Method and rotary encoder for measuring the absolute angular position

摘要

Method for determining the absolute angular position of a rotating component, especially a shaft (3), using a first fixed unit with evaluation electronics and at least two sensor pairs (6-8) that are pre-magnetized by at least a magnetic field source. Additionally a rotating modulator (9) rotates adjacent to the sensor pairs in order to modify the magnetic flux generated by the magnetic field source. The sensor pairs are covered for different periods by the moderator and absolute angular position is determined by comparing the field strength excitation of the GMR sensors. An independent claim is made for an angular transmitter for measuring the absolute angular position of a rotating component.