Sensor unit for a vehicle
First Claim
1. A method of operating a sensor arrangement of a vehicle having at least one rotational speed detecting device, the method comprising:
- receiving, with at least one evaluating and control unit, at least one state variable from the at least one rotational speed detecting device, the at least one rotational speed detecting device configured to (i) continuously detect at least one state variable and (ii) output the at least one state variable to the at least one evaluating and control unit, the at least one rotational speed detecting device including an encoder disc having a predetermined number of encoding regions and an allocated sensor, each encoding region being configured to generate in the allocated sensor a measuring pulse of the detected at least one state variable, each measuring pulse having an individual pulse duration;
determining, with the at least one evaluating and control unit, a rotational speed of at least one wheel of the vehicle based on the detected at least one state variable, the at least one wheel having a wheel rim fastened to a corresponding wheel hub by way of wheel fastening means;
determining, with the at least one evaluating and control unit, the individual pulse duration for each encoding region based on the detected at least one state variable;
determining, with the at least one evaluating and control unit, a mechanical play between the at least one wheel and the corresponding wheel hub based on the individual pulse duration;
identifying, with the at least one evaluating and control unit, loosened wheel fastening means based on the determined mechanical play; and
outputting, with the at least one evaluating and control unit, a warning signal in response to loosened wheel fastening means being identified.
1 Assignment
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Accused Products
Abstract
The disclosure relates to a sensor arrangement for a vehicle having at least one rotation-speed detection apparatus, which continuously detects a state variable and outputs said state variable to an evaluation and control unit which receives and evaluates signals which are output by a rotation-speed detection apparatus, wherein the evaluation and control unit carries out a first evaluation process with the detected state variable and ascertains a rotation speed of at least one vehicle wheel, the rim of said vehicle wheel being fastened to a corresponding wheel hub by means of wheel fastening means. According to the disclosure, the evaluation and control unit carries out a second evaluation process and identifies and monitors, on the basis of the continuously detected state variable, mechanical play between the vehicle wheel and the corresponding wheel hub in order to detect detached wheel fastening means.
5 Citations
20 Claims
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1. A method of operating a sensor arrangement of a vehicle having at least one rotational speed detecting device, the method comprising:
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receiving, with at least one evaluating and control unit, at least one state variable from the at least one rotational speed detecting device, the at least one rotational speed detecting device configured to (i) continuously detect at least one state variable and (ii) output the at least one state variable to the at least one evaluating and control unit, the at least one rotational speed detecting device including an encoder disc having a predetermined number of encoding regions and an allocated sensor, each encoding region being configured to generate in the allocated sensor a measuring pulse of the detected at least one state variable, each measuring pulse having an individual pulse duration; determining, with the at least one evaluating and control unit, a rotational speed of at least one wheel of the vehicle based on the detected at least one state variable, the at least one wheel having a wheel rim fastened to a corresponding wheel hub by way of wheel fastening means; determining, with the at least one evaluating and control unit, the individual pulse duration for each encoding region based on the detected at least one state variable; determining, with the at least one evaluating and control unit, a mechanical play between the at least one wheel and the corresponding wheel hub based on the individual pulse duration; identifying, with the at least one evaluating and control unit, loosened wheel fastening means based on the determined mechanical play; and outputting, with the at least one evaluating and control unit, a warning signal in response to loosened wheel fastening means being identified. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A sensor arrangement for a vehicle, the sensor arrangement comprising:
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at least one evaluating and control unit; and at least one rotational speed detecting device connected to the at least one evaluating and control unit and configured to (i) continuously detect at least one state variable and (ii) output the at least one state variable to the at least one evaluating and control unit, the at least one rotational speed detecting device including an encoder disc having a predetermined number of encoding regions and an allocated sensor, each encoding region being configured to generate in the allocated sensor a measuring pulse of the detected at least one state variable, each measuring pulse having an individual pulse duration, wherein the at least one evaluating and control unit is configured to; receive the at least one state variable from the at least one rotational speed detecting device; determine a rotational speed of at least one wheel of the vehicle based on the detected at least one state variable, the at least one wheel having a wheel rim fastened to a corresponding wheel hub by way of wheel fastening means; determine the individual pulse duration for each encoding region based on the detected at least one state variable; determine a mechanical play between the at least one wheel and the corresponding wheel hub based on the individual pulse duration; identify loosened wheel fastening means based on the determined mechanical play; and output a warning signal in response to loosened wheel fastening means being identified. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification