Sensor arrangement for non-contact detection of deformation and/or reversible or irreversible size alterations of bodies used for various applications e.g. to determine diameter of rotating non-metallic disc

摘要

The sensor arrangement is designed with a resonant circuit (RLC) on the body (10), the damping of which varies, depending on the deformation and/or the size alteration of the body (10). At least one inductive (analogue) distance sensor (20, fig.2) is arranged at a distance from an inductance (L1) of the resonant circuit, for determining the damping. The resonant circuit is tuned to an electromagnetic field produced by the distance sensor (20) and is excited by this to vibrate.