Magnetic resonance sensor for speed of rotation measurements - uses bistable magnetic element, with large Barkhausen effect, HF generator producing resonant circuit, and gives amplitude independent output pulse, with data on distance, direction of rotation of magnetic field

摘要

The sensor includes a bistable magnetic element (BME) core (1) which uses the large Barkhausen effect (LBE), an excitation coil (3) and a working point coil (4). The HF resonant circuit has the sensor coil (5) and a capacitor (6). A DC supply source (8) supplies voltage (UDC) to the system. The system (4) for producing the magnetic field is designed as a working point coil. The HF generator (2) feeds a sinusoidal voltage of constant amplitude (UHF) and constant frequency, to the HF resonant circuit which consists of sensor coil and capacitor, with excitation coil.