of the at least one wheel corresponding to the amount of tire thread deflection. The control unit updates the obtained initial inverse tire model based on the amount of tire thread deflection and on the corresponding amount of wheel slip. The control unit controls the heavy-duty vehicle by configuring a target wheel speed or a target wheel slip of the at least one wheel based on the updated inverse tire model to generate a target longitudinal wheel force.

A method for determining the moisture of a ground on which a tire mounted on a vehicle is running, the tire being fitted with a sensor configured to acquire a measurement signal representative of the change in the curvature of the tire as it runs over a ground, comprises the following steps: acquiring a measurement signal representative of the change in the curvature of the tire while it is running; determining measurement data comprising (a) a first parameter (KS.sub.in) representative of a rate at which the tire flattens on contact with the ground, and (b) a second parameter (KS.sub.out) representative of a rate at which the tire regains its shape on becoming separated from the ground; and determining the moisture of the ground as a function of the first parameter (KS.sub.in) and the second parameter (KS.sub.out).

An intelligent intervention method based on an integrated tire pressure monitoring system includes monitoring a tire pressure and a tire temperature of a vehicle, and monitoring, a wheel speed of the vehicle; transmitting the tire pressure, the tire temperature and the wheel speed to a host; judging in real time whether the vehicle is in a normal status or in an abnormal status, via integrating the tire pressure, the tire temperature and the wheel speed; producing a deviation signal, when the tire pressure, the tire temperature and the wheel speed deviate from normal thresholds and transmitting the deviation signal to an intelligent intervention system; and performing intelligent intervention to slow down the vehicle in a straight line until the vehicle stops, when the deviation signal is received. The method enables the vehicle to run safely until stopping even in case of tire blowout, so as to prevent rollover or collision.

An intelligent intervention method based on an integrated tire pressure monitoring system includes monitoring a tire pressure and a tire temperature of a vehicle, and monitoring, a wheel speed of the vehicle; transmitting the tire pressure, the tire temperature and the wheel speed to a host; judging in real time whether the vehicle is in a normal status or in an abnormal status, via integrating the tire pressure, the tire temperature and the wheel speed; producing a deviation signal, when the tire pressure, the tire temperature and the wheel speed deviate from normal thresholds and transmitting the deviation signal to an intelligent intervention system; and performing intelligent intervention to slow down the vehicle in a straight line until the vehicle stops, when the deviation signal is received. The method enables the vehicle to run safely until stopping even in case of tire blowout, so as to prevent rollover or collision.

A tire monitoring device comprising a sensor for monitoring a tire parameter and a first controller for controlling the operation of the device. A measurement apparatus is provided for generating parameter measurement data from the sensor output signal. A second controller is provided for controlling the operation of the measurement apparatus. The second controller communicates parameter data to the first controller based on the measurement data. The device is particularly suited to monitoring tire pressure and detecting tire burst events.

An automated or autonomous vehicle obtains measurements from at least a first tire sensor, where the measurements reflect a grip state and/or grip margin. The tire sensor information be synchronized with location information, identifying a location where the tire sensor information was obtained.

An optimal tire slip ratio estimation system and method affixes a tire-identification device to a vehicle tire to provide a tire-specific identification and one or more sensors affixed to the tire for measuring one or more tire-specific parameters. A model-based optimal slip ratio estimator generates a model-derived optimal tire slip ratio estimation based upon an assessment of sensor-derived tire-specific parameter information based on the tire-specific identification.