Device, method and medium detecting errors generated by distortion in a magnetic field

摘要

A method, medium and electronic device using a three-axis geomagnetic sensor for quick and accurate measurement of an azimuth angle includes a first calculating unit to calculate distances between an output value of the three-axis geomagnetic sensor and an offset value, and a controller to determine that the offset value is distorted when the distance calculated by the first calculating unit deviates from a predetermined range of radius values. The electronic device can further include a sampling unit to sample output values of the three-axis geomagnetic sensor when the calculated distance deviates from the predetermined range of radius values, and a second calculating unit to calculate a mean value and a standard deviation value for distances between the sampled values and the offset value. The controller may determines that the offset value is distorted when the mean value and the standard deviation value deviate from predetermined permissible ranges.