Angle Measurement Method Based on Cross-Orthogonal Hall Sensor

Angle measurement sensors have gained widespread application in fields of automobiles, machinery, and other industries. The cross-orthogonal architecture based on Hall sensors is proposed to position angle. Meanwhile, A novel angle calibration algorithm effectively reduces the error caused by the offset voltage, the unequal amplitude and the additional harmonics. A special FPGA test has been designed to measure the angle of rotation of the artificial magnetic field and verify the proposed methods. The angle measurement results show an average measured error of
$\pm 1.263^{\circ}$
, which can meet the requirements of industrial and practical applications.