Displacement measuring device of displacement measurement method and long distance object of long distance object

摘要

PROBLEM TO BE SOLVED: To measure the position and the amount of displacement of an arbitrary number of measurement points which is to be displaced at a long distance, precisely and speedily with high resolution and in real time.;SOLUTION: A corner cube prism is arranged at a measurement point to be displaced. The measurement point is set to a position giving view of the measurement point to be displaced. Laser beams are projected from the measurement point to the measurement region to be displaced including the corner cube prism. The measurement region to be displaced is scanned to the left and the right, and vertically by the laser beams. One portion of the laser beams, emitted from the measurement point, is projected to a PSD. Retroreflection laser beams, reflected by the corner cube prism at the scanning process, are received by a photosensor element for detecting the position detection point of the measurement point to be displaced. The azimuth angle data of the measurement point to be displaced are detected from the light receiving position of laser beams that the PSD received at the position detection point. The amount of displacement at the measurement point to be displaced is computed, based on the azimuth angle data, and the displacement of the measurement point to be displaced is measured.;COPYRIGHT: (C)2005,JPO&NCIPI