| 摘要 |
PURPOSE: A prism target for measuring coordinates of a railroad is provided to reduce time for installing a prism target in a railroad by installing the prism target to be closely joined and to precisely install because a plurality of horizontal gauges and ball bearings. CONSTITUTION: A prism target(100) for measuring coordinates of a railroad comprises a prism(110), a prism pole(120), a rail coupling unit(130), and a ball bearing(133). The prism receives lights from a light wave machine. The prism pole is joined in the lower part of the prism. The rail coupling unit is joined to the lower part of the prism pole and comprises a rail coupling groove being formed into a shape same with a rail. The ball bearing is arranged in the inside of the rail coupling unit so that the prism pole can be rotated back and forth. |
