Rotation angle measurement device, especially for determination of the position of a choke or exhaust gas valve member, has a compact design based on the use of two magnetic field sensors either side of a permanent magnet

摘要

Device for rotation angle measurement comprises a rotation axle (14), the angle of which is to be determined, to which the valve flap (10) is connected. The rotation axle is linked via a gear wheel (16) and a pinion (18) to a drive device (22) for rotation of the axle. A hemispherical permanent magnet (24) is mounted on a circular line of the gear wheel for angle determination. Two magnetic field sensors (32, 34) are positioned near the inner side (38) and outer side (40) of the magnet.