A method and device for identifying pressure sensors of a tire pressure monitoring system (TPMS) of a motor vehicle. The method includes emission of a sensor activation signal, receiving of signals from at least two different sensors following activation, attenuation and amplification of the signals received, determination of a value indicative of the power of the signals received, and identification of the spatial position of at least one sensor on the basis of values indicative of the power of the signal received. A device configured as a TPMS tool is used for implementing the method.

A method and system for measuring a load on a tire while the vehicle traveling that include a microprocessor, a tire pressure sensor that is fixed to the tire, and an electromechanical sensor that is fixed to a point on the tire. The electromechanical sensor generates a beginning signal when the point begins to be part of the flat tire contact patch of the tire with the ground, and an ending signal when this point ceases to be part of the patch. The microprocessor calculates the patch contact time period, calculates the flat tire contact patch length from the radius of the tire and the ratio between the patch contact time period and the complete tire rotation period, and calculates the load on the tire from the tire pressure as measured by the pressure sensor and the length of the flat tire contact patch.

A method and system for measuring a load on a tire while the vehicle traveling that include a microprocessor, a tire pressure sensor that is fixed to the tire, and an electromechanical sensor that is fixed to a point on the tire. The electromechanical sensor generates a beginning signal when the point begins to be part of the flat tire contact patch of the tire with the ground, and an ending signal when this point ceases to be part of the patch. The microprocessor calculates the patch contact time period, calculates the flat tire contact patch length from the radius of the tire and the ratio between the patch contact time period and the complete tire rotation period, and calculates the load on the tire from the tire pressure as measured by the pressure sensor and the length of the flat tire contact patch.

A tire parameter monitoring apparatus, method, and system are provided. The apparatus includes a receiver, a processor, and an output circuit. The receiver may be configured to receive an excitation signal. The processor may be configured to determine an output parameter, such as a frequency, a phase, or an amplitude, of a reflected output signal based on a monitoring parameter of a tire, where resonance frequency information of the tire is related to the monitoring parameter of the tire, and the output parameter of the output signal is related to the resonance frequency information of the tire. Passive tire pressure monitoring can be performed, so that production and use costs of the tire pressure monitoring system can be reduced, and reliability can be improved.

A measurement device for measuring the pressure of a wheel (3) of a vehicle, the measurement device comprising a stationary portion (5) and a movable portion (14) for being driven in rotation by the wheel, the stationary portion including a first printed circuit (7) having at least one first track formed thereon defining a first winding, the movable portion including a second printed circuit (16) having at least one second track formed thereon defining a second winding, the second printed circuit being arranged to be connected to a pressure sensor (15), the first winding and the second winding being coupled together to form a wireless communication channel, the measurement device being arranged in such a manner that the pressure sensor is electrically powered by the stationary portion via the wireless communication channel, and in such a manner that uplink data comprising pressure measurement data is transmitted to the stationary portion (5) by the movable portion (14) via the wireless communication channel.

A system (1) for the management of data pertaining to a wheel service comprises: a database (2) including, for each tyre of a plurality of tyres, a tyre identification code; at least one tyre measurement parameter representing a physical quantity linked to the tyre or to the use thereof, and a related time mark, which indicates the time the tyre measurement parameter was captured; a knowledge dataset (3) containing reference data; a processor (4) having access to the database (2) and to the knowledge dataset (3) and programmed to process the at least one tyre measurement parameter and the reference data and to generate derived data.

In a road surface condition determining device, when determining a road surface condition, a vibration detection unit, a waveform processing unit and a data transmission unit for implementing a sensing function and a data transmission function are not set continuously to an active state for all tire side device, but at least only one tire side device is set to an active state. Remaining one or more is set to a sleep state. A reduction in power consumption of the tire side devices set to the sleep state can thus be achieved. Further, with regard to the at least one tire side device, since the sensing function and the data transmission function remain in the active state, the road surface condition can be reliably determined based on the road surface data of the tire side device.

A load-based tire inflation system for a heavy-duty vehicle comprises at least one source of fluid pressure, suspension structure of the heavy-duty vehicle, a tire and wheel assembly and a system to control fluid pressure in the tire and wheel assembly. The suspension structure is located between a frame member and an axle and has a condition indicative of a weight of the heavy-duty vehicle. The tire and wheel assembly is operatively mounted to the axle and is in fluid communication with the source of fluid pressure. The control system controls fluid pressure in the tire and wheel assembly in response to the condition of the suspension structure.

A pressure measuring device for a bicycle has a housing that includes a pressure chamber. The pressure chamber has a valve disposed in a first opening and a second opening into or out of a tire assembly volume of a tire assembly. A sense element is in pressure communication with the pressure chamber along a flow path between the first and second openings.

This invention relates to tire tread wear monitoring. A sacrificial magnet portion is arranged in a tread of the tire so that it undergoes wear along with the tread and generates a useful magnetic field signal indicative of remaining tread thickness. With a magnetic field sensor arranged on or in the tire, an overall magnetic field signal is measured, which includes the useful magnetic field signal, and a superimposed interfering magnetic field signal generated by magnetizable material contained in the tire. A non-sacrificial magnet portion is used to saturate the magnetizable material at least locally so as to make the interfering magnetic field signal sensed by the magnetic field sensor substantially independent of the useful magnetic field signal sensed by the magnetic field sensor. Further aspects of the invention relate to tires, e.g., vehicle tires, featuring a tire tread wear monitoring system.