Patent ID: 6969998
Filing Date: 2005-11-29
Classification: G01B,G01D,G01L

Abstract:
1. A method for ascertaining an angle of rotation or a torsional rotation, in which two resonators ( 2 , 4 ), provided with at least one protrusion and/or one recess ( 3 , 5 ), are excited, wherein the two resonators ( 2 , 4 ) have an essentially circular circumference and are rotatable relative to one another, and a rotation of one resonator relative to the other resonator leads to a change in its resonant frequency or to a change in an amplitude of the signal backscattered by the resonators ( 2 , 4 ) at a fixed frequency, and the change in resonant frequency or amplitude is used as a measure for ascertaining the angle of rotation.