Patent ID: 8903548
Filing Date: 2014-12-02
Classification: B61L,G05D

Abstract:
1. A position finding system comprising: a sensor unit having a first RFID transponder reader unit, a first inductive detector unit, and an analysis unit connectable to the first RFID transponder reader unit and the first inductive detector unit; and a transmitter unit having an RFID transponder and a component transmitter unit that is made of a metallic material, the sensor unit being configured to be movable relative to the transmitter unit, wherein the first RFID transponder reader unit is set up for absolute position determination and outputs a first position value, wherein the first inductive detector unit is set up for absolute position determination and outputs a second position value, wherein the analysis unit is configured to determine, from data acquired from the transmitter unit, an absolute position of the sensor unit relative to the transmitter unit based on the first and second position values, and wherein the analysis unit is configured to determine a coarse resolution of the absolute position using the first position value and subsequently a fine resolution of the absolute position using the second position value based on a change in induction of the component transmitter unit detected by the first inductive detector unit, and wherein the fine resolution is more refined than the coarse resolution.