Title :
Magnetoinductive position sensor
Author :
Vertesy, G. ; Szollosy, J. ; Lovas, A.
Author_Institution :
Central Res. Inst. for Phys., Budapest, Hungary
fDate :
9/1/1990 12:00:00 AM
Abstract :
A new type of magnetoinductive position sensor of simple construction is described. A miniature transformer is intermittently shielded from the saturating field of a permanent magnet by the rotation of a toothed, soft iron vane. The change in winding inductance with angular position controls the on/off state of an oscillator circuit. The angular deviation of the operating point is less than ±1° over the temperature range of -60 to 120°C for any power supply voltage from 4 to 30 V. The simple electronics packaged with the sensor delivers a high-level output. The sensor is versatile, inexpensive, and sufficiently robust to meet the demands of the automotive industry
Keywords :
automotive electronics; electric sensing devices; electromagnetic induction; magnetic devices; position measurement; transformer cores; -60 to 120 C; 4 to 30 V; amorphous ribbon; angular position controls; automotive industry; magnetoinductive position sensor; miniature transformer; oscillator circuit; packaging; winding inductance; Blades; Circuit faults; Inductance; Iron; Magnetic sensors; Magnetic shielding; Permanent magnets; Saturation magnetization; Sensor phenomena and characterization; Temperature sensors;
Journal_Title :
Magnetics, IEEE Transactions on
