| 摘要 |
PURPOSE:To reduce the cost of a device by measuring the position of a building berth by using one automatic tracking light-wave range finder and one automatic tracking light wave range finder goniometer. CONSTITUTION:A reference light source device which has a corner prism and a light source is installed at reference points A and B at both end of the base line l0 of a land part. Then, the automatic tracking light-wave range finder is installed at a reference point C on a building berth. Then, a light-wave range finder tracks the directions of the corner prisms at any time even if the building berth fluctuates or moves owing to the flow of sea water. AT this time, the automatic tracking light-wave range finder at the point C measures the distance l1 between the points A and B automatically at any time and output data. Further, the automatic tracking range finder goniometer at a reference point (d) collimates the point C on the building berth previously to set an angle display to zero, and then collimates the reference point B on the land automatically to measure the opposite side distance l2 and angle theta. Consequently, the building berth can be positioned. This device is reduced in manufacture cost because the system is simplified.
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