DEVICE FOR DETERMINING A PATH OR AN ANGULAR ROTATION

摘要

A device (10) useful for determining the path or the angular rotation of a machine part comprises a diaphragm (15) which moves between two stationary discs (11, 12). A coil (17) through which a high-frequency alternating current flows is arranged on one disc (12) and a preferably semi-circular layer (19) of an electrically conductive material is applied to the other disc (12). The diaphragm (15) carries on its front face (22) facing toward or away from the coil (17) several semi-circular strips (22) of ferromagneticd material and strips (23) of electrically conductive non-ferromagnetic material in regular sequence. This makes it possible to eliminate measurement errors due to axial displacements of the diaphragm (15).