| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing sensor by which a bearing can be measured with a low-cost configuration, continuously and with good accuracy. SOLUTION: An optical fiber loop 7 which detects an earth-rotation angular- velocity component and a tilt sensor 9 which detects an angle of inclination with reference to an earth horizontal plane are loaded on an excavator 2. At this time, a bearing is measured on the basis of the angular velocity component and the angle of inclination. In addition, a change in the bearing on within a time interval required for the measurement of the bearing is interpolated on the basis of the length of a right jack 4 and a left jack 4 which propel the excavator 2. |
