AZIMUTH MEASURING DEVICE AND METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a single shaft type azimuth measuring device miniaturized furthermore. SOLUTION: This azimuth measuring device 10 includes a rotational angular velocity sensor 26 for detecting rotational angular velocitiesωU,ωV,ωWaround each axis in a UVW orthogonal coordinate system; a gravitational acceleration sensor 28 for detecting gravitational accelerations gU, gV. gWin each axial direction; a stepping motor 14 for rotating sensors 26, 28 by (60×n) degrees around the X-axis and positioning them; and a stepping motor 20 for rocking the sensors 26, 28 by±35.26 degrees around an axis orthogonal to the X-axis and positioning them. The azimuth measuring device 10 measures the rotational angular velocitiesωU,ωV,ωWand the gravitational accelerations gU, gV. gW, performs coordinate transformation of the rotational angular velocitiesωU,ωV,ωWand the gravitational accelerations gU, gV. gWinto rotational angular velocitiesωX,ωY,ωZand gravitational accelerations gX, gY. gZin an XYZ orthogonal coordinate system, and calculates an azimuth angleψbased on the rotational angular velocitiesωX,ωY,ωZand the gravitational accelerations gX, gY. gZ. COPYRIGHT: (C)2008,JPO&INPIT