Title :
Magnetoresistive sensors for rotary position encoders
Author_Institution :
Princeton Electro-Technol., Los Angeles, CA, USA
fDate :
9/1/1990 12:00:00 AM
Abstract :
It is pointed out that a magnetoresistor is very sensitive to flux changes, and may therefore operate with wide tolerances in the air gap between it and the encoder wheel. It may also be designed with a high impedance for low power consumption. A general description of a magnetic encoder and its typical output is given. Encoder wheels and magnetoresistors are discussed. Encoder performance is examined: the continuous output wave from one channel with 40 mV peak-to-peak is shown
Keywords :
Permalloy; angular measurement; electric sensing devices; magnetic devices; magnetic field measurement; magnetoresistance; position control; position measurement; 40 mV; NiFe permalloy film; encoder wheel; glass substrate; magnetic encoder; magnetoresistive sensors; magnetoresistor; rotary position encoders; Coercive force; Conductivity; Ferrites; Magnetic fields; Magnetic flux; Magnetic heads; Magnetic sensors; Magnetization; Magnetoresistance; Wheels;
Journal_Title :
Magnetics, IEEE Transactions on
