Apparatus and method for detecting an internal mechanical failure occurring in a tire
First Claim
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1. An apparatus for detecting an internal mechanical failure of a tire that is attached to a wheel of a vehicle while the vehicle is traveling, including:
- an information acquiring part for acquiring tire information on a predetermined portion of the tire at least in a tire radical direction and a tire width direction orthogonal to the tire radial direction during rotating while the vehicle is traveling, respectively;
a deriving part for deriving a deformation amount of a contact-portion of the tire at least in the tire width direction based on the tire information, the contact-portion being in contact with the ground;
a calculating part for calculating an evaluation value for determining a presence or absence of the internal mechanical failure based on the derived deformation amount of the tire at least in the tire width direction by the deriving part; and
a determining part for comparing the calculated evaluation value by the calculating part with a predetermined reference value to determine whether or not the internal mechanical failure has occurred in the tire.
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Abstract
An apparatus and method derives a deformation amount of a contact-portion of the tire based on the tire information, the contact-portion being in contact with the ground, and calculates an evaluation value based on the derived deformation amount, and comparing the calculated evaluation value with a reference value to determine whether or not the internal mechanical failure has occurred in the tire.
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Citations
15 Claims
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1. An apparatus for detecting an internal mechanical failure of a tire that is attached to a wheel of a vehicle while the vehicle is traveling, including:
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an information acquiring part for acquiring tire information on a predetermined portion of the tire at least in a tire radical direction and a tire width direction orthogonal to the tire radial direction during rotating while the vehicle is traveling, respectively; a deriving part for deriving a deformation amount of a contact-portion of the tire at least in the tire width direction based on the tire information, the contact-portion being in contact with the ground; a calculating part for calculating an evaluation value for determining a presence or absence of the internal mechanical failure based on the derived deformation amount of the tire at least in the tire width direction by the deriving part; and a determining part for comparing the calculated evaluation value by the calculating part with a predetermined reference value to determine whether or not the internal mechanical failure has occurred in the tire. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14)
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3. An apparatus for detecting an internal mechanical failure of a tire that is attached to a wheel of a vehicle while the vehicle is traveling, including;
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an information acquiring part for acquiring tire information on the tire during rotating while the vehicle is traveling; a deriving part for deriving a deformation amount of a contact-portion of the tire based on the tire information, the contact-portion being in contact with the ground; a calculating part for calculating an evaluation value for determining a presence or absence of the internal mechanical failure based on the derived deformation amount; and a determining part for comparing the calculated evaluation value with a predetermined reference value to determine whether or not the internal mechanical failure has occurred in the tire, wherein the information acquiring part acquires acceleration data of a predetermined portion of the tire in time series as the tire information, said acceleration data generated when the tire receives an external force from a road surface during rotating while the vehicle is traveling, and wherein the deriving part extracts acceleration data due to a deformation of the tire in time series from the acceleration data of the tire in time series acquired in the information acquiring part, and performs a second-order time integration with respect to the acceleration data due to the deformation of the tire to obtain displacement data, thereby calculating the deformation amount of the contact-portion of the tire.
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10. A method of detecting an internal mechanical failure of a tire that is attached to a wheel of a vehicle while the vehicle is traveling, including:
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acquiring tire information on a predetermined portion of the tire at least in a tire radial direction and a tire width direction orthogonal to the tire radical direction during rotating while the vehicle is traveling, respectively; deriving a deformation amount of a contact-portion of the tire at least in the tire width direction based on the tire information, the contact-portion being in contact with the ground; calculating an evaluation value for determining a presence or absence of the internal mechanical failure based on the derived deformation amount of the tire at least in the tire width direction by the deriving step; and comparing the calculated evaluation value by the calculating step with a predetermined reference value to determine whether or not the internal mechanical failure has occurred in the tire.
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15. A method of detecting an internal mechanical failure of a tire that is attached to a wheel of a vehicle while the vehicle is traveling, comprising;
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acquiring tire information on the tire during rotating while the vehicle is traveling; deriving a deformation amount of a contact-portion of the tire based on the tire information, the contact-portion being in contact with the ground; calculating an evaluation value for determining a presence or absence of the internal mechanical failure based on the derived deformation amount; and comparing the calculated evaluation value with a predetermined reference value to determine whether or not the internal mechanical failure has occurred in the tire, wherein the acquiring step is a step of acquiring acceleration data of a predetermined portion of the tire in time series as the tire information, said acceleration data generated when the tire receives an external force from a road surface during rotating while the vehicle is traveling, and wherein the deriving step is a step of extracting acceleration data due to a deformation of the tire in time series from the acceleration data of the tire in time series acquired in the acquiring step, and performing a second-order time integration with respect to the acceleration data due to the deformation of the tire to obtain displacement data, thereby calculating the deformation amount of the contact-portion of the tire.
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Specification