| 摘要 |
PURPOSE:To acculately detect the position of a vehicle even under an adverse condition, by receiving horizontal revolving laser beam emitted from a reference point to an entire azimuth by a cylindrical entire azimuth beam receiver held horizontally and calculating the position of the vehicle from a beam receiving circular arc center angle and a vehicle posture angle with respect to a reference running direction. CONSTITUTION:Revolving laser beam emitted from a reference point A toward an entire horizontal direction is received by the cylindrical entire azimuth beam receiver with a radius (r) of the vehicle at a position O held horizontally and the center angle alpha formed by a beam receiving circular arc PR of which the middle point is Q is measured and a distance AO is calculated from the angle alphaand the radius (r). Angles alpha, delta formed by a vehicle azimuth direction and a straight line AQ and that made by a reference azimuth are measured and the azimuth angle beta at the point O based on the point A to the reference running direction is also calculated and determined. By this method, the position of a vehicle is accurately calculated even under such an adverse condition that a running route changes frequently or a geographical state is unfavorable.
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