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AssigneesContinental Automotive France, Continental Automotive GmbH
InventorsStéphane Billy, Jean-Christophe Bouthinon
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A method for detecting and estimating an angle of rotation on itself, about a mounting axis, of a wheel unit with an acceleration sensor, the wheel unit being associated with a tire mounted on a rim, forming a wheel, the sensor detecting a gravitational force during the rotation of the wheel, forming a sinusoid. The wheel unit is mounted on the wheel with the acceleration sensor directly or indirectly inclined with respect to a plane tangential to the rim. The angle of rotation on itself of said wheel unit and therefore of the acceleration sensor at a given instant is estimated by comparing at least one parameter of the sinusoids that are obtained for the wheel unit in an initial mounting position on the wheel and in its position at this given instant, respectively.
A method for detecting and estimating an angle of rotation on itself, about a mounting axis, of a wheel unit for measuring operating parameters of a tire with a radial acceleration sensor integrated into said wheel unit, the tire being mounted on a rim, forming, with the rim, a vehicle wheel able to rotate about a rolling axis, the sensor detecting a gravitational force during the rotation of the wheel forming a sinusoid as a function of time, the rotational speed of the wheel being a function of the diameter of the wheel and of the period of the sinusoid, wherein the wheel unit is mounted on the wheel with the acceleration sensor directly or indirectly inclined with respect to a plane tangential to the rim, and wherein the angle of rotation on itself of said wheel unit and therefore of said acceleration sensor at a given instant is estimated by comparing at least one parameter of the sinusoids that are obtained for the wheel unit in an initial mounting position on the wheel and in its position at this given instant, respectively.
A method for monitoring and compensating a transmission power of radio waves from an acceleration sensor of a wheel unit, wherein there is estimation of an angle of rotation on itself of the wheel unit in accordance with a detection and estimation method as claimed in any one of the preceding claims and a range of firing angles considered to allow a transmission of radio waves with an acceptable power and, when this angle of rotation corresponds to a firing angle that is not within the predetermined range of firing angles, a diagnosis of unacceptable transmission power is transmitted.
Dependencies are inferred from the claim text.