Method for calibrating geomagnetic sensor of electronic device and electronic device thereof

A method for calibrating a geomagnetic sensor of an electronic device, the method comprising:

• operating an acceleration sensor of the electronic device while a gyro sensor of the electronic device is inactivated;
• determining whether motion of the electronic device corresponds to one of a predetermined first motion pattern and a predetermined second motion pattern, based on acceleration data acquired by the acceleration sensor;
• driving the geomagnetic sensor to thereby acquire geomagnetic data, wherein, when the motion corresponds to the first motion pattern, the geomagnetic data is first geomagnetic data acquired at a first sample rate, and, when the motion corresponds to the second motion pattern, the geomagnetic data is second geomagnetic data acquired at a second sample rate higher than the first sample rate;
• and
• calibrating the geomagnetic sensor, based on the geomagnetic data.

An electronic device comprising:

• an acceleration sensor for outputting acceleration data about motion of the electronic device;
• a geomagnetic sensor for outputting geomagnetic data about a magnetic field around the electronic device;
• and
• a low-power processor electrically connected to the acceleration sensor and the geomagnetic sensor,
• wherein the low-power processor is configured to:
• determine whether the motion of the electronic device corresponds to one of a predetermined first motion pattern and a predetermined second motion pattern, based on the acceleration data acquired by the acceleration sensor;
• compare an accuracy of the geomagnetic sensor with a preset threshold value by driving the geomagnetic sensor, when the motion corresponds to one of the first motion pattern and the second motion pattern;
• acquire the geomagnetic data from the geomagnetic sensor when the accuracy of the geomagnetic sensor is less than the threshold value, wherein, when the motion corresponds to the first motion pattern, the geomagnetic data is first geomagnetic data acquired at a first sample rate, and, when the motion corresponds to the second motion pattern, the geomagnetic data is second geomagnetic data acquired at a second sample rate higher than the first sample rate;
• and
• calibrate the geomagnetic sensor, based on the geomagnetic data.