Patent ID: 6714004
Filing Date: 2004-03-30
Classification: F15B,G01B,G01D

Abstract:
A position measuring system comprising:a transmitter; a sensor with an inductive element to which the transmitter is coupled electromagnetically, said inductive element being essentially flat and designed as a printed coil; and an evaluating unit; wherein: the sensor and the transmitter are adapted to be positioned relative to one another; a measuring path extends along the inductive element; and the inductive element is coupled to an oscillator which is affected by the Q factor and/or the effective inductance of the inductive element, the Q factor and/or the effective inductance of the inductive element being determined by the size of an effective sensor region to which the transmitter is coupled and the sensor being designed in such manner that its shape transverse to the measuring path varies along the measuring path so that the size of the effective sensor region to which the transmitter is coupled is dependent on the relative position between the transmitter and the sensor along the measuring path in a direction transverse to a direction of separation therebetween.