The speaker is permanently attached to the phone. If the magnetic field is permanent it is called “hard iron”.įor example a mobile phone has a speaker. Interference can be caused by ferromagnetic material or equipment in the magnetometers vicinity. In addition to earth’s, there are additional magnetic fields which cause interference. The magnetic field used for determining the heading is the earth’s magnetic field. There is one problem though, magnetometers are prone to distortion. Magnetometer provides the last three degrees of freedom in 9DOF sensors. They can also be used to determine orientation and to compensate gyro drift. Magnetometers are used to measure the strength of a magnetic field. How to Calibrate a Magnetometer? Fri, Feb 23, 2018
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