System and method for determining at least one tyre contact area parameter characterising a dimension of a tyre contact area on a tyre of a wheel of a vehicle

Abstract

The invention relates to a system (10) for determining at least one tyre contact area parameter (L), comprising a sensor module (12) arranged on the tyre (1), which sensor module has a sensor (14) designed to accept a sensor signal (Us) which is dependent on a mechanical tyre load at a predetermined measuring point (16) on the tyre (1) and comprising a first evaluation device (18), designed to evaluate the sensor signal (Us) and the provision of data based thereupon, which data contain at least one data element which indicates at least one time point in the sensor signal (Us), said time point characterising a passage of the measuring point (16) through the tyre contact area, and comprising a second evaluation device (34) designed to calculate the tyre contact area parameter (L) by evaluating the data (D) provided by the first evaluation device (18). The first evaluation device (18) is designed to perform an analysis of the sensor signal (Us) on the basis of at least one predetermined evaluation criterion (S2, S3, S4) with respect to the signal quality of the sensor signal (Us), in order to provide quality information characterising the signal quality of the sensor signal (Us). The invention further relates to a corresponding determination method, a use of the system and/or of the method, and a computer program product.

Description

technical field [0001] The invention relates to a system and a method for determining at least one tire contact area parameter characterizing the size of the tire contact area (tire contact portion) on a tire of a wheel of a vehicle. Background technique [0002] A method is known from DE 10 2010 016 551 A1 in which the contact patch length of a vehicle tire is determined by means of a tire module arranged on the inner side of the tire. The tire module contains deformation sensors and evaluates the deformation of the vehicle tire as it enters and leaves the ground contact patch and determines the contact patch length of the tire from this deformation. The relevant measurement of the length of the contact patch is sent to a central receiving unit in the vehicle, where it is evaluated by means of an algorithm to monitor the tread of the tire by means of long-term statistics carried out on the measured values depth. [0003] From EP 2 774 784 A1 is known a method for determin...

AI Technical Summary

Problems solved by technology

[0005] However, in practice disturbance effects can arise due to various reasons (e.g. electromagnetic disturbance radiation, specific conditions such as the unevenness of the ground on which the vehicle is being driven, tire imbalances, mounted tire accessories, etc.) Determination of tire contact area creates problems

These disturbing effects can in various ways corrupt the useful signal generated by the sensor and / or the data signal formed by processing the useful signal

However, there is often the risk that the data provided are not suitable for the purpose of use based on these data

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