Patent ID: 7987606

Claim:
A system for testing accuracy of an electronic compass, the system comprising: a circular track; a compass seat surrounded by the circular track, the electronic compass being installed on the compass seat; an electromagnetic element movably disposed on the circular track; a driver configured for driving the electromagnetic element to move along the circular track; a power source for powering the electromagnetic element so that the electromagnetic element generates a magnetic field, the electronic compass measuring the magnetic field and calculating direction relative to the magnetic field at a plurality of points of the circular track when driven to move along the circular track and outputting a plurality of magnetic densities and a plurality of directional results, each of which is associated with a corresponding point of the circular track; a calculator configured for comparing the magnetic densities and the directional results with a plurality of ideal values to determine the accuracy of the electronic compass; and a magnetic shielding chamber for shielding the electromagnetic element and the electronic compass from interference of external magnetic fields.