Sensor with permanent magnet system for measuring motion - has permanent magnet rings separated by weakly magnetic ring plate, coil arrangement

摘要

Movement of the permanent magnetic system (1.4) induces a voltage in a coil arrangement (1.11) contg. at least one coil (1.5). The permanent magnet system consists of at least two permanent magnet rings (1.1, 1.2) separated by at least one weakly magnetic intermediate ring plate (1.3). The like poles of the magnet rings face each other and the rings are concentrically mounted inside the coil arrangement. The distance ring plate is in the centre of the coil arrangement in the rest position of the sensor. USE/ADVANTAGE - Motion parameter measurement sensor is of low wt. and small size and achieves good sensitivity.