System and method for determining at least one tire contact area parameter characterizing a dimension of a tire contact area on a tire of a wheel of a vehicle
First Claim
1. A system for determining at least one tire contact area parameter characterizing a dimension of a tire contact area of a tire on a wheel of a vehicle, the system comprising:
- a sensor module disposed on the tire, said sensor module including;
a sensor configured to acquire a sensor signal that is dependent on a mechanical tire loading at a predetermined measuring point on the tire; and
a first evaluation device configured to evaluate the sensor signal and to provide data based on the sensor signal, the data containing at least one data element specifying at least one time point in the sensor signal characterizing a passage of the measuring point through the tire contact area;
said first evaluation device being configured to perform an analysis of the sensor signal with reference to at least one predetermined evaluation criterion relating to a signal quality of the sensor signal in order to provide quality information characterizing the signal quality of the sensor signal; and
a second evaluation device configured to calculate the tire contact area parameter by evaluating the data provided by said first evaluation device;
wherein the evaluation criterion relating to the signal quality of the sensor signal used in the analysis performed by said first evaluation device includes information that a signal-to-noise ratio of the sensor signal fulfills at least one predetermined signal-to-noise ratio criterion.
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Abstract
A system for determining a tire contact area parameter includes a sensor module on the tire. The sensor module has a sensor that receives a sensor signal which is dependent on a mechanical tire load at a predetermined measuring point on the tire. A first evaluation device evaluates the sensor signal and provides data based on the sensor signal. The data contain a data element which indicates a time point in the sensor signal. The time point characterizes a passage of the measuring point through the tire contact area. A second evaluation device calculates the tire contact area parameter by evaluating the data provided by the first evaluation device. The first evaluation device analyzes the sensor signal based on a predetermined evaluation criterion with respect to the signal quality of the sensor signal to provide signal quality information of the sensor signal.
16 Citations
15 Claims
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1. A system for determining at least one tire contact area parameter characterizing a dimension of a tire contact area of a tire on a wheel of a vehicle, the system comprising:
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a sensor module disposed on the tire, said sensor module including; a sensor configured to acquire a sensor signal that is dependent on a mechanical tire loading at a predetermined measuring point on the tire; and a first evaluation device configured to evaluate the sensor signal and to provide data based on the sensor signal, the data containing at least one data element specifying at least one time point in the sensor signal characterizing a passage of the measuring point through the tire contact area; said first evaluation device being configured to perform an analysis of the sensor signal with reference to at least one predetermined evaluation criterion relating to a signal quality of the sensor signal in order to provide quality information characterizing the signal quality of the sensor signal; and a second evaluation device configured to calculate the tire contact area parameter by evaluating the data provided by said first evaluation device; wherein the evaluation criterion relating to the signal quality of the sensor signal used in the analysis performed by said first evaluation device includes information that a signal-to-noise ratio of the sensor signal fulfills at least one predetermined signal-to-noise ratio criterion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for determining a tire contact area parameter characterizing a dimension of a tire contact area of a tire on a wheel of a vehicle, the method comprising:
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providing a sensor module with a first evaluation device and a sensor disposed on the tire; acquiring a sensor signal with the sensor that is dependent on a mechanical tire loading at a predetermined measuring point on the tire; evaluating the sensor signal with the first evaluation device and providing, based on the sensor signal, data with at least one data element that specifies a time point in the sensor signal characterizing a passage of the measuring point through the tire contact area; analyzing the sensor signal with the first evaluation device by reference to at least one predetermined evaluation criterion relating to a signal quality of the sensor signal in order to provide quality information characterizing the signal quality of the sensor signal; and using a second evaluation device to evaluate the data provided by the first evaluation device for calculating the tire contact area parameter; wherein the evaluation criterion relating to the signal quality of the sensor signal used in the analysis performed by said first evaluation device includes information that a signal-to-noise ratio of the sensor signal fulfills at least one predetermined signal-to-noise ratio criterion. - View Dependent Claims (13, 14, 15)
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Specification