Sensor device, method and device for monitoring a sensor device, and system having a sensor device
First Claim
1. A method for monitoring a sensor device, which comprises the steps of:
- disposing the sensor device at a mounting position in a wheel;
the sensor device containing an acceleration sensor outputting a measurement signal representative of acceleration of the sensor device;
establishing a correlation coefficient in dependence on the measurement signal of the acceleration sensor and a square of a vehicle speed of a motor vehicle on which the wheel is disposed; and
detecting detachment of the sensor device from the mounting position based on the correlation coefficient.
2 Assignments
0 Petitions
Accused Products
Abstract
A sensor device is disposed in a wheel. It contains an acceleration sensor, the measurement signal of which is representative of the acceleration of the sensor device. Detachment of the sensor device from its mounting position is detected according to the measurement signal of the acceleration sensor. The sensor device can also contain a position sensor, the measurement signal of which is representative of a relative position of the sensor device based on its mounting position. The sensor device can also contain a deformation measuring element disposed in such a way that a measurement signal of the deformation measuring element exhibits a characteristic oscillation if the sensor device has become detached from its mounting position.
13 Citations
14 Claims
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1. A method for monitoring a sensor device, which comprises the steps of:
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disposing the sensor device at a mounting position in a wheel;
the sensor device containing an acceleration sensor outputting a measurement signal representative of acceleration of the sensor device;establishing a correlation coefficient in dependence on the measurement signal of the acceleration sensor and a square of a vehicle speed of a motor vehicle on which the wheel is disposed; and detecting detachment of the sensor device from the mounting position based on the correlation coefficient.
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2. A method for monitoring a sensor device, which comprises the steps of:
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disposing the sensor device at a mounting position in a wheel;
the sensor device containing an acceleration sensor outputting a measurement signal representative of an acceleration of the sensor device; andat a vehicle speed lower than a predefined vehicle speed threshold, detecting the detachment of the sensor device from the mounting position using a measure of a mutual deviation of a plurality of values, measured at time intervals, of the measurement signal of the acceleration sensor or of quantities derived therefrom.
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3. A method for monitoring a sensor device, which comprises the steps of:
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disposing the sensor device at a mounting position in a wheel;
the sensor device containing an acceleration sensor outputting a measurement signal representative of an acceleration of the sensor device; andat a vehicle speed higher than a predefined vehicle speed threshold, detecting the detachment of the sensor device from the mounting position if the measurement signal of the acceleration sensor falls below a predefined acceleration threshold or if the measurement signal does not change in correlation with the vehicle speed.
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4. A method for monitoring a sensor device, which comprises the steps of:
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disposing the sensor device at a mounting position in a wheel; forming the sensor device to contain a temperature sensor; and detecting detachment of the sensor device from the mounting position based on a temperature deviation obtained from a difference of two temperatures registered by the temperature sensor.
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5. A method for monitoring a sensor device, which comprises the steps of:
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attaching a sensor device to a mounting position in a wheel; and detecting detachment of the sensor device from the mounting position according to a measure of a signal strength of an information signal transmitted by the sensor device.
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6. A device for monitoring a sensor unit, the device comprising:
an evaluation unit detecting detachment of the sensor unit from a mounting position in a wheel;
said evaluation unit detecting the detachment according to a measure of signal strength of an information signal transmitted by the sensor unit.
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7. A sensor device to be disposed in a wheel at a mounting position, the sensor device comprising:
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a position sensor outputting a measurement signal representing a position of the sensor device in the wheel relative to the mounting position; said position sensor selected from a group consisting of a first position sensor, a second position sensor, and a third position sensor; said first position sensor being a magnetic field sensor; said second position sensor including a switch having a position dependent upon the position of the sensor device in the wheel relative to the mounting position; and said third position sensor including an electric conductor disposed in the wheel and two contacts which are only electrically coupled to said electric conductor in the mounting position.
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8. A sensor device to be disposed in a wheel at a mounting position, comprising:
at least one deformation measuring element disposed so that a measurement signal of said deformation measuring element exhibits a characteristic oscillation if the sensor device has become detached from the mounting position.
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9. A method for monitoring a sensor device disposed in a wheel at a mounting position, the sensor device contains at least one deformation measuring element disposed so that a measurement signal of the deformation measuring element exhibits a characteristic oscillation if the sensor device becomes detached from the mounting position, which comprises the step of:
detecting a detachment of the sensor device from the mounting position in dependence on a measure of the characteristic oscillation of the measurement signal of the deformation measuring element.
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10. A device for monitoring a sensor unit disposed in a wheel at a mounting position and having at least one deformation measuring element disposed so that a measurement signal of the deformation measuring element exhibits a characteristic oscillation if the sensor unit becomes detached from the mounting position, the device comprising:
an evaluation device detecting a detachment of the sensor unit from the mounting position in dependence on a measure of the characteristic oscillation of the measurement signal of the deformation measuring element.
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11. A system, comprising:
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a first sensor device to be disposed in a wheel at a mounting position; and a second sensor device having a sensor element for detecting vibrations transferred to the wheel by said first sensor device if said first sensor device becomes detached from said mounting position. - View Dependent Claims (12, 13, 14)
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Specification