Abstract: An electronic unit suitable for being positioned on an internal face of a tread of a tire with a view to measuring operating parameters of a vehicle wheel equipped with the tire. The electronic unit includes: a body, configured to be embedded into the thickness of the tire, in a housing provided for this purpose, and includes sensors dedicated to measuring operating parameters of the wheel, a head, arranged at one end of the body, including a circuit board for managing information output from the sensors of the body and a way of communicating with a central unit installed in the vehicle; a way for connecting the elements with which the body is equipped and the elements with which the head is equipped; and a way to supply the electronic unit with power.

Abstract: A method and a device for determining loads on vehicle's wheels, each with a tire, is disclosed. A deformation measured value and a pressure measured value for each tire, and at least one acceleration measured value for the vehicle are detected. For the respective wheels, dynamic wheel loads are calculated according to a first model and static wheel loads are calculated according to a second model. The second model comprises at least one model parameter calculated by statistical analysis of the calculated dynamic wheel loads, the calculated static wheel loads, and the detected at least one acceleration measured value. The at least one acceleration measured value is redetected and the dynamic wheel loads are recalculated from the previously calculated static wheel loads and the at least one detected acceleration measured value according to the second model using the previously calculated at least one model parameter of the second model.

Abstract: A method for detecting wheel units mounted at wheels of a vehicle and for detecting wheel mounting positions belonging to each of the wheel units is disclosed. The method comprises the steps of: positioning a mobile communication device at a predetermined start position with respect to the vehicle, moving the mobile communication device from the start position along a path around the vehicle, receiving RF signals from the wheel units and measuring the RF signal strengths thereof by the mobile communication device when moving along the path around the vehicle, performing an analysis of variations of the measured RF signal strengths of the received RF signals depending on the position of the mobile communication device along the path, identifying the wheel units and identifying the wheel mounting positions based on a result of the analysis.

Abstract: A method for detecting wheel units mounted at wheels of a vehicle and for detecting wheel mounting positions belonging to each of the wheel units is disclosed. The method comprises the steps of: positioning a mobile communication device at a predetermined start position with respect to the vehicle moving the mobile communication device from the start position along a path around the vehicle receiving RF signals from the wheel units and measuring the RF signal strengths thereof by the mobile communication device when moving along the path around the vehicle performing an analysis of variations of the measured RF signal strengths of the received RF signals depending on the position of the mobile communication device along the path identifying the wheel units and identifying the wheel mounting positions based on a result of the analysis.

Abstract: Disclosed are a method and a system for detecting a faulty arrangement of a sensor module in a sensor module holder in a tire of a vehicle equipped with a tire monitoring system. The detection of a faulty arrangement of a sensor module may be performed by ascertaining on the basis of a comparison of the operating parameters determined by the sensor modules of the tire monitoring system that there is for this sensor module a discrepancy, dependent on a speed of the vehicle, between the operating parameter and an operating parameter to be expected for this sensor module.

Abstract: A method for determining a wheel load acting on a vehicle wheel having a rim, a tire mounted on the rim and a sensor unit mounted at the wheel, includes determining a tire pressure of the tire using the sensor unit, determining a tire footprint of the tire using the sensor unit when the vehicle is driving, determining the wheel load based on a predetermined relationship between the wheel load, the tire pressure and the tire footprint, analyzing temporal variations of the tire pressure during a standstill of the vehicle for determining one or more parameters indicating temporal variations of the tire pressure. A change of the wheel load during the standstill is estimated based on the determined parameters. A device for determining a wheel load and a method and a device for determining a weight of a vehicle are also provided.

Abstract: The subject of the present invention is an electronic unit (1) suitable for being positioned on an inner surface (Fi) of a tread of a tire (P) with a view to measuring operating parameters of a vehicle wheel fitted with said tire, the electronic unit being characterized in that it comprises: a body (2) configured to be embedded within the thickness of said tire, in a housing provided for this purpose, and including sensors (4) for measuring operating parameters of the wheel; a a head (3), arranged at one end of the body and comprising a circuit board (5) for managing information from the sensors on the body and communication means (6) for communicating with a central unit on board the vehicle; connection means (8) for connecting the elements fitted to the body to the elements fitted to the head; and a means (7) for supplying the electronic unit with power.

Abstract: A method of determining the level of quality of a road from an electronic measurement unit mounted in a wheel of a motor vehicle traveling on the road. The electronic measurement unit includes at least one sensor able to measure the vibrations perceived by the tread of the tire of said wheel. The method includes measuring, using the sensor, the vibrations perceived by the tread of the tire of the wheel, calculating the strength of the vibrations measured at a predetermined vibrational frequency referred to as the distinguishing frequency, comparing the calculated strength with predetermined strength values contained in a table stored in a memory zone, which are characteristic of various road quality levels, and determining the level of quality of the road from the comparison made.

Abstract: A method and a device for determining loads on vehicle's wheels, each with a tire, is disclosed. A deformation measured value and a pressure measured value for each tire, and at least one acceleration measured value for the vehicle are detected. For the respective wheels, dynamic wheel loads are calculated according to a first model and static wheel loads are calculated according to a second model. The second model comprises at least one model parameter calculated by statistical analysis of the calculated dynamic wheel loads, the calculated static wheel loads, and the detected at least one acceleration measured value. The at least one acceleration measured value is redetected and the dynamic wheel loads are recalculated from the previously calculated static wheel loads and the at least one detected acceleration measured value according to the second model using the previously calculated at least one model parameter of the second model.

Abstract: A method of determining the level of quality of a road from an electronic measurement unit mounted in a wheel of a motor vehicle traveling on the road. The electronic measurement unit includes at least one sensor able to measure the vibrations perceived by the tread of the tire of said wheel. The method includes measuring, using the sensor, the vibrations perceived by the tread of the tire of the wheel, calculating the strength of the vibrations measured at a predetermined vibrational frequency referred to as the distinguishing frequency, comparing the calculated strength with predetermined strength values contained in a table stored in a memory zone, which are characteristic of various road quality levels, and determining the level of quality of the road from the comparison made.

Abstract: A method for determining a wheel load acting on a vehicle wheel having a rim, a tire mounted on the rim and a sensor unit mounted at the wheel, includes determining a tire pressure of the tire using the sensor unit, determining a tire footprint of the tire using the sensor unit when the vehicle is driving, determining the wheel load based on a predetermined relationship between the wheel load, the tire pressure and the tire footprint, analyzing temporal variations of the tire pressure during a standstill of the vehicle for determining one or more parameters indicating temporal variations of the tire pressure. A change of the wheel load during the standstill is estimated based on the determined parameters. A device for determining a wheel load and a method and a device for determining a weight of a vehicle are also provided.

Abstract: The invention relates to a method for determining a wheel load (WL) acting on a tire (1) of a vehicle, comprising: a) determining a footprint (L) of the tire (1), b) receiving a tire information (ti) that identifies a type of the tire (1) and/or characterizes physical properties of the tire (1) as such, c) receiving tire operation conditions (toe) based on a measurement, d) selecting one of a plurality of predetermined calculation models (mod(ti)) based on the received tire information (ti), wherein each of the predetermined calculation models (mod(ti)) defines the wheel load (WL) as a function of the footprint (L) and the tire operation conditions (toe) for a respective tire type and/or respective physical properties of the tire (1) as such, e) calculating the wheel load (WL) based on the determined footprint (L) and the received tire operation conditions (toe), using the selected calculation model (mod(ti)). Further, a corresponding system (10) for determining a wheel load (WL) is proposed.