| 摘要 |
PURPOSE:To measure the traveling position without any error by substituting measured coordinate values with the coordinate values of a correction point when the correction point is passed and adding the X and Y components CX and CY of a correction vector to the X component and Y component of a magnetic field detector thereafter. CONSTITUTION:When the traveling position of the vehicle is measured by using a magnetic azimuth detector, the starting point whose coordinates are already known and one or plural correction points are provided in a travel range and when the correction point is passed, the measured coordinate values are replaced with the coordinate values of the correction point and the X and Y components CX and CY of a correction vector(error magnetic field vector) are added to the X component and Y component of the magnetic azimuth detector thereafter respectively. Namely, the normal measured values and plural azimuth measured values to which a unit correction vector is added in plural directions are obtained to calculate the correction vector from the measured coordinates when the correction point is passed, plural measured coordinates using an azimuth after the unit correction vector is added, and at least four coordinate values among correction point coordinates. Consequently, the vehicle can travel continuously without any error unless the error magnetic field vector varies. |
