Patent ID: 7389590
Filing Date: 2008-06-24
Classification: G01C

Abstract:
1. A geomagnetic sensor for performing azimuth compensation work, comprising: a geomagnetic sensor module, including X, Y and Z axis fluxgates orthogonal to one another, for performing normalization for mapping output values of the X, Y and Z axis fluxgates onto a previously set normalization range using previously set normalization factors; an operation module for performing operation of new normalization factors based on a plurality of normalization values output from the geomagnetic sensor module while the geomagnetic sensor is swung within a previously set range; a tilt sensor module for computing a pitch angle and a roll angle; and a control module for providing the new normalization factors to the geomagnetic sensor module to allow the geomagnetic sensor module to perform renormalization and computing an azimuth using the output value renormalized by the geomagnetic sensor module and the pitch and roll angles computed during the renormalization.