| 摘要 |
PURPOSE:To have a tunnel surveying system suitable for man-power saving, miniaturization and being made lightweight, to make it possible to easily turn and continuously follow target even in the case of curve execution and to enable the number of times of survey and survey hours to reduce greatly. CONSTITUTION:In a shield tunnel, etc., having a narrow field of vision, a laser boresight equipment 1 having an angle measuring function is provided forward of a backward collimation point O set is the tunnel. A laser light radiated from the laser boresight equipment 1 is refracted, and wedge prisms 2, 3,... capable of measuring a turn of the refracted laser light are provided to positions on a shield machine 6 side separated from the laser boresight equipment 1. A rangefinder is provided to the wedge prism 2 located at the nearest position to the shield machine 6, and a target 5 is set in the shield machine 6. |
