Apparatus and method for sensing rotation of a wheel
First Claim
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1. An apparatus for sensing rotation of a wheel, the apparatus comprising:
- a sensor disposed in a wheel, the sensor operable to sense an earth magnetic field, wherein the sensor includes a magnetic field sensor, and wherein the magnetic field sensor is a coil which is also adapted for data transfer; and
a detector operable to detect a change of the sensed earth magnetic field in order to sense rotation of the wheel based on the detected change.
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Abstract
An apparatus for sensing rotation of a wheel includes a sensor and a detector. The sensor is disposed in a wheel, and is operable to detect the earth magnetic field. The detector is operable to detect a change of a sensed earth magnetic field in order to sense rotation of the wheel based on the detected change.
19 Citations
12 Claims
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1. An apparatus for sensing rotation of a wheel, the apparatus comprising:
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a sensor disposed in a wheel, the sensor operable to sense an earth magnetic field, wherein the sensor includes a magnetic field sensor, and wherein the magnetic field sensor is a coil which is also adapted for data transfer; and a detector operable to detect a change of the sensed earth magnetic field in order to sense rotation of the wheel based on the detected change. - View Dependent Claims (2, 3, 4)
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5. A method comprising:
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sensing an earth magnetic field; detecting a change of the sensed earth magnetic field; and sensing rotation of a wheel based on the detected change of the sensed earth magnetic field, wherein sensing the earth magnetic field comprises sensing the earth magnetic field by means of a coil which is further configured as an antenna for a transfer of data.
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6. An apparatus for sensing rotation of a wheel, the apparatus comprising:
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a sensor disposed in a wheel, the sensor operable to sense an earth magnetic field; a detector operable to detect a change of the sensed earth magnetic field in order to sense rotation of the wheel based on the detected change; and an activatable tire pressure sensor operable to sense the tire pressure, wherein the detector is further configured to provide an activation signal to the activatable tire pressure sensor based on the detected change. - View Dependent Claims (7, 8)
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9. A method comprising:
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sensing an earth magnetic field; detecting a change of the sensed earth magnetic field; sensing rotation of a wheel based on the detected change of the sensed earth magnetic field; generating an activation signal following the sensed rotation of the wheel; and sensing the tire pressure in response to the activation signal. - View Dependent Claims (10, 11, 12)
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Specification