MESSEINRICHTUNG ZUR ERFASSUNG EINES WEGS ODER EINES DREHWINKELS

摘要

In a measuring device (10) for determining the travel or angle of rotation of a machine component (21), one coil (19) is arranged on a sleeve-like body (16) and another (20) on a cylindrical body (17). The sleeve (16) and the core (17) are on a support (15). The core (17) engages in a sleeve (13) of non-ferromagnetic but electrically conductive material. In addition, the sleeve (16) is taken over a core (12) of ferromagnetic material. Here, the coil body (16) and the core (12) and the coil body (17) and the sleeve (13) are coaxial. Owing to the eddy current effect, the inductance in the coil (20) is reduced, while on account of the ferromagnetic effect the inductance in the coil (19) is increased. Errors of measurement can be partly eliminated and the measurement signal amplified through the cross-connection of the coils (19, 20) in an evaluation circuit.