Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 11, 2010
Patent Application Number
11952378
Date Filed
December 7, 2007
Patent Primary Examiner
Patent abstract
A method and arrangement for detecting rotational movement. The method comprises the steps of arranging a sensor at the end of a rotation axle of a rotating object and at a distance from the rotation axle, arranging a detector external to the end of the rotation axle of the rotating object in such a manner that the distance between the sensor and detector changes as the object turns around its rotation axle, transmitting an poll to from the detector to the sensor, receiving the poll at the sensor, and in response to receiving the poll, transmitting a reply from the sensor to the detector, determining the power used in signaling, and detecting rotational movement on the basis of the change in signaling power.
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