Rotational angle measurement device for measuring absolute angle, has assemblies supported around rotational axes, where alterations caused by movements of assemblies at measuring point are detected by sensor switching circuit

摘要

The device has magnet assemblies (7, 8) rotatably supported around two different rotational axes (9, 10), where rotating movements of the assemblies exhibit different rotational frequencies. Magnetic field alterations caused by the rotating movements of the assemblies around the rotational axes at a measuring point are detected by an electronic magnetic sensor switching circuit (5). The rotating movements are evaluated according to a vernier principle to determine an absolute angle. The sensor switching circuit forms a three-dimensional (3D) hall sensor.